VISHAY INTERTECHNOLOGY, INC.
EMI/RFI SOLUTIONS Electro- Magnetic Compatibility
I/O
CCFT TFT VIDEO CONTROLLER
BATTERY O / PORT I SERIAL CPU RAM COMPUTER AUDIO PORT ROM VRAM GATE GATE ARRAY PORT LCD I/O DISPLAY DISPLAY DC IC GRAPHIC
AUTOMOTIVE ARRAY VCC ENGINEERING SOLUTIONS
AUDIO AUDIO GPS OUT DRIVER ANTENNA
GYRO VCC TELECOMMUNICATIONS POWER SUPPLY RECEIVER RF LCD CONNECTOR .A. BASEBAND P lectro-Magnetic Interference (EMI) and Radio Frequency COMMON-MODE CHOKES Interference (RFI) is noise at radio frequencies generated Common-mode or differential-mode chokes are used to eliminate noise on a pair of conductors. Noise is “common mode” when it E by today’s sophisticated electronic equipment’s micro- is present or “common” to both conductors. It is usually induced processors, oscillators, and switching power supplies. Radio by the antenna effect of a conductor or printed circuit board (pcb) Frequency (RF) noise is often of sufficient strength as to interfere trace. Common-mode noise is typically “in phase” in the con- with, or even disable, operation of both consumer and vital com- ductors. Differential noise is present on only one conductor or munication services (i.e., police, fire, emergency medical and mil- present in opposite phase in both conductors. Common-mode chokes use the properties of two closely coupled magnetic fields itary). To reduce or eliminate EMI/RFI most countries have insti- to eliminate the interference problem by canceling the noise within tuted regulations and practices for the design, building and testing the magnetic fields. They are best employed to eliminate noise or of new electronic equipment so it does not create (or become sus- EMI on cables or signal tracks. ceptible to) EMI/RFI. This area of engineering is often referred to The choke should be located as close as possible to the driver or as Electro-Magnetic Compatibility (EMC). The following infor- receiver circuit, or at the signal entry point to the circuit board. Careful selection of an inductance value helps in matching line mation is designed to assist the EMC engineers and technicians in impedance and in providing bandwidth filter for the circuit. the proper selection of passive components to reduce EMI/RFI. Chokes can be configured in the common mode or differential mode depending on the application. Components designed for electromagnetic interference filtering (EMI) or radio frequency interference suppression (RFI) can be TRANSFORMERS A transformer provides an isolation barrier between a signal line classified into five main categories: L–Reflection (inductors, and the signal processing circuit, particularly where the signal common-mode chokes, and transformers), Z–Absorption (ferrite line exits the board or system. Whether the signal is being driven beads), C–Bypass (ceramic capacitors, film capacitors, varistors), or received, isolating the line reduces common-mode noise and R–Attenuation (resistors-attenuators), and C+R–Multifunction eliminates ground potential (or signal return) differences (thick film capacitor and resistor combinations and termina- between systems. High noise immunity is especially important in thyristor/triac driv- tions). The choice of component depends on how and where ing circuits, where the transformer provides an isolation between noise is being generated, and how and where the application cir- the driven load and a logic-based controller. An isolating pulse cuit will be operated in the customer’s end product. transformer provides much better noise immunity than an insulated gate bipolar transistor (IGBT) due to its inherently lower coupling capacitance, which is usually measured in tens of picofarads as L REFLECTION opposed to nanofarads for a power IGBT. The lower coupling capacitance improves the circuit’s immunity from noise generated INDUCTORS by the mains or by power switching devices, and many different The first and most common type of electromagnetic filter is the configurations are available to meet the needs of specific designs. inductor or choke. Inductors are used for both line filtering and energy storage. If a circuit is suspected of generating EMI, a well- Z ABSORPTION chosen inductor often can help eliminate the problem. For radiated interference, a toroidal inductor is often called for. Whether in SURFACE-MOUNT FERRITE BEADS surface-mount or leaded packaging, a toroidal inductor can virtu- Ferrite chip beads, also known as chip impeders, remove RF ally eliminate radiated fields thanks to its unique ability to contain energy from pcb traces. In this task, they function as high-fre- the magnetic flux within its core. The toroid configuration is also quency resistors that allow DC to pass while absorbing the RF less susceptible to induced noise from other components since energy and dissipating that energy in the form of heat. Compared the applied magnetic field tends to create equal and opposite currents with alternative solutions, surface-mount ferrite beads are small, inside the toroid, thus canceling out the effect of interference. lightweight, and inexpensive. Their high impedance values
2 ELECTRO-MAGNETIC COMPATIBILITY
INTRODUCTION TO EMC COMPONENTS
