Dimension
Inches
Millimeters
A
3.681 Max.
93.5 Max.
B
3.150
80
C
1.181 Max.
30 Max.
D
1.024 Max.
26 Max.
E
0.827
21
F
0.787
20
G
0.689
17.5
H
0.492
12.5
J
0.354
9
K
0.256
6.5
L
0.256 Dia.
Dia. 6.5
M
M5 Metric
M5
Description:
Powerex Dual SCR
POW-R-BLOKTM Modules are
designed for use in applications
requiring phase control and
isolated packaging. The modules
are isolated for easy mounting
with other components on
common heatsinks.
Features:
Isolated Mounting
Glass Passivated Chips
Metal Baseplate
Low Thermal Impedance
Applications:
Battery Supplies
Bridge Circuits
AC and DC Motor Control
Tap Changers
Lighting Control
Ordering Information:
Select the complete eight digit
module part number you desire
from the table below.
Example: CM4308A2 is an
800 Volt, 25 Ampere Dual SCR
POW-R-BLOKTM Module.
Voltage
Current Rating
Type
Volts (x100)
Amperes (25)
CM43
08
A2
S-9
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
Dual SCR
POW-R-BLOKTM Modules
25 Amperes/800 Volts
CM4308A2
Outline Drawing
CM4308A2
Dual SCR POW-R-BLOKTM Modules
25 Amperes/800 Volts
J
E
C
K
G
F
F
D
H
A
B
M - M5 THD
(3 TYP.)
A1K2 A2
G1
G2
K1
K1
K1 G1
K2 G2
A2
K1
A1K2
L - DIA.
(2 TYP.)
.110 TAB
K2
S-10
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
CM4308A2
Dual SCR POW-R-BLOKTM Modules
25 Amperes/800 Volts
Absolute Maximum Ratings
Characteristics
Symbol
CM4308A2
Units
Peak Forward Blocking Voltage
VDRM
800
Volts
Transient Peak Forward Blocking Voltage (Non-Repetitive), t < 5ms
VDSM
960
Volts
DC Forward Blocking Voltage
VD(DC)
640
Volts
Peak Reverse Blocking Voltage
VRRM
800
Volts
Transient Peak Reverse Blocking Voltage (Non-Repetitive), t < 5ms
VRSM
960
Volts
DC Reverse Blocking Voltage
VR(DC)
640
Volts
RMS On-State Current
IT(RMS)
39
Amperes
Average On-State Current, TC = 93C
IT(AV)
25
Amperes
Peak One-Cycle Surge (Non-Repetitive) On-State Current (60Hz)
ITSM
490
Amperes
Peak One-Cycle Surge (Non-Repetitive) On-State Current (50Hz)
ITSM
445
Amperes
I2t (for Fusing), 8.3 milliseconds
I2t
1000
A2sec
Critical Rate-of-Rise of On-State Current*
di/dt
100
Amperes/ s
Peak Gate Power Dissipation
PGM
5.0
Watts
Average Gate Power Dissipation
PG(AV)
0.5
Watts
Peak Forward Gate Voltage
VGFM
10
Volts
Peak Reverse Gate Voltage
VGRM
5.0
Volts
Peak Forward Gate Current
IGFM
2.0
Amperes
Storage Temperature
TSTG
-40 to 125
C
Operating Temperature
Tj
-40 to 125
C
Maximum Mounting Torque M6 Mounting Screw
--
26
in.-lb.
Maximum Mounting Torque M5 Terminal Screw
--
17
in.-lb.
