Film PRODUCTS Snubber Capacitors for IGBT Modules Why Choose KEMET Programs Supported KEMET applies world-class service and quality to deliver industry-leading, high performance capacitance solutions worldwide. With 95% of possible dielectric solutions, KEMET offers the world’s most complete line of surface mount and through-hole capacitor technologies across tantalum, ceramic, film, aluminum and paper dielectrics. One world. One KEMET. Power semiconductor snubbing, including IGBT direct mount Steps for Choosing an IGBT Snubber Capacitor to Test 1. Choose the snubber voltage to match (or exceed) the IGBT voltage. 2. Choose an initial capacitance value using the diagram below. 3. Choose a tab style code from the diagrams on the reverse side. 4. Choose the desired part number from the datasheet. The tab style code is digit 13. Example: C4BSNBX4200ZALJ is tab style A. IGBT with screw connections Product Checklist • Does the IGBT module have screw or pin connections? • What is the actual IGBT current? • Will the snubber capacitor be used by itself or in a network with other components? • What is the rated voltage of the IGBT? Snubber in network • Wide capacitance & voltage range • Direct mount version with six tab styles to fit most IGBTs • 4-pin PCB mount version available • Stable temperature characteristics • Pb-free/RoHS-compliant • Made with low-loss polypropylene film Snubber by itself Features & Benefits Series C4BS direct mount Series C4AS PC board mount Cap value = 0.5 µF per 100 A IGBT current (1.0 µF per 100 A if high inductance expected) Cap value = 0.25 µF per 100 A IGBT current IGBT with pin connections Series C4AS PC board mount Series C4AS PC board mount Cap value = 0.5 µF per 100 A IGBT current (1.0 µF per 100 A if high inductance expected) Cap value = 0.25 µF per 100 A IGBT current This is a starting point. The engineer will pick the final cap value after evaluation and testing. Snubber capacitor by itself Snubber capacitor in a network KEMET Products Capacitor Type Rated Voltage Cap Range Characteristics C4AS Radial Leads 850 VDC/500 VAC 0.15 – 5.0 µF • Snubber applications 1000 VDC/600 VAC 0.15 – 4.7 µF • Climatic category (IEC 60068-1) 40/85/56 1200 VDC/630 VAC 0.1 – 3.5 µF • Pulse rise time (dv/dt) 469 to 3360 V/µs 2000 VDC/700 VAC 0.033 – 1.5 µF • Pitch (p) p = 27.5, 37.5, 52.5 mm 3000 VDC/750 VAC 0.022 – 0.82 µF • Terminals tinned copper 2 or 4 wires 850 VDC/550 VAC 0.47 – 5.0 µF • Snubber-IGBT applications 1000 VDC/600 VAC 0.47 – 4.0 µF • Climatic category (IEC 60068-1) 40/85/56 1200 VDC/630 VAC 0.33 – 3.3 µF • Pulse rise time (dv/dt) 469 to 3361 V/µs 2000 VDC/700 VAC 0.10 – 1.5 µF • Box Length (L) L = 32 to 57.5 mm 3000 VDC/750 VAC 0.047 – 0.82 µF • Terminals tinned brass lugs C4BS Direct Mount For more information, samples and engineering kits, please visit us at www.kemet.com or call 1.877.myKEMET. SA0912 Copyright © 2012 KEMET Film PRODUCTS Snubber Capacitors for IGBT Modules Application of C4B Tab Styles The tab style code is digit 13 in the part number. Example: C4BSNBX4200ZALJ is tab style A General description of tab styles. Also see detailed diagrams below. Sugg. tabs for common IGBTs (always check specific cases). Tab Styles Cap Length Pitch Range Notes IGBT Mfr Series A 41.5 - 42.5 mm 21.5 - 29.5 mm Fits most common IGBTs Semikron SKM B 41.5 - 42.5 mm 16.0 - 28.0 mm Fits most common IGBTs Semikron Skiip® H 41.5 - 42.5 mm 21.5 - 29.5 mm Alternative to “A” with lower mounting height Powerex/Mitsubishi CM up to 300 A, B, H 57.5 mm Larger pitches for high power IGBTs, see diagram below Powerex/Mitsubishi CM 400 & up E B = 18 mm For the Semikron Skiip® module, 31 mm terminals Infineon/Eupec BSM F Specialty type on demand, see diagram below Microsemi APT G Specialty type on demand, see diagram below Above applies to cap length 41.5 - 42.5 mm or B=18 mm for tab style E. SA0912 31 mm A B E H Copyright © 2012 KEMET