remove a broad range of RF energy while a closed magnetic cir- TYPE X AND Y RFI CAPACITORS cuit design eliminates crosstalk. Because of the bead’s resistance RFI Capacitors are used to reduce interference that is conducted on characteristics at RF frequencies, spurious circuit oscillations or the AC line either in common mode or in differential mode. resonances are reduced. Differential-mode interference can be envisioned as a noise source To select the best bead for the application, the designer needs to connected between the main and neutral wires. A properly applied know how much signal attenuation is required, the range of type X (or “line-to-line”) capacitor is an effective solution for this unwanted frequencies, the source of the electromagnetic energy, case. Common-mode interference is represented by a source between and the environmental and electrical conditions under which the either main or neutral and chassis ground, and the appropriate solu- circuit will operate. tion is a type Y (or “line-to-ground”) capacitor to provide filtering. Selection of the right bead for a particular frequency is not always X capacitor values are determined by the frequency spectrum of a simple process, since beads are only rated for impedance at 100 the offending noise sources and therefore can be any available MHz and thus may or may not be optimal for circuits operating at value, although they typically range from 0.1µF to 1.0µF, and are higher or lower frequencies. DC bias will also lower the effective metallized film construction. Improved pcb layout practices can impedance of the device. Formerly, the selection process would allow these values to be reduced. Two smaller value X capacitors have involved the study of several different graphs. Today there are usually a better solution than one larger value X capacitor, are available automated design tools like Vishay’s Surface Mount especially when used in a pie filter configuration with a choke. Y Ferrite Bead Designers Kit (pictured on page 3) to assist designers capacitors are normally ceramic and have values that are restricted in making the correct choice. typically to values around 4700pF to reduce to a minimum 50/60Hz leakage current to ground. The diagram (below left) of a C BYPASS CAPACITORS/VARISTORS noise suppression solution on an AC Power line shows the nor- mal use of both X and Y type capacitors. CERAMIC CAPACITORS Ceramic capacitors are often used to reduce EMI by shunting the X Capacitor Applications. X Capacitors are suitable only for unwanted signals to ground. Ceramic capacitors are available in applications where there is no danger of a short-circuit resulting many different configurations and sizes; choosing the right capacitor in an electric shock. X type capacitors are divided into subclasses for the application depends on the electrical characteristics of the corresponding to the peak voltages to which they are subjected in noise and the associated electrical circuit. Peak circuit voltage, fre- addition to the power line voltage. All three classes are described quency spectrum of both the wanted and unwanted signals, and in order of their popularity in the table below. energy content of the unwanted signal all play an important part in selecting the correct ceramic capacitor for EMI filtering. It is important when using capacitors as EMI filters to insure that the MAIN X TYPE CAPACITORS
circuit has a stable ground. The impedance of circuits using Subclass Peak pulse voltage Application Peak values of surge voltage √ in operation V ceramic capacitors as EMI filters are characterized by high impedance. p p (before endurance test) X1 2,5 kV
MAIN Y TYPE CAPACITORS
SWITCHING Subclass Type of bridged Rated AC voltage Peak values of surge voltage POWER LOAD insulation Vp (before endurance test) SUPPLY Y1 Double or VR ≤ 250V 8,0kV reinforced
Y2 Basic or 150V ≤ VR ≤ 250V 5,0kV supplementary Across-the-line capacitors (X-capacitors) suppress differential mode noise
3 Y Capacitor Applications. Capacitors connected between power ed harmonics (noise). Matching circuit impedance and attenuating sig- lines and ground (Y capacitors) have the potential upon a loss of nals between circuits is often done using a complex network of inde- earth ground to pass current from the device ground (metal case) pendent resistors. This same goal can be accomplished using a signal by means of capacitive leakage current. Y capacitors are designed chip that is designed to duplicate the resistor network on a single chip. to limit the leakage current so that no dangerous voltages or cur- Every resistor is performing similar because of the usage of the same rents can occur on exposed metal parts resulting in personal substrate and batch. This type of device is referred to as a chip attenu- injury or death. This leakage current is even more restricted in ator and can help prevent EMI. medical type equipment. In ordinary data processing equipment, class Y2 is generally required when bridging the AC primary to MULTIFUNCTION ground. Some applications such as bridging the DC side of the C+R A resistor and capacitor combination is often the simplest, most com- primary to ground may require a Y1 type. pact and inexpensive way to provide the filtering function. With thick film or thin film technology, a resistor/capacitor filter can be built for RFI CAPACITOR CONSTRUCTION either a low-pass or high-pass response depending on the schematic There are two types of RFI capacitors commonly in use on the AC chosen. Values can be adjusted to filter a wide range of frequencies line. These are metallized film and ceramic. The ceramic capacitor found in RF designs. These R/C filters can take the form of a single was described above. The metallized film are categorized as “self chip, or an array can be used where multiple signal lines need a partic- healing” while ceramic is not. The property of self healing, prop- ular frequency response. R/C filters are used for lines with no resistive erly designed into a capacitor, can extend its life while maintain- termination. Thin film resistor/capacitor networks provide substantial ing a small size and safe operation. space savings with exceptional performance.
THE PROCESS OF SELF HEALING EMI/EMC COMPONENT SELECTION Weak spot Once the designer knows which circuit paths and circuit areas are likely to conduct noise—and which circuit areas are likely to act as Dielectric Metallization antennas and radiate noise—the most appropriate location for the components chosen can be determined. The choice of components will depend on the frequency and signal level of the noise to be eliminated.
