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
5.004
Pulse, Hi-Frequency
& Snubber
Capacitors
CORNELL
DUBILIER
Your Source For Capacitor Solutions
Type SCM, Single/Dual IGBT Snubber Capacitor Modules
Applications
Use style SCM as a discharge restrictive de-cou-
pling to protect dual IGBT modules from over volt-
age, 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.
Highlights
• Mount directly to the IGBT module
• Low inductance
• Low Loss
• Hyperfast diodes integrated into package
•
1 or 2 wire taps for connecting exter nal resistor
•
Flame resistant case and epoxy, meets UL 94VO
•
Other ter minal pitches and capacitance values
available.
Dischar ge Restrictive De-coupling
The circuit in Figure 1 operates on the same prin-
ciples as the de-coupling capacitor, but only dur-
ing tur n-off switching. As the IGBT tur ns off, ener-
gy 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 exter nal resistor.
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 snub ber caps
that were fully charged to bus voltage have a dis-
charge path through the forward biased free-wheel
diode, the IGBT, and the snubber resistors. This
reduces the reverse recover y voltage transient.
External
Resistor
SCM
"N" Type
Module
Dual
IGBT
Module
Figure 1
Style SCM Discharge restrictive decoupling used
to protect dual IGBT modules
Single
IGBT
Module
SCM
"P" Type
Module
External
Resistors
SCM
"N" Type
Module
Single
IGBT
Module
Figure 2
Style SCM “P”type and “N”type used as a clamp
to protect an inver ter using two “single”IGBT modules.
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 5.005
Pulse, Hi-Frequency
& Snubber
Capacitors
CORNELL
DUBILIER
Your Source For Capacitor Solutions
Type SCM, Single/Dual IGBT Snubber Capacitor Modules
P
UL1015 AWG18
L= 200 mm min.
15mm
8mm
5mm
16mm
7mm dia
CE
LW
H
CE
R
CE
R
P TYPE N TYPE
Specify “N” type or “P” type
Typical Application Ipk(A),T c = 25 °C
IGBT Module Diode Repetitive
Cap Ic/Vce Characteristics Ipk(A) Surge 20 kHz Dimensions (in.)
Part Number µF
S=Single, D=Dual
Vrrm/If/trr(µs) Tc = 25°C Sq W ave
W L H P(mm)
SCM474K601H7N29 0.47 200S-300S/600 600/30/<.040 300 70 1.725 2.200 1.340 29
SCM474K601H7P29 0.47 200S-300S/600 600/30/<.040 300 70 1.725 2.220 1.340 29
SCM105K601H7[ ]24 1.0 100D-200D/600 600/30/<.040 300 70 1.500 1.875 1.250 24
SCM105K601H5[ ]29 1.0 300S-400S/600 600/50/<.045 500 100 1.825 2.225 1.500 29
SCM155K601H7N24 1.5 200D-300D/600 600/30/<.040 300 70 1.350 2.200 1.200 24
SCM155K601H7P24 1.5 200D-300D/600 600/30/<.040 300 70 1.500 1.875 1.250 24
SCM205K601H5[ ]24 2.0 300D-400D/600 600/50/<.045 500 100 1.725 2.220 1.340 24
SCM205K601H2[ ]29 2.0 400S-600S/600 600/100/<.050 1000 200 1.825 2.225 1.500 29
SCM474K122H8N29 0.47 200S-300S/1200 1200/30/<.065 300 60 1.350 2.200 1.200 29
SCM474K122H8P29 0.47 200S-300S/1200 1200/30/<.065 300 60 1.500 1.875 1.250 29
SCM105K122H8[ ]24 1.0 100D-200D/1200 1200/30/<.065 300 60 1.750 2.500 1.470 24
SCM105K122H4N29 1.0 300S-400S/1200 1200/50/<.085 500 100 1.725 2.200 1.340 29
SCM105K122H4P29 1.0 300S-400S/1200 1200/50/<.085 500 100 1.825 2.225 1.500 29
SCM155K122H8N24 1.5 200D-300D/1200 1200/30/<.065 300 60 1.750 2.500 1.470 24
SCM155K122H8P24 1.5 200D-300D/1200 1200/30/<.065 300 60 1.825 2.225 1.500 24
SCM205K122H4[ ]24 1.5 300D-400D/1200 1200/50/<.065 500 100 2.125 2.500 1.700 24
SCM205K122H1[ ]29 2.0 400S-600S/1200 1200/100/<.090 1000 200 2.125 2.500 1.700 29
