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.
Highlights
•
Mount directly to the IGBT module
•
Low inductance
•
Low Loss
•
Hyperfast diodes integrated into package
Complies with the EU Directive 2002/95/EC re-
quirement restricting the use of Lead (Pb), Mer-
cury (Hg), Cadmium (Cd), Hexavalent chromium
(Cr(VI)), PolyBrominated Biphenyls (PBB) and
PolyBrominated Diphenyl Ethers (PBDE).
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.
•
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
SCM
“P” Type
Module
Figure 1
Style SCM Discharge restrictive decoupling used
to protect dual IGBT modules
External
Resistor
Dual
IGBT
Module
Single
IGBT
Module
External
Resistor
SCM
“N” Type
Module
Single
IGBT
Module
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
L
Max.
H
Max.
C
E
5 mm
16 mm
UL 1015 AWG 18
L = 22 mm min
W
Max.
8 mm
15 mm
P
±1.0 mm
7 mm dia
Ratings
Typical Application
IGBT Module
Catalog
Part Number
SCM474K601H7N29-F
SCM474K601H7P29-F
SCM105K601H7N24-F
SCM105K601H7P24-F
SCM105K601H5N29-F
SCM105K601H5P29-F
SCM155K601H7N24-F
SCM155K601H7P24-F
SCM205K601H5N24-F
SCM205K601H5P24-F
SCM205K601H2N29-F
SCM205K601H2P29-F
SCM474K122H8N29-F
SCM474K122H8P29-F
SCM105K122H8N24-F
SCM105K122H8P24-F
SCM105K122H4N29-F
SCM105K122H4P29-F
SCM155K122H8N24-F
SCM155K122H8P24-F
SCM205K122H4N24-F
SCM205K122H4P24-F
SCM205K122H1N29-F
SCM205K122H1P29-F
Cap S=Single
(µF)
0.47
0.47
1.00
1.00
1.00
1.00
1.50
1.50
2.00
2.00
2.00
2.00
0.47
0.47
1.00
1.00
1.00
1.00
1.50
1.50
2.00
2.00
2.00
2.00
D=Dual
S
S
D
D
S
S
D
D
D
D
S
S
S
S
D
D
S
S
D
D
D
D
S
S
Ic
(A)
200–300
200–300
100–200
100–200
300–400
300–400
200–300
200–300
300–400
300–400
400–600
400–600
Vce
(V)
600
600
600
600
600
600
600
600
600
600
600
600
Type
N
P
N
P
N
P
N
P
N
P
N
P
N
P
N
P
N
P
N
P
N
P
N
P
Vrrm
(V)
600
600
600
600
600
600
600
600
600
600
600
600
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
If
(A)
30
30
30
30
50
50
30
30
50
50
Trr
(µs)
0.040
0.040
0.040
0.040
0.045
0.045
0.040
0.040
0.045
0.045
Diode Characteristics
Ipk
surge
(A)
300
300
300
300
500
500
300
300
500
500
1000
1000
300
300
300
300
500
500
300
300
500
500
1000
1000
Ipk
rep
(A)
70
70
70
70
(in)
W
(mm)
(in)
L
(mm)
(in)
Dimensions
H
(mm)
(in)
1.142
1.142
0.945
0.945
1.142
1.142
0.945
0.945
0.945
0.945
1.142
1.142
1.142
1.142
0.945
0.945
1.142
1.142
0.945
0.945
0.945
0.945
1.142
1.142
P
(mm)
29
29
24
24
29
29
24
24
24
24
29
29
29
29
24
24
29
29
24
24
24
24
29
29
1.725 43.82 2.200 55.88 1.34 34.04
1.725 43.82 2.200 55.88 1.34 34.04
1.500 38.10 1.875 47.63 1.25 31.75
1.500 38.10 1.875 47.63 1.25 31.75
100 1.825 46.36 2.225 56.52 1.50 38.10
100 1.825 46.36 2.225 56.52 1.50 38.10
70
70
1.350 34.29 2.200 55.88 1.20 30.48
1.500 38.10 1.875 47.63 1.25 31.75
100 1.725 43.82 2.200 55.88 1.34 34.04
100 1.725 43.82 2.200 55.88 1.34 34.04
200 1.825 46.36 2.225 56.52 1.50 38.10
200 1.825 46.36 2.225 56.52 1.50 38.10
60
60
60
60
1.350 34.29 2.200 55.88 1.20 30.48
1.500 38.10 1.875 47.63 1.25 31.75
1.750 44.45 2.500 63.50 1.47 37.34
1.750 44.45 2.500 63.50 1.47 37.34
100 0.050
100 0.050
30
30
30
30
50
50
30
30
50
50
0.065
0.065
0.065
0.065
0.085
0.085
0.065
0.065
0.065
0.065
200–300 1200
200–300 1200
100–200 1200
100–200 1200
300–400 1200
300–400 1200
200–300 1200
200–300 1200
300–400 1200
300–400 1200
400–600 1200
400–600 1200
100 1.725 43.82 2.200 55.88 1.34 34.04
100 1.825 46.36 2.225 56.52 1.50 38.10
60
60
1.750 44.45 2.500 63.50 1.47 37.34
1.825 46.36 2.225 56.52 1.50 38.10
100 2.125 53.98 2.500 63.50 1.70 43.18
100 2.125 53.98 2.500 63.50 1.70 43.18
200 2.125 53.98 2.500 63.50 1.70 43.18
200 2.125 53.98 2.500 63.50 1.70 43.18
1200 100 0.090
1200 100 0.090
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
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