Heated material Naturally consideration must also be given to the frequencies that should be left intact. Another consideration is the circuit impedance. The diagram to the Weak spot right shows the relationship between impedance and the type of removed filter to be used.
VARISTORS TYPES OF TRANSIENTS FOUND ON THE LINE A varistor is used to protect sensitive circuits from excessive voltage excursions or spikes that could damage components. The diagram to Transient Peak (kV) 10– the right shows typical characteristics of voltage transients by peak voltage and transient duration in microseconds. A varistor acts as a 6kV –A short to voltage excursions or spikes that exceed the specified voltage 1– B 1.2kV of the varistor. By allowing voltage transients to be bypassed to ground 800V C a varistor can prevent circuit damage and reduce EMI problems. 400V D
R ATTENUATION 0.1 1 10 100 1000µS
A resistor is used to attenuate signals or to maintain signal integrity A = 0.1µS/6kV Atmospheric interference such as lightning. while reducing power consumption through the conversion of the sig- B = 60µS/1.2kV Failure in the network or in nearby equipment, such as flashovers and fuse breakings. nal’s electrical energy into heat. Excess noise is often generated in cir- C = 200µS/800V On/off operation of equipment such as motors, air conditioning units, etc. cuits because of impedance mismatches between circuits that result in D = 1000µS/400V Pulses from equipment such as welders, thyristors, triacs, etc. overdriving of components that can lead to the production of unwant-
4 ELECTRO-MAGNETIC COMPATIBILITY
In high-speed signal circuits, the easiest choice is a pure resistor termination followed by R/C filter terminations. The best choice is a Effective Impedance Calculator complex filter consisting of inductive and capacitive components. In lower-speed circuits, grounding stability must be determined FREQUENCY first. Capacitive EMI components are an excellent choice when a 1 200 INSTRUCTIONS: 2 225 EXAMPLE: 5 250 stable ground is available, but if the circuit has an unstable Determine the ZE for a 150 & 600 1. Select Frequency. 10 275 Ohm bead at 900MHz, and with a 15 300 ground, designers should consider using inductive components 2. Find desired “Z” in DC bias current of 300mA. Effective Impedance (Ze) 20 325 STEP 1: 25 350 window. Move pointer to 900 MHz Position. that can provide sufficient impedance to the noise to reduce it 30 375 STEP 2: 3. Select Nominal Bead 35 400 value directly above Read the Ze in Window Under 150 below the acceptable threshold for EMI or RFI. 40 425 Ohm Bead (146 Ohms) & 600 Ohm value(s) identified in 45 450 Bead (89 Ohms). Oftentimes it will be possible to measure the overall radiation Step 2 above. 50 475 STEP 3: 55 500 Move pointer to 300 mA Position. 60 525 level from a given piece of equipment only at the end of the design STEP 4: 65 550 Multiply the Values From Step 2 by 70 575 process, so choosing the wrong component can have adverse the % Listed Under the 150 Ohm 75 600 and 600 Ohm 80 625 consequences downstream. Although some measure of trial and FREQUENCY OF NOISE Beads in the % of Ze Window to 85 650 determine Ze with DC Bias. TO BE ATTENUATED 90 675 error may always be necessary, designers can minimize wasted FOR EXAMPLE: 95 700 Ze ñ 146 Ohms x 53.6% = 78.2 100 750 (ILB-1206 150 Ohm) time by observing the following rules: RATED IMPEDANCE 125 800 Ze ñ 89 Ohms x 50.5% = 45.0 @ 100MHz 150 900 (ILB-1206 600 Ohm) 175 1000 • Always place EMI/EMC components as close as possible to the NOMINAL BEAD VALUE NOMINAL BEAD VALUE ILB-1206 ILB-1206 noise source. 19 26 31 50 70 120 150 300 500 600 18 25 30 48 67 113 143 283 484 603 • Select EMI/EMC components that match the impedance of the EFFECTIVE IMPEDANCE (Ze) EFFECTIVE IMPEDANCE (Ze)
noise conduction path, whether or not this is the same as the ACTUAL IMPEDANCE @ EQUIVALENT CKT FOR SELECTED FREQUENCY circuit path. Remember that common-mode noise tends to COMPUTER MODELING (here, 85MHz) travel in a different path from circuit current. ILB-1206 EQUIVALENT CIRCUIT DATA SHEET NOMINAL RESISTANCE CAPACITANCE INDUCTANCE • Always begin the design process with EMI/EMC components IMPEDANCE (Ω) (Ω) (Ω) (Ω) 19 27 0.90 0.0635 that offer more than sufficient performance to meet emission ILB-1206 26 37 0.80 0.0750 31 37 1.00 0.0733 C RL standards. There is always time to work on reducing component Surface 50 75 0.40 0.1096 Mount Bead 70 95 0.15 0.1741 costs once a working design is developed. 120 150 1.50 0.3523 150 180 0.85 0.4928 300 330 1.75 1.0500 500 485 2.10 1.6900 600 810 2.00 2.4900 RELATIONSHIP OF IMPEDANCE TO TYPE OF FILTERS USED
Impedance of interference Line Impedance source/disturbed equipment DC BIAS CURRENT
INSTRUCTIONS:: 20 CIRCUIT DC BIAS 50 4. Select DC Bias Current CURRENT SELECTOR 75 low high (if any) by sliding bar 100 until it aligns with 150 nearest current in mA. 200 5. Read % of Effective 250 mA Impedance (Ze) In 300 Window For Specific high high 350 Bead Identified in 400 Steps 1-3. 450 500 RATED IMPEDANCE
high high @ 100MHz NOMINAL BEAD VALUE NOMINAL BEAD VALUE unknown unknown ILB-1206 ILB-1206 19 26 31 50 70 120 150 300 500 600 99.9 99.9 99.9 100.0 98.8 98.7 99.2 98.5 99.0 99.5 low low % OF EFFECTIVE IMPEDANCE (Ze) % OF EFFECTIVE IMPEDANCE (Ze)
% OF ACTUAL IMPEDANCE @ SELECTED BIAS CURRENT low low unknown unknown
Above is a representation of the calculator included in Vishay’s Surface Mount Ferrite Bead Designers Kit. The kit is available upon request.
5 HEAT
NOISE NOISE Z ABSORPTION L REFLECTION C BYPASS
VIDEO DISPLAY
APPLICATION GOAL VISHAY COMPONENTS CRT, LCD SCREEN, HDTV, TV
Suppress Noise from • Capacitor/Resistor Filter C+R Signal Lines • Ceramic Capacitor C • Ferrite Chip Bead Z TFT DISPLAY • Inductor L • Common Mode Choke Coil L • Chip Array R