Module Weight (Typical)
--
160
Grams
V Isolation
VRMS
2000
Volts
*Tj = 125C, IG = 0.5A, VD = 1/2 VDRM
Electrical and Thermal Characteristics,
Tj = 25C unless otherwise specified
Characteristics
Symbol
Test Conditions
CM4308A2
Units
Blocking State Maximums
Forward Leakage Current, Peak
IDRM
Tj = 125C, VDRM = Rated
4.0
mA
Reverse Leakage Current, Peak
IRRM
Tj = 125C, VRRM = Rated
4.0
mA
Conducting State Maximums
Peak On-State Voltage
VTM
ITM = 75A
1.5
Volts
Switching Minimums
Critical Rate-of-Rise of Off-State Voltage
dv/dt
Tj = 125C, VD = 2/3 VDRM
500
Volts/ s
Thermal Maximums
Thermal Resistance, Junction-to-Case
R (J-C)
Per Module
0.8
C/Watt
Thermal Resistance, Case-to-Sink (Lubricated)
R (C-S)
Per Module
0.2
C/Watt
Gate Parameters Maximums
Gate Current-to-Trigger
IGT
VD = 6V, RL = 2
50
mA
Gate Voltage-to-Trigger
VGT
VD = 6V, RL = 2
3.0
Volts
Non-Triggering Gate Voltage
VGDM
Tj = 125C, VD = 1/2 VDRM
0.25
Volts
S-11
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
CM4308A2
Dual SCR POW-R-BLOKTM Modules
25 Amperes/800 Volts
INSTANTANEOUS ON-STATE CURRENT, I
TM
,
(AMPERES)
MAXIMUM
ON-STATE CHARACTERISTICS
0.6
10
0
1.0
1.4
1.8
2.2
2.6
10
1
10
2
10
3
T
j
= 125
o
C
INSTANTANEOUS ON-STATE VOLTAGE, V
TM
, (VOLTS)
CYCLES AT 60 H
Z
MAXIMUM PEAK SURGE (NON-REPETITIVE)
CURRENT, I
TSM
, (AMPERES)
MAXIMUM ALLOWABLE PEAK SURGE
(NON-REPETITIVE) CURRENT
0
10
1
10
2
10
0
50
100
150
200
250
300
350
400
450
500
MAXIMUM ALLOWABLE CASE TEMPERATURE
(SINUSOIDAL WAVEFORM)
AVERAGE ON-STATE CURRENT, I
T(AV)
,
(AMPERES)
MAXIMUM ALLOWABLE CASE TEMPERATURE, T
C
, (
o
C)
0
5
25
10
15
20
80
90
100
110
120
130
= 30
o
60
o
90
o
360
o
RESISTIVE,
INDUCTIVE
LOAD PER
SINGLE
ELEMENT
180
o
120
o
MAXIMUM ON-STATE POWER DISSIPATION
(SINUSOIDAL WAVEFORM)
AVERAGE ON-STATE CURRENT, I
T(AV)
,
(AMPERES)
MAXIMUM POWER DISSIPATION, P
AV(MAX)
, (WATTS)
0
5
25
10
15
20
0
40
360
o
RESISTIVE,
INDUCTIVE
LOAD PER
SINGLE
ELEMENT
5
10
15
20
25
30
35
= 30
o
120
o
180
o
60
o
90
o
50
MAXIMUM ALLOWABLE CASE TEMPERATURE
(RECTANGULAR WAVEFORM)
AVERAGE ON-STATE CURRENT, I
T(AV)
,
(AMPERES)
MAXIMUM ALLOWABLE CASE TEMPERATURE, T
C
, (
o
C)
0
5
25
10
15
20
30
35
40
60
70
80
90
100
110
120
130
360
o
RESISTIVE, INDUCTIVE
LOAD PER SINGLE
ELEMENT
= 30
o
60
o
90
o
120
o
180
o
270
o
DC
0
MAXIMUM AVERAGE ON-STATE POWER
DISSIPATION (RECTANGULAR WAVEFORM)
AVERAGE ON-STATE CURRENT, I
T(AV)
,
(AMPERES)
MAXIMUM POWER DISSIPATION, P
AV(MAX)
, (WATTS)
0
5
25
10
15
20
30
35
40
360
o
RESISTIVE, INDUCTIVE LOAD
PER SINGLE ELEMENT
10
20
30
40
50
120
o
180
o
270
o
= 30
o
60
o
90
o
DC
TIME, t, (SECONDS)
TRANSIENT THERMAL IMPEDANCE
CHARACTERISTICS (JUNCTION-TO-CASE)
0
10
-3
0.2
0.4
0.6
0.8
1.0
10
-2
10
-1
10
0
TRANSIENT THERMAL IMPEDANCE, Z
(J-C)
(t), (
o
C/WATT)
10
0
10
1
0.9
0.7
0.5
0.3
0.1
INSTANTANEOUS GATE CURRENT, I
G
, (mA)
TRIGGERING
CHARACTERISTICS
10
1
10
2
10
3
10
4
INSTANTANEOUS GATE VOLTAGE, V
G
, (VOLTS)
10
-1
10
0
10
1
10
2
V
GFM
= 10V
V
GT
= 3.0V
P
GM
= 5.0W
P
G(AV)
=
0.50W
I
GFM
=
2.0A
I
GT
= 50mA
T
j
= 25
o
C
V
GDM
= 0.25V
90
MAXIMUM ALLOWABLE CASE TEMPERATURE
(REVERSE PARALLEL CONNECTION)
MAXIMUM ALLOWABLE CASE TEMPERATURE, T
C
, (
o
C)
0
10
50
20
30
40
60
70
80
95
100
105
110
115
120
125
130
85
80
360
o
RESISTIVE,
INDUCTIVE LOAD
RMS ON-STATE CURRENT, I
(RMS)
, (AMPERES)
NOTE: THE CURVES INDICATE THE
RELATIONSHIP BETWEