IGBT Snubber Capacitors for Power Electronics The Ultimate In Reliability ! Low Inductance to 12 nano Henries ! High DV / DT ! Low ESR ! Low Loss Polypropylene Dielectric ! UL 94 V-0 Flame Retardant Case and Resin ! Wide Selection of Terminal Configurations CAT 9 Revision A 167 John Vertente Boulevard, New Bedford, MA 02745 USA Tel: (508) 994-9661 Fax: (508) 995-3000 E-Mail: sales@aerovox.com Web Site: www.aerovox.com 1 Why Use Snubber Capacitors? General Description With the evolution of power technology, new higher speed Insulated Gate Bipolar Transistors (IGBTs) make it possible for high power converters to operate up to 10 kHz or more. IGBTs are replacing the slower Darlington transistors, simplifying circuit design and reducing cost. IGBT power modules are now being designed into AC and DC motor drive inverters, uninterruptible power systems, electric vehicles and alternate energy production systems. Power systems containing IGBTs must be designed so the transient voltages caused by the hi di/dt that occurs at gate turn off is minimized. Left uncontrolled, this transient voltage can exceed the blocking voltage rating of the IGBT and cause it to fail. To reduce the transient voltage, either di/dt or the parasitic DC bus inductance of the power circuit must be reduced. This is best achieved by decoupling the parasitic bus inductance using a noninductive wound film capacitor mounted as near as possible to the IGBT module terminals. Snubber capacitors, constructed of polypropylene film dielectric and dual metallized film electrodes, are the optimal capacitor design for IGBT applications. While film/foil capacitors are often used because of their superior current carrying capability, they fail in a short circuit mode, which may cause damage to the IGBT module. Aerovox's snubber capacitors combine high current carrying capability with low inductance, low dielectric losses and capacitance stability across a wide frequency range. They offer the self-healing property of metallized film (not failing in a short circuit mode) with the high peak current carrying capability (dv/dt) of film/foil construction. Aerovox's snubber capacitors, manufactured with polypropylene fim and dual metallized electrodes, available with direct IGBT module terminals, radial wire leads, or a unique printed circuit board dual in-line pin mount, provide the highest electrical performance of any snubber capacitors currently available. Dielectric: Polypropylene film with self-healing dual metallized electrodes. Enclosure: UL 94V-0 flame-retardant plastic case and resin. Marking: Ink stamped with Aerovox, part number, capacitance value, nominal DC voltage, and date code, at a minimum. Terminals: Tinned copper, terminal sizes and styles are specified in outline drawings on page 4. Electrical Characteristics Capacitance: Values from 0.1 uf to 3 uf are available at 10% tolerance measured at 1kHz, 25C. Voltage: Available at 630, 1000, 1250, and 1600 VDC as standard ratings. Temperature: -40C to +85C. From 85 to 105C derate DC voltage 1% / C, AC voltage 1.5% / C. Dissipation Factor: <0.1% at 1 kHz, 25C Insulation Resistance: >100,000 megohms x f at 100 VDC measured after 2 minutes. Equivalent Series Resistance (ESR): Refer to RBPS tables. Dielectric Strength: Capacitors will withstand 1.6 x rated voltage for a period of 60 seconds. Capacitance Change with Temperature: (-250 ppm 100 ppm) / C. Equivalent Series Inductance (ESL): This value is determined by the terminal option selected and is measured at the resonant frequency refer to Table below. Equivalent Series Inductance (ESL) Terminal Style Maximum Inductance nonoHenries Radial Lead 2L 30 Circuit Mounted, 2 pins per side 2P 15 Circuit Mounted, 3 pins per side 3P 15 Circuit Mounted, 4 pins per side Direct Mounted, 22 to 31 mm Centers Direct Mounted, 39 to 48 mm Centers 4P 15 B1 20 B2 20 Terminal Description Standard ratings shown, other ratings available consult factory 167 John Vertente Boulevard, New Bedford, MA 02745 USA Tel: (508) 994-9661 Fax: (508) 995-3000 E-Mail: sales@aerovox.com Web Site: www.aerovox.com Ripple Current: The Maximum Rms current is the maximum current flowing through the capacitor at an ambient temperature of 55C. This value changes with temperature as shown in the following diagram. Resistance to Solder Heat: Test Conditions Solder Temperature Test Duration Performance Requirements: Capacitance 260C 5.0C 10 seconds 1 s Delta of < 2.0% Accelerated Pulse Handling Capability: Test Conditions A capacitor under test will be charged through an impedance of a magnitude greater than the discharging impedance. The capacitor under test will be charged to the rated DC voltage and discharged through an impedance capable of producing a minimum voltage gradient with time (DV/DT). The test will be performed in accordance with the requirements for the voltage gradient multiplier and charge and discharge cycles as listed below. Voltage Gradient Multiplier Test Cycles 6x 100 4x 1000 2x 1 million Test Specifications Accelerated Life: Test Conditions DC Temperature Applied Voltage Test Duration 85C 5.0C 1.25 x rated VDC 1,000 hours Performance Requirements: Capacitance Delta of <5.0% ESR < 125% of initial limit Insulation Resistance >50% of initial limit Example: An RBPS part rated 1.0 uF 1,000 VDC has a DV/DT rating of 600 volts per microsecond. This part would be capable of withstanding 100 cycles at a minimum of 3,600 volts/microsecond, 1000 cycles at 2,400 volts/microsecond, or 1 million cycles at 1,200 volts/microsecond. Performance Criteria After Testing Capacitance Delta < 3% ESR Absolute value < 150% of original measured value Part Numbering System Configuration Humidity: Test Conditions Temperature Applied Voltage Humidity Test Duration Performance Requirements: Capacitance Insulation Resistance ESR 2 40C 3.0C Zero Voltage 93% 5% RH 500 hours Delta of < 3.0% 10% of initial limit <125% of initial limit Standard ratings shown, other ratings available consult factory 167 John Vertente Boulevard, New Bedford, MA 02745 USA Tel: (508) 994-9661 Fax: (508) 995-3000 E-Mail: sales@aerovox.com Web Site: www.aerovox.com Type RBPS Voltage Code 63 - Rated 630 VDC (400 VAC @ 60 Hz) ESR Max @100kHz mOhms 9 0.33 334 C7 600 200 Irms Max Amps @55C 10.9 0.39 394 C7 600 235 11.5 9 B, G, I, J 0.47 474 C7 550 235 12.2 8 B, G, I, J 0.56 564 C7 500 280 13.0 8 B, G, I, J 0.68 684 C7 450 300 14.0 8 B, G, I, J 0.75 754 C7 400 300 15.0 8 B, G, I, J 0.82 824 B7 400 330 16.0 8 B, G, I, J 1.00 105 B7 400 400 18.0 7 B, G, I, J 1.20 125 A7 400 