Suppress Noise from • Varistor C AC Power Lines R Suppress Noise from • Ferrite Chip Bead Z DC Power Lines • Common Mode Choke Coil L C Z Suppress Noise from • Ferrite Chip Bead Z I/O Cables DATA I/O LINES L BACK LIGHT CCFT INVERTER C
DC–DC TFT SWITCHING DRIVER CONTROLLER L POWER SUPPLY C VIDEO I/O L POWER LINES VIDEO SIGNAL Z C C+R R
PERSONAL COMPUTER
APPLICATION GOAL VISHAY COMPONENTS SERVERS/PC, PDA, MODEM, NOTEBOOK
Suppress High Speed • Capacitor/Resistor Filter C+R Digital Signal Line Noise • Ceramic Capacitor C • Ferrite Chip Bead Z
• Inductor L C DISPLAY PARALLEL SERIAL USB KEYBOARD/ • Chip Array R Z PORT PORT PORT PORT MOUSE
LCD I/O POWER Suppress High Frequency • Ceramic Disc Capacitor C I/O Digital Noise on DC Power • Chip Capacitor C Line • Feed through Capacitor GRAPHIC VRAM CPU C IC C • Ferrite Bead HDD Z L • Inductor L ROM RAM • Common Mode Choke Coil L Z DC R GATE FDD Suppress High Frequency • Safety Capacitor C ARRAY Digital Noise on AC Power • Chip Array R BATTERY Line PC CARD/ Suppress High Frequency • Ferrite Clamps & Cores Z BUS C Digital Noise I/O Cables • Chip Array R L Z C POWER DVD/ L CD ROM C+R Z AUDIO PORT R
6 ELECTRO-MAGNETIC COMPATIBILITY
HEAT HEAT EMC APPLICATIONS NOISE R ATTENUATION C+R MULTIFUNCTION
AUTOMOTIVE
APPLICATION GOAL VISHAY COMPONENTS NAVIGATION, ENGINE CONTROL, STEERING, AUDIO, SUSPENSION
Suppress High Frequency • Varistor C Noise on DC Power Line • Ferrite Bead Z
• Common Mode Choke Coil CD-ROM L CLOCK POWER PORT • Choke Coil L SUPPLY VCC INTERFACE DRIVER + Suppress High Frequency • Capacitor/Resistor Filter C R ROM CPU Noise on Signal Lines • Ceramic Capacitor C • Varistor C VCC VCC C VIDEO VIDEO • Inductor L OUT L • Ferrite Bead Z XTAL DSK Z • Chip Array R RAM RAM C GATE ARRAY Suppress Noise from • Ceramic Capacitor C Z VCC C Voltage & Current Surges • Varistor C L • Inductor L C+R • Ferrite Bead Z AUDIO AUDIO OUT
Suppress High Frequency • Choke Coil L GPS ANTENNA Noise from Motors, Solienoids • Varistor C VCC DRIVER & Electronic Switches • Inductor L GYRO VCC C L Z C Z R C+R
TELECOMMUNICATION
APPLICATION GOAL VISHAY COMPONENTS TELEPHONE, FAX, CELLULAR, xDSL, SATELLITE
Suppress Line Noise from • Ceramic Capacitor C AM/FM, CB, TV/VCR • Ferrite Inductor Z • Common Mode Choke Coil L LL P.A. RECEIVER Suppress Transmitter Noise • Capacitor/Resistor Filter C+R (Low & High) • Ceramic Capacitor C • Chip Capacitor C • Attenuator R LCD
Suppress High Frequency • Line Filter C Z Digital Signal Noise • Feed Through Capacitor C C L Z RF • Ferrite Chip Beads Z C • Chip Array R
Suppress Line & Power • Varistor C L Supply Noise from Surges • Chip Capacitor C of Voltage and/or Current • Disc Capacitor C • Common Mode Choke Coil L BASEBAND C Suppress Static Discharge • Capacitor C POWER Noise SUPPLY C CONNECTOR R Z CCR +R
7 HEAT
NOISE NOISE Z ABSORPTION L REFLECTION C BYPASS
STA
L Z LOW CIRCUIT IM L Z L Z POWER LINE SIGNAL LINE SIGNAL TYPE
L L Z L L Z NARROWWIDE NARROW WIDE FILTERING EFFECT FILTERING EFFECT
COMMON MODE COMMON MODE COMMON MODE COMMON MODE NOISE NOISE NOISE NOISE
L L L L Z L L L L Z
YES NO YES NO YES NO YES NO
COMMON CHOKE: COMMON BEAD or CHOKE: COMMON CHOKE: COMMON BEAD or VARISTOR: MODE FILTER: MODE FILTER: MODE FILTER: MODE FILTER:
SMD SMD SMD SMD bead SMD SMD SMD SMD bead LPT-4545 LPT-4545 LPT-4545 ILHB-0603 LPT-4545 ILSB-0603 LPT-4545 ILBB-0402 LPT-3535 LPT-3535 LPT-3535 ILHB-0805 LPT-3535 ILSB-0805 LPT-3535 ILBB-0603 IHSM-3825 ILHB-1206 ILSB-1206 ILBB-0805 Leaded Leaded Leaded IHSM-4825 Leaded ILHB-1806 IMC-1210 ILB-1206 TJ3 IHSM-5832 TJ3 ILHB-1812 IHD-1 IMC-1812 TJ3 ILBB-1210 TJ4 IHSM-7832 TJ4 IHD-3 TJ4 ILBB-1806 SMD choke ISC-1210 ILBB-1812 TJ5 IDCP-1813 TJ5 TJ3 TJ5 LPT-4545 ISC-1812 (shielded) TJ6 IDCP-2218 TJ6 TJ4 TJ6 TJ7 TJ7 LPT-3535 TJ7 ILAS-1206 (array) IDCP-3020 TJ5 Leaded TJ8 TJ8 IHSM-3825 TJ8 IDCP-3114 TJ6 SMD varistor IHSM-4825 IM-1 TJ9 IDCP-3722 TJ9 TJ7 TJ9 IHSM-5832 IM-2 ILSB-0603 IDCP-3916 TJ8 IDC-2512 IHSM-7832 IM-6 ILSB-0805 TJ9 IM-8 ILSB-1206 IDC-5020 IDCP-1813 IDC-7328 IM-9 IMC-1210 IDCP-2218 IM-10 IDCS-2512 IDCP-3020 IMC-1812 IDCS-5020 IDCP-3114 IMS-2 ISC-1210 (shielded) IDCS-7328 IDCP-3722 IMS-5 ISC-1812 (shielded) IDCP-3916 Leaded IHD-1 IDC-2512 IHD-3 Leaded IHD-1 IDC-5020 IM-1 IHD-3 IDC-7328 TJ3 IM-2 IDCS-2512 TJ4 TJ3 IM-6 IDCS-5020 TJ5 TJ4 IM-8 IDCS-7328 TJ6 TJ5 TJ7 IM-9 TJ6 Leaded TJ8 IM-10 TJ7 TJ9 IMS-2 TJ8 IHD-1 IMS-5 TJ9 IHD-3 TE3 through 5 TD3 through 5 TJ3 through 9 TE3 through 5 TJ3 through 9 TD3 through 5 TE3 through 5 TE3 through 5 TD3 through 5 TD3 through 5
(Custom designs and variations of standards available upon request) 8 ELECTRO-MAGNETIC COMPATIBILITY
HEAT HEAT EMC FILTER SELECTION GUIDE
LOW IMPEDANCE & HIGH IMPEDANCE NOISE R ATTENUATION C+R MULTIFUNCTION
ART
C R C+R HIGH MPEDANCE
C C R C+R POWER LINE SIGNAL LINE SIGNAL TYPE
C C C C R C+R SURGE EMI SURGE EMI NOISE TYPE NOISE TYPE
ASSEMBLY ASSEMBLY ASSEMBLY ASSEMBLY METHOD METHOD METHOD METHOD
C C C C C C C C R C+R
LEADED SMD LEADED SMD LEADED SMD LEADED SMD
VARISTOR: EMI FILTER: EMI FILTER: VARISTOR: EMI FILTER: EMI FILTER:
RMV05 F1710-Y2 VJ0402Y RMV05 VP31 CZA RMV07 F1712-Y2 VJ0603Y RMV07 VP32 CRCA12E RMV10 F1772-X2 VJ0612Y RMV10 VP40 or S / X7R or Y5U RMV14 F1773-X2 RMV14 VP41 VJ0805Y RMV18 F1774-X2 RMV18 VP43 VJ1206Y CRCC1206 VP44 F1722-X1 VJ1210Y X7R or Y5U VP52 F1724-X2 VJ1812Y F1778-X2 VJ1825Y VP31 VJ0603Q F1779-X2 VJ2220Y VP32 VJ0805Q WYO-Y2 VJ2225Y VP40 VJ1206Q WKO-Y2 VP41 VJ1210Q WKP-Y1 VJ0402A VJ0603A VP43 VM3033Y-3033 VJ0805A VP44 VKO-X1/Y2 VM3640Y-3640 VJ1206A VP52 VKP-X1/Y1 VM4756Y-4759 VJ1210A VSSRC20-AB VJ1812A VTSRC20-AB VJ1825A VSORC20-AB VJ2220A VSORC-20AC VJ2225A VTSRC20-AC VSORC20-AC VRAC
T-Filter VSSRC20-AA VTSRC20-AA VSORC20-AA VSSRC20-AD VTSRC20-AD VSORC20-AD VRAA VRAD
9 EMC SURFACE MOUNT DEVICES POWER LINE AND SIGNAL LINE USE
R ATTENUATION Z ABSORPTION (FERRITE BEADS) Resistors attenuate all frequencies by converting the RMS current into heat. Ferrite bead absorbers block noise in the signal and convert it into heat.
SIGNAL LINE POWER LINE THICK FILM CHIP ATTENUATOR MULTILAYER FERRITE CHIP BEAD Type / (LxW) Attenuation Impedance MEDIUM–HIGH CURRENT
CZA / .063 in x .059 in 1–6db 50–75 Ohms Type– Dimension IMP / DC Current CZA ILHB–0603 60 – 120Ω / 2000mA ILHB–0805 30 – 600Ω/ 2000 – 6000mA ILHB–0603 ILHB–1206 500 – 600Ω/ 2500 – 6000mA ILHB–1806 60Ω/ 6000mA THICK FILM ARRAY ILHB–1812 120 – 1300Ω/ 3000 – 6000mA
Type– Dimension Value Tolerance
CRA06 10 - 1M Ω 5%
CRA06 THIN FILM ARRAY Type– Dimension Value Tolerance SIGNAL LINE TRAO6E 10-330K Ω 1-5% MULTILAYER FERRITE CHIP BEAD Type– Dimension IMP
ILBB–0402 20 – 600Ω ILBB–0603 10 – 2000Ω ILBB–0805 7 – 2200Ω + MULTIFUNCTION ILBB–0603 ILB–1206 19 – 2000Ω C R ILBB–1210 31 – 90Ω Combines two or more noise ILBB–1806 80 – 150Ω attenuation methods ILBB–1812 70 – 120Ω
MULTILAYER FERRITE CHIP BEAD ARRAY SIGNAL LINE Type– Dimension IMP ILAS–1206 60 – 1000Ω THICK FILM RESISTOR / CAPACITOR CHIP (0603 x 4) (STANDARD SPEED) Type– Dimension / Dielectric Capacitance / Resistance
CRCC1206 / X7R 10– 270pF / 10–1 MΩ
CRCC1206 / Y5U 270–1800pF / ILAS–1206 10–1 MΩ CRCC1206 THICK FILM RESISTOR / CAPACITOR ARRAY
Type / Die (LxW) Terminals Capacitance / Resistance
5.1 x 3.1 mm /Y5U 8 10–270pF 10–1 MΩ 270–1800pF CRCA12E or S / XYR 10 10–1 MΩ 10–270pF 6.4 x 3.1 mm /Y5U 10 10–1 MΩ 2700–1800pF 10–1 MΩ
“E” = scalloped edge “S” = square edge CRCA12E
THICK FILM RESISTOR / CAPACITOR ARRAY
Type / Terminator Network Capacitance / Resistance VSSRC20-AB 10-250pF / 10-750Ω VTSRC20-AB 10-250pF / 10-750Ω VSORC20-AB 10-250pF / 10-750Ω VSSRC20-AC 10-250pF / 10-250Ω VTSRC20-AC 10-250pF / 10-750Ω VSORC20-AC 10-250pF / 10-750Ω VSORC20-AC 10-250pF / 10-750Ω VRAC 47pF /33Ω
Filter
VSSRC20-AA 10-250pF / 10-750Ω VTSRC20-AA 10-250pF / 10-750Ω VSORC20-AA 10-250pF / 10-750Ω VRAA 47pF /47Ω VSSRC20-AD 10-250pF / 10-750Ω Note: Case sizes are listed in EIA standard sizes. Unless stated otherwise, VTSRC20-AD 10-250pF / 10-750Ω VSORC20-AD 10-250pF / 10-750Ω case sizes use inches: e.g., 0805 equal .08 in long by .05 in wide. 10 VRAD 50pF /75Ω ELECTRO-MAGNETIC COMPATIBILITY
L REFLECTION C BYPASS Inductors reflect noise back to the source. Noise elements in the signals are shunted Very effective for low impedence lines. to ground and prevented from entering the load. Very effective for high impedence lines.
