Type SCM Single/Dual IGBT Snubber Capacitor Modules Applications Use style SCM as a discharge restrictive de-coupling to protect dual IGBT modules from overvoltage, Figure 1. Style SCM may also be used as an “N” or “P” type snubber component for a clamp snubber where single IGBT modules are used, Figure 2. Complies with the EU Directive 2002/95/EC requirement restricting the use of Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent chromium (Cr(VI)), PolyBrominated Biphenyls (PBB) and PolyBrominated Diphenyl Ethers (PBDE). Highlights • Mount directly to the IGBT module • Low inductance • Low Loss • Hyperfast diodes integrated into package Discharge Restrictive De-coupling The circuit in Figure 1 operates on the same principles as the de-coupling capacitor, but only during turn-off switching. As the IGBT turns off, energy trapped in the loop inductance is transferred to the capacitor. The diode blocks oscillations from occurring and excess charge on the capacitor is discharged through the external resistor. Figure 1 Style SCM Discharge restrictive decoupling used to protect dual IGBT modules External Resistor Dual IGBT Module SCM “N” Type Module • 1 or 2 wire taps for connecting external resistor • Flame resistant case and epoxy, meets UL 94V0 • Other terminal pitches and capacitance values available. RCD Clamp The function of this snubber is similar to a clamp, Figure 2. At turn-off, the snubber diode is forward biased and the snubber is activated. The energy trapped in the stray inductance is absorbed by the snubber capacitor. During turn-on the snubber caps that were fully charged to bus voltage have a discharge path through the forward biased free-wheel diode, the IGBT, and the snubber resistors. This reduces the reverse recovery voltage transient. Figure 2 Style SCM “P” type and “N” type used as a clamp to protect an inverter using two “single” IGBT modules Single IGBT Module Single IGBT Module SCM “P” Type Module External Resistor SCM “N” Type Module CDE Cornell Dubilier•1605 E. Rodney French Blvd•New Bedford, MA 02744•Phone: (508)996-8561•Fax: (508)996-3830•www.cde.com Type SCM Single/Dual IGBT Snubber Capacitor Modules W Max. L Max. H Max. C E 5 mm 16 mm UL 1015 AWG 18 L = 22 mm min 8 mm 15 mm P ±1.0 mm 7 mm dia Ratings Typical Application Diode Characteristics IGBT Module Catalog Ipk Ipk Vrrm If Trr surge rep (V) (A) (µs) (A) (A) Dimensions Cap S=Single Ic Vce W Part Number (µF) D=Dual (A) (V) Type SCM474K601H7N29-F 0.47 S 200–300 600 N 600 30 0.040 300 70 1.725 43.82 2.200 55.88 1.34 34.04 1.142 29 SCM474K601H7P29-F 0.47 S 200–300 600 P 600 30 0.040 300 70 1.725 43.82 2.200 55.88 1.34 34.04 1.142 29 SCM105K601H7N24-F 1.00 D 100–200 600 N 600 30 0.040 300 70 1.500 38.10 1.875 47.63 1.25 31.75 0.945 24 SCM105K601H7P24-F 1.00 D 100–200 600 P 600 30 0.040 300 70 1.500 38.10 1.875 47.63 1.25 31.75 0.945 24 SCM105K601H5N29-F 1.00 S 300–400 600 N 600 50 0.045 500 100 1.825 46.36 2.225 56.52 1.50 38.10 1.142 29 SCM105K601H5P29-F 1.00 S 300–400 600 P 600 50 0.045 500 100 1.825 46.36 2.225 56.52 1.50 38.10 1.142 29 SCM155K601H7N24-F 1.50 D 200–300 600 N 600 30 0.040 300 70 1.350 34.29 2.200 55.88 1.20 30.48 0.945 24 (in) (mm) L (in) H (mm) (in) (mm) P (in) (mm) SCM155K601H7P24-F 1.50 D 200–300 600 P 600 30 0.040 300 70 1.500 38.10 1.875 47.63 1.25 31.75 0.945 24 SCM205K601H5N24-F 2.00 D 300–400 600 N 600 50 0.045 500 100 1.725 43.82 2.200 55.88 1.34 34.04 0.945 24 SCM205K601H5P24-F 2.00 D 300–400 600 P 600 50 0.045 500 100 1.725 43.82 2.200 55.88 1.34 34.04 0.945 24 SCM205K601H2N29-F 2.00 S 400–600 600 N 600 100 0.050 1000 200 1.825 46.36 2.225 56.52 1.50 38.10 1.142 29 SCM205K601H2P29-F 2.00 S 400–600 600 P 600 100 0.050 1000 200 1.825 46.36 2.225 56.52 1.50 38.10 1.142 29 SCM474K122H8N29-F 0.47 S 200–300 1200 N 1200 30 0.065 300 60 1.350 34.29 2.200 55.88 1.20 30.48 1.142 29 SCM474K122H8P29-F 0.47 S 200–300 1200 P 1200 30 0.065 300 60 1.500 38.10 1.875 47.63 1.25 31.75 1.142 29 SCM105K122H8N24-F 1.00 D 100–200 1200 N 1200 30 0.065 300 60 1.750 44.45 2.500 63.50 1.47 37.34 0.945 24 SCM105K122H8P24-F 1.00 D 100–200 1200 P 1200 30 0.065 300 60 1.750 44.45 2.500 63.50 1.47 37.34 0.945 24 SCM105K122H4N29-F 1.00 S 300–400 1200 N 1200 50 0.085 500 100 1.725 43.82 2.200 55.88 1.34 34.04 1.142 29 SCM105K122H4P29-F 1.00 S 300–400 1200 P 1200 50 0.085 500 100 1.825 46.36 2.225 56.52 1.50 38.10 1.142 29 SCM155K122H8N24-F 1.50 D 200–300 1200 N 1200 30 0.065 300 60 1.750 44.45 2.500 63.50 1.47 37.34 0.945 24 SCM155K122H8P24-F 1.50 D 200–300 1200 P 1200 30 0.065 300 60 1.825 46.36 2.225 56.52 1.50 38.10 0.945 24 SCM205K122H4N24-F 2.00 D 300–400 1200 N 1200 50 0.065 500 100 2.125 53.98 2.500 63.50 1.70 43.18 0.945 24 50 SCM205K122H4P24-F 2.00 D 300–400 1200 P 1200 0.065 500 100 2.125 53.98 2.500 63.50 1.70 43.18 0.945 24 SCM205K122H1N29-F 2.00 S 400–600 1200 N 1200 100 0.090 1000 200 2.125 53.98 2.500 63.50 1.70 43.18 1.142 29 SCM205K122H1P29-F 2.00 S 400–600 1200 P 1200 100 0.090 1000 200 2.125 53.98 2.500 63.50 1.70 43.18 1.142 29 Ipk surge at 25 °C and Ipk repetitive at 25 °C and 20 kHz. CDE Cornell Dubilier•1605 E. Rodney French Blvd•New Bedford, MA 02744•Phone: (508)996-8561•Fax: (508)996-3830•www.cde.com