480 19.0 7 C, G, I, J 1.50 155 A7 400 600 12.0 7 C, G, I, J 1.75 175 A7 400 700 21.0 7 C, G, I, J 2.00 205 A7 400 800 22.0 7 C, G, I, J 2.20 225 R4 280 615 24.0 7 C, G, H 2.50 255 R4 250 625 26.0 7 C, G, H 3.00 305 R4 250 750 28.0 7 C, G, H 4.0 405 R5 250 1000 30.0 6 D, G, H 5.00 505 R5 250 1250 35.0 6 D, G, H Capacitance (f) Code Case Code DV/DT V/ sec Ipeak Amps Terminal Codes B, G, I, J Type RBPS Voltage Code 91 - Rated 1000 VDC (530 VAC @ 60 Hz) 0.22 224 W0 1000 220 Irms Max Amps @55C 6.6 0.27 274 C7 700 245 10.0 12 B, G 0.33 334 C7 700 300 10.9 10 B, G 0.39 394 C7 700 310 11.5 9 B, G 0.47 474 C7 700 375 12.2 8 B, G 0.56 564 B7 700 450 14.0 8 B, G 0.68 684 B7 700 450 15.0 8 C, G 0.75 754 B7 700 525 15.0 8 C, G 0.82 824 A7 600 490 17.2 8 C, G 1.00 105 A7 600 600 18.4 7 C, G 1.20 125 A4 500 600 18.5 7 C, G 1.50 155 R4 500 750 21.7 7 C, G, H 1.75 175 R4 500 875 22.0 7 C, G, H 2.00 205 R4 450 900 22.5 7 C, G, H 2.20 225 R5 450 990 26.0 7 D, G, H 2.50 255 R5 400 1000 27.0 7 D, G, H 3.00 305 R5 400 1200 30.0 6 D, G, H Capacitance (f) 3 Code Case Code DV/DT V/ sec Ipeak Amps ESR Max @100kHz mOhms 12 Terminal Codes A Standard ratings shown, other ratings available consult factory 167 John Vertente Boulevard, New Bedford, MA 02745 USA Tel: (508) 994-9661 Fax: (508) 995-3000 E-Mail: sales@aerovox.com Web Site: www.aerovox.com Type RBPS Voltage Code 92 - Rated 1250 VDC (550 VAC @ 60 Hz) Capacitance (f) Code Case Code DV/DT V/ sec Ipeak Amps Irms Max Amps @55C 5.7 ESR Max @100kHz mOhms 16 Terminal Codes 0.10 104 W0 1200 120 2L 0.15 154 C7 1000 150 8.9 15 B, G, I, J 0.22 224 C7 1000 220 10.0 12 B, G, I, J 0.27 274 C7 900 245 11.0 12 B, G, I, J 0.33 334 C7 800 265 12.0 10 B, G, I, J 0.39 394 B7 770 300 14.0 9 B, G, I, J 0.47 474 B7 650 305 17.0 8 B, G, I, J 0.56 564 A7 650 365 17.5 8 C, G, I, J 0.68 684 A7 650 440 20.0 8 C, G, I, J 0.75 754 A7 650 490 20.0 8 C, G, I, J 0.82 824 A7 650 530 21.0 8 C, G, I, J 1.00 105 A7 650 650 22.0 7 C, G, I, J 1.20 125 R4 550 660 25.0 7 C, G, H 1.50 155 R4 500 750 26.0 7 C, G, H 1.75 175 R5 500 875 27.0 7 D, G, H 2.00 205 R5 475 950 28.0 7 D, G, H 2.20 225 R5 475 1045 30.0 6 D, G, H Type RBPS Voltage Code 96 - Rated 1600 VDC (630 VAC @ 60 Hz) 0.10 104 W0 1200 120 Irms Max Amps @55C 5.7 0.15 154 C7 1000 150 8.9 15 B, G 0.22 224 C7 1000 220 10.0 12 B, G 0.27 274 B7 850 230 12.0 12 B, G 0.33 334 B7 850 280 13.4 10 B, G 0.39 394 A7 850 330 16.0 9 C, G 0.47 474 A7 850 400 17.2 8 C, G 0.56 564 A7 850 475 17.5 8 C, G 0.68 684 R4 700 475 20.0 8 C, G, H 0.75 754 R4 600 450 20.5 8 C, G, H 0.82 824 R4 600 490 21.0 8 C, G, H 1.00 105 R4 600 600 21.7 7 C, G, H 1.20 125 R4 600 720 26.0 7 D, G, H 1.50 155 R5 600 900 28.0 7 D, G, H Capacitance (f) 4 Code Case Code DV/DT V/ sec Ipeak Amps ESR Max @100kHz mOhms 16 Terminal Codes A Standard ratings shown, other ratings available consult factory 167 John Vertente Boulevard, New Bedford, MA 02745 USA Tel: (508) 994-9661 Fax: (508) 995-3000 E-Mail: sales@aerovox.com Web Site: www.aerovox.com Case Codes and Dimensions 5 Case Code T H L P Case Code W0 C7 B7 13.0 17.0 22.1 22.0 28.0 30.1 32.1 42.7 42.7 27.5 35.0 35.0 A7 R4 R5 T H L 28.2 37.3 42.7 29.2 41.2 58.5 46.0 36.0 58.7 Dimensions are in mm P 35.0 52.0 52.0 Standard ratings shown, other ratings available consult factory