NORMAL MODE POWER LINE
POWER LINE MULTILAYER CERAMIC CHIP CAP HIGH VOLTAGE & SURGE SUPPRESSION HIGH CURRENT MOLDED INDUCTOR Type– Dimension Capacity / VDC Type– Dimension Inductance / Current VJ0603Y 220 pF– 4700pF / 200V IHSM–3825 1– 1000µH / 5.1 – .16A VJ0805Y 220pF– .027uF / 200V IHSM–4825 1– 1000µH / 8.6 – .24A VJ1206Y 680 pF– .068uF / 200, 500V IHSM–5832 1– 4700µH / 9 – .14A VJ1210Y 1000pF–.15uF / 200, 500V IHSM–5832 IHSM–7832 1– 18000µH / 9 – .11A VJ1808Y 470pF– .1uF / 200, 500V, 1000V VJ0603Y VJ1812Y 1000pF – .33uF/ 200, 500V, 1000V VJ1825Y .015uF– .68uF / 200, 500V, 1000V VJ2220Y .015uF– .47uF / 200, 500V HIGH CURRENT DRUM CORDS INDUCTOR VJ2225Y .033uF– 1.2uF / 200, 500V, 1000V Type– Dimension(LxH) Inductance / Rated Current VJ0603A 1pF – 270pF / 200V VJ0805A 1pF – 820pF / 200V, 500V IDCP–1813 1 – 68µH / 3.8 – .46A VJ1206A 1pF – 3300pF / 200V, 500V IDCP–2218 3.3 – 220µH / 2 – .35A 10pF – 5600pF / 200V, 500V IDCP–3020 10 – 470µH / 2.2 – .34A VJ1210A IDCP–1813 IDCP–3114 10 – 330µH / 1.14 – .28A VJ1808A 120pF– 6800pF / 200V, 500V,1000V IDCP–3722 10 – 820µH / 2.6 – .24A VJ1812A 10pF– .012uF / 200V, 500V, 1000V IDC–5020 1– 100µH / 6.8 – .3A VJ1825A 100pF– .027uF / 200V, 500V IDCS–5020 1– 390µH / 5 – 33A VJ2220A 2200pF– .012uF/ 200V, 500V,1000V IDCP–3916 VJ2225A 1000pF– .039uF/ 200V, 500V IDC–2512 IDC–5020 IDC–5020 IDC–7328 MULTILAYER CERAMIC CHIP VARISTOR IDCS–5020 IDCS2512 METAL OXIDE IDCS–5020 Type– Dimension VDC Surge 1 IDCS–7328 VV0603Z 5.5 – 18V / 30A VV0805Z 5.5 – 18V / 150A VV1206Z 5.5 – 65V / 150 – 200A VV1210Z 5.5 – 65V / 150 – 400A VV0603Z VV1812Z 5.5 – 65V / 250 – 600A NORMAL MODE VV2220Z 5.5 – 65V / 300 – 1000A SIGNAL LINE
MULTILAYER FERRITE CHIP IN INDUCTOR Type– Dimension Inductance SIGNAL LINE
ILSB–0603 .047 – 4.7µH MULTILAYER CERAMIC CHIP CAP ILSB–0805 .047 – 27µH HIGH Q ILSB–1206 .047 – 33µH Type– Dimension Capacitance /VDC ILSB–1206 VJ0603Q 1pF–100pF/ 50V, 100V VJ0805Q 1pF–220pF/ 50V, 100V, 200V VJ1206Q 1pF–330pF/ 50V, 100V, 200V WIREWOUND CHIP INDUCTOR VJ0603Q (SHIELDED AND UNSHIELDED) VJ1210Q 180pF–680pF/ 50V, 100V, 200V Type– Dimension Inductance ISC-1210 IMC–1210 .01 – 220µH MULTILAYER CERAMIC CHIP CAP IMC–1812 .01 – 1000µH X7R (NORMAL) ISC–1210 (SHIELDED) .01 – 100µH Type– Dimension Capacitance/ VDC IMC-1210 ISC–1812 (SHIELDED) .1 – 1000µH VJ0402Y 100 – 10,000pF / 25 – 100V VJ0603Y 100 – 100,000pF / 16 – 100V VJ0805Y 100 – 330,000pF / 16 – 100V VJ1206Y 100 – 1,000,000pF / 16 – 100V IMC-1812 VJ1210Y 27,000 – 1,000,000pF / 25 – 100V VJ1812Y 100,000 – 1,500,000pF / 25 – 100V COMMON MODE VJ2220Y 270,000 – 1,500,000pF / 50 – 100V VJ2225Y 180,000 – 4,700,000pF / 50 – 100V
POWER & SIGNAL LINE X7R (LOW INDUCTANCE) VJ2225Y 8200 – 220,000pF / 25 – 50V LOW PROFILE TOROIDAL INDUCTOR Type – Dimension IMP X7R (MULTI-CHIP ASSEMBLED)
LPT– 4545 Custom VM3033Y – 3033 150 – 1200pF / 50 – 500V LPT– 3535 Custom VM3640Y – 3640 390 – 1800pF / 50 – 500V VM4756Y – 4759 680 – 27000 / 50 – 500V (Kool-MU, Powdered Iron, MMP Cores available)
LPT-4545
11 L REFLECTION Inductors reflect noise back to the source.Very effective for low impedance lines.
POWER LINE SIGNAL LINE
TOROIDAL INDUCTORS TOROIDAL INDUCTORS
Type-Dimension (DxH) Inductance / IDC (amps) Type–Dimension(DxH) Inductance / IDC (amps)
TJ3–1U/2U TJ/TD3 through TJ/TD9 16.5 x 7.6 mm(V) 1.2 – 1500µH (Toroidal inductors for signal line use 16.8 x 8.1 mm(H) 10 – .5A are identical to those for power line use. TJ4–1U/2U Refer to data at left.) 22.4 x 10.2 mm(V) 1.2 – 1500µH 22.4 x 10.2 mm(H) 10.7 – .9A TJ3 TJ5–1U/2U 25.4 x 11.4 mm(V) 1.2 – 1500µH TOROIDAL FILTER INDUCTORS 25.4 x 11.4 mm(H) 10.1 – 1.3A ENCAPSULATED RMV05 TJ6–1U/2U Type–Dimension (L x H) Inductance 35.1 x 21.1 mm(V) 1.2 – 2700µH TE–3 50µH – 4H 35.1 x 21.1 mm(H) 16 – 2A .685 x .385 in TJ7–1U/2U TE–4 150µH – 2H 41.9 x 19.1 mm(V) 1.2 – 2700µH 1.06 x .500 in 41.9 x 19.1 mm(H) 16 – 27.A TE–5 1mH – 2H 1.32 x .725 in TJ8–1U/2U 48.8 x 25.4 mm(V) 1.5 – 3900µH 49.3 x 25.4 mm(H) 18.5 – 3.2A TJ9–1U/2U DIPPED DDNL0409 67.6 x 36.1 mm(V) 1.5 – 5600µH Type–Dimension(LxWxH) Inductance 69.1 x 36.1 mm(H) 20 – 5A TD–3 50µH – 4H 1U = Vertical Mount 2U = Horizontal Mount .685 x .320 x .685 in TD–4 150µH – 2H TE 1.06 x .437 x 1.06 in TD–5 1mH – 2H 1.32 x .688 x 1.32 in
Core Materials: Q0 = highest DCR HIGH CURRENT INDUCTORS IHD–1 Q1 = low DCR1 – 18,000µH 6.8 x 17.8Q4 mm= lowest5.3 DCR – .08A Type–Dimension Inductance / IDC IHD-1 IHD–1 1 – 18,000µH 6.8 x 17.8 mm 5.3 – .08A
IHD–3 3.9 – 100,000µH AXIAL MOLDED INDUCTORS 11.7 x 22.3 mm 4 – .07A TD Type–Dimension Inductance H Series IM–1 2 x 5 mm .1 – 100µH IM–2 2.4 x 6.4 mm .022 – 1000 µH IM–4 3.9 x 9.4 mm .15 – 1800µH IM–6 4.8 x 11.2 mm .1 – 1000µH IM–8 5.4 x 14.2 mm 1100 – 3600µH IM-4 IM–9 6.3 x 14.2 mm 68 – 150µH IM–10 6.1 x 18.7 mm 3900 – 10,000µH
SHIELDED MOLDED INDUCTORS
Type–Dimension Inductance
IMS–2 2.5 x 6.4 mm .1 – 560µH IMS-2 IMS–5 4.1 x 10.4 mm .1 – 100,000 µH
12 ELECTRO-MAGNETIC COMPATIBILITY
EMC LEADED DEVICES POWER LINE AND SIGNAL LINE USE
C BYPASS Noise elements in the signals are shunted to ground and prevented from entering the load. Very effective for high impedance lines.
POWER LINE SIGNAL LINE
LEADED VARISTOR RFI CAP POLYPROPYLENE MULTILAYER CERAMIC RADIAL DIPPED NPO CAPACITORS Type–Dimension (DxL) AL (VRMS) Type Capacitance / VDC .01 – .68 / 400V Type (HxW) Lead Space Capacitance/ VDC RMV05 7 x 5 mm 250 – 300V MKP1842 RMVO7 9 x 5 mm 250 – 300V MKP1842 MKP1844 .01 – 1.0 / 400V VP31 4 x 4mm 2.54 1 – 1800 RMV10 12.5 x 5.2 mm 250 – 300V F1778–X2 .01 – 2.2 / 275V 50 – 100VDC RMV14 16.5 x 6 mm 250 – 300V F1779–X2 .01 – 2.2 / 305V VP32 5.1 x 5.1 mm 2.54 10 – 10000 RMV18 20.5 x 6 mm 250 – 300V .01 – 2.2 / 275V 50 – 100V .01 – 2.2 / 305V VP40 4 x 4mm 5.08 1 – 1800 VP31 50 – 100V VP41 5.1 x 5.1 mm 5.08 1 – 10000 FEED THROUGH FILTERS 50 – 100V RFI CAP POLYESTER FILM Type – Class (DxL) Capacitance / VDC VP43 6.8 x 6.5 mm 5.08 680 – 18000 Type – Class Capacitance / VDC 50 – 100V DDNL0409–2 4.3 x 9 mm 1600 / 400V F1710 –Y2 .001 – .1 / 250V VP44 7.6 x 7.6 mm 5.08 6800 – 56000 DDM20312–2 3 x 12 mm 5000pF / 200V F1710–X1Y2 .001 – .1 / 305V 50 – 100V DDML04... 4.3 x 9–20 mm 1600– 7000pF/ 400V F1712 –Y2 .001 – .1 / 250V VP52 5.1 x 6.8 mm 7.62 820 – 10000 50 – 100V F1772 –X2 .01 – 2.2 / 275V .01 – 2.2 / 300V F1772 F1773 –X2 .01 – 1.0 / 440V HIGH VOLTAGE DISK CAPACITORS F1774 –X2 .01 – 2.2 / 253V MULTILAYER CERAMIC RADIAL DIPPED Type Capacitance / VDC .01 – 2.2 / 275V X7R CAPACITORS .01 – 1.0 / 440V HA 47pf – .022uf / 1KV Type (HxW) Lead Space Capacitance/ VDC F1722 –X1 HB 56pf – .022uf / 2KV .01 – .47 / 440V F1724 –X1 VP31 4 x 4 mm 2.54 100 – 150000 HC 68pf – .015uf / 3KV .01 – .47 / 440V 25 – 100V HD 33pf – 4700pf / 4KV VP32 5.1 x 5.1mm 2.54 1000 – 820000 HF 56pf – 6800pf / 6KV 25 – 100V HG 100pf – 2200pf / 8KV RFI CAP PAPER VP31 VP40 4 x 4 mm 5.08 100 – 100000 HH 100pf – 1200pf / 10KV Type – Class Capacitance / VDC 25 – 100V HI 100pf – 820pf / 15KV F1740–15 – X1 .0068 – .47uF / 275V VP41 5.1 x 5.1mm 5.08 100 – 820000 50 – 100V F1740 F1740–35 – X1Y2 .022 – .47µH / 275V +2X (2700pF –.027uF) / 275V VP43 6.5 x 6.8mm 5.08 22000 – 1500000 50 – 100V F1740–55 – X1Y2 .022 – .47 / 275V +2X (2400pF – .027uF) / 275V VP44 7.6 x 7.6mm 5.08 220000 – 2000000 50 – 100V VP52 5.1 x 6.8mm 2.62 12000 – 220000 50 – 100V RX RFI CAP CERAMIC
Type – Class Capacitance / VDC
W1X – X1 4700pF–.22uF / 275V
RFI CAP CERAMIC – SAFETY DISC
Type Capacitance / VDC (Class)
WYO-102 WYO 1000pF – .22uF / 250 (Y2)
VKO 1000 – 4700pF / 440 (X1) / 250 (X2) WKO 33 – 4700pF / 440 (X1) WKO-101 / 250 (Y2) VKP 470 – 4700pF / 760 (X1) / 500 (Y1) WKP 33 – 4700pF / 440 (X1) / 250 (Y1)
WKP-472
Note: Case sizes are listed in EIA standard sizes. Unless stated otherwise, case sizes use inches: e.g., 0805 equals .08 in long by .05 in wide.
