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. Pulse, Hi-Frequency & Snubber Capacitors Highlights * Mount directly to the IGBT module * Low inductance * Low Loss * Hyperfast diodes integrated into package * 1 or 2 wire taps for connecting external resistor * Flame resistant case and epoxy, meets UL 94VO * Other terminal pitches and capacitance values available. Discharge Restrictive De-coupling RCD Clamp 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. 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 1 Style SCM Discharge restrictive decoupling used to protect dual IGBT modules Dual IGBT Module External Resistor Single IGBT Module SCM "P" Type Module External Resistors SCM "N" Type Module 5.004 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 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: cdenb@cornell-dubilier.com SCM "N" Type Module CORNELL DUBILIER Your Source For Capacitor Solutions Type SCM, Single/Dual IGBT Snubber Capacitor Modules W L H C E 5mm 16mm UL1015 AWG18 L= 200 mm min. 8mm 15mm 7mm dia P Cap F SCM474K601H7N29 SCM474K601H7P29 SCM105K601H7[ ]24 SCM105K601H5[ ]29 SCM155K601H7N24 SCM155K601H7P24 SCM205K601H5[ ]24 SCM205K601H2[ ]29 SCM474K122H8N29 SCM474K122H8P29 SCM105K122H8[ ]24 SCM105K122H4N29 SCM105K122H4P29 SCM155K122H8N24 SCM155K122H8P24 SCM205K122H4[ ]24 SCM205K122H1[ ]29 0.47 0.47 1.0 1.0 1.5 1.5 2.0 2.0 0.47 0.47 1.0 1.0 1.0 1.5 1.5 1.5 2.0 200S-300S/600 200S-300S/600 100D-200D/600 300S-400S/600 200D-300D/600 200D-300D/600 300D-400D/600 400S-600S/600 200S-300S/1200 200S-300S/1200 100D-200D/1200 300S-400S/1200 300S-400S/1200 200D-300D/1200 200D-300D/1200 300D-400D/1200 400S-600S/1200 600/30/<.040 600/30/<.040 600/30/<.040 600/50/<.045 600/30/<.040 600/30/<.040 600/50/<.045 600/100/<.050 1200/30/<.065 1200/30/<.065 1200/30/<.065 1200/50/<.085 1200/50/<.085 1200/30/<.065 1200/30/<.065 1200/50/<.065 1200/100/<.090 300 300 300 500 300 300 500 1000 300 300 300 500 500 300 300 500 1000 70 70 70 100 70 70 100 200 60 60 60 100 100 60 60 100 200 Dimensions (in.) W L H P(mm) 1.725 1.725 1.500 1.825 1.350 1.500 1.725 1.825 1.350 1.500 1.750 1.725 1.825 1.750 1.825 2.125 2.125 2.200 2.220 1.875 2.225 2.200 1.875 2.220 2.225 2.200 1.875 2.500 2.200 2.225 2.500 2.225 2.500 2.500 1.340 1.340 1.250 1.500 1.200 1.250 1.340 1.500 1.200 1.250 1.470 1.340 1.500 1.470 1.500 1.700 1.700 29 29 24 29 24 24 24 29 29 29 24 29 29 24 24 24 29 Specify "N" type or "P" type P TYPE N TYPE R C CORNELL DUBILIER Your Source For Capacitor Solutions R E C 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: cdenb@cornell-dubilier.com E 5.005 Pulse, Hi-Frequency & Snubber Capacitors Part Number Typical Application Ipk(A), Tc = 25C IGBT Module Diode Repetitive Ic/Vce Characteristics Ipk(A) Surge 20 kHz Tc = 25C Sq Wave S=Single, D=Dual Vrrm/If/trr(s)