13 GLOSSARY OF TERMS
AF Audio Frequency. Components of signal or noise having fre- FCC Federal Communications Commission. Mission: to manage the quencies in the 15Hz–20kHz range. spectrum and provide leadership in order to create new opportunities for competitive technologies and services for the American public. ANSI American National Standards Institute Website: http://www.fcc.gov.com ANSI/IEEE C95.1-1992 Recommendation for limits of maximum Ferrites Powdered magnetic (permeable) material in the form of human exposure to radiated fields. beads, rods and blocks used to absorb EMI on wires and cables. Case Size The physical size of a component. Vishay sizes are usual- Ferrites convert the associated EMI magnetic-flux density into heat. ly included in the part number. “0805” means the device is .08″ long Ferrite Beads A ferrite core with a conductor passing through the and .05″ wide. The case size is usually followed by the parts value. ferrite (as opposed to wrapping the wire aroune the ferrite). These Capacitor A passive component whose reactance, Xc= 1⁄2πf, decreas- devices resemble a bead in a necklace. Ferrite beads are also available es with frequency at 20 dB/decade. in a surface mount package. Capacitors, Feed Through Single-stage capacitors that are bulkhead Harmonic An integer multiple of the fundamental frequency. mounted to provide low insertion inductance. HF High frequency: frequency ranging from 3 MHz to 30 MHz. CCIR International Radio Consultative Committee IEC International Electrotechnical Commission CE Mark European product compliance (conformity) mark IEEE Institute of Electrical and Electronic Engineers Certification (FCC) A procedure that requires submittal of a written IEEE/EMC The EMC Society (professional group) within the IEEE. application to the FCC that includes an application form 731, fee, complete technical description of the product and a measurement Impedance The vector sum of resistance and reactance at any spec- report showing compliance with the FCC technical standards. ified frequency, where the reactance corresponds to that of an induc- tor or capacitor, as applicable. Characteristic Impedance The equivalent circuit of a transmission line, Zo, defining if lossy and reactive properties: Inductor A passive component whose reactance, XL= 1⁄2πf, increases
For ELF/VLF: ZO = √ R/G ohms with frequency at 20 dB/decade. For frequencies > 10 kHz: ZO = √L/C ohms Inductors and Coils Discrete devices used to pass low-frequency Chip Bead A generic term for a ferrite component (“bead”) that is and reject high-frequency EMI. Often used in filters, safety-ground produced in a surface mount package. A chip bead already has an lines with ferrites and oscillator tank circuits. internal conductor inside, so no additional parts are necessary to I/O input/output (port or cable) make the component work. LF Low frequency: frequency ranging from 30 kHz to 300 kHz. This Common Mode When applied to two or more wires, all currents includes many navigation bands, including Loran. flowing therein which are in phase. Maximum DC Resistance The maximum value of resistance (how DC Current Rating The maximum amount of direct current that can much opposition there is to current flow) that will be exhibited by safely pass through the component. the device. DC/DC Converters These devices are used in DC power-distribu- MOV Metal-Oxide Varistor tion, and convert DC voltage from one level to another DC level. Radio Frequency In the ANS/IEEE, Standard 1001984, the term is Differential Mode On a wire pair when the currents are of opposite commonly used to cover the frequency range from 10 kHz to 1000 GHz. polarity. RFI Radio Frequency Interference. Exists when either the transmit- EMC Electro-Magnetic Compatibility. The practice of building elec- ter or receiver has an antenna, causing undesired interference with tronic devices so that they do not create (or are susceptible to) other equipment or systems. EMI/RFI. SMD Surface Mount Device. An electronic component without wire- EMI When an electrical disturbance from natural phenomena or an type external leads; the solder terminals are built as an integral part electrical/electronics device or system causes an undesired response of the component. in another. Surge A sudden voltage increase on the power mains. ESD An electrostatic discharge with a fast risetime, intensive discharges from humans, clothing, furniture and other charged Transformer A device for changing the voltage of electrical energy. dielectric sources.
14 ELECTRO-MAGNETIC COMPATIBILITY
EMI REGULATIONS
EQUIPMENT INFORMATION JAPAN UNITED STATES EUROPE
Generic Standard IEC61000-6-3 EN50081-1 IEC61000-6-4 EN50081-2
ITE (Information CISPR Pub. 22 VCCI Electrical Appliance FCC Part 15 EN55022 technology*) Regulation Subpart B
ISM (microwaves) CISPR Pub. 11 Electrical Appliance Regulation ECC Part 18 EN55011
Igniters (autos, CISPR Pub. 12 JASO FCC Part 15 Automotive Directive motorboats) Subpart B
Radio, TV, CISPR Pub. 13 Electrical Appliance Regulation FCC Part 15 EN55013 audio, VTR Subpart B
Household electrical, CISPR Pub. 14 Electrical Appliance Regulation EN55014 EMISSION portable tools
Fluorescent lamps, CISPR Pub. 15 Electrical Appliance Regulation EN55015 luminary
Transceiver CCIR Radio Act FCC Part 15 Subpart C ETS300 Series FCC Part 22
Power supply IEC555 Industry Voluntary Regulation EN60555 higher harmonte IEC61000-3 EN61000-3
Basic Standard IEC61000-4 (JIS regulation pending) EN61000-4 Series
Generic Standard IEC61000-6-1 (JIS regulation pending) EN50082-1 IEC61000-6-2 EN50082-2
Industry process IEC801 series Industry Voluntary Action measurement & control
IMMUNITY Radio, TV CISPR Pub. 20 Industry Voluntary Action EN55020
ITE (Information CISPR Pub. 24 Industry Voluntary Action EN55024 technology)
*printers, personal computers, word processors, displays
NOISE DETECTION
CISPR PUB 22 VCCI FCC PART 15 EN55022
ITEM MEASURED: Radiated Radiated Mains interference Radiated Mains interference Mains interference interference interference voltage interference voltage voltage
POLARIZATION & Horizontal Pol. Horizontal Pol. AC Mains Ports Horizontal Pol. AC Mains Ports AC Mains Ports MEASURING POINT: / Vertical Pol. / Vertical Pol. / Vertical Pol.
FREQUENCY (Hz): 30M to 1GHz 30M to 1GHz 150k to 30MHz* 30M to 1GHz 450k to 30MHz 150k to 30MHz
DETECTION: Quasi-Peak Quasi-Peak Quasi-Peak, Quasi-Peak, Quasi-Peak Quasi-Peak, Mean Mean Mean
MEASURING Antenna Dipole Artificial Mains Antenna Artificial Mains Artificial Mains DEVICE: antenna Network Network Network
*for 150kHz to 526.5kHz, design targets only at this time
Specifications are subject to change without notice. All details in printed form are legally binding especially with respect to the provisions of §§463 and 480 II of the German Code of Civil Law after written confirmation only. The data indicated herein described the type of component and shall not be considered as assured characteristics. The products listed in this catalog are not generally recommended for use in life support systems where a failure or malfunction of the compo- nent may directly threaten life or cause injury. The user of products in such applications assumes all risks of such use and will agree to hold Vishay Intertechnology, Inc. and all the companies whose products are represented in this catalog, harmless against all damages. © 2000 Copyright Vishay Intertechnology, Inc. ® Registered Trademarks of Vishay Intertechnology, Inc. All rights reserved. Printed in the United States. 15 Specifications subject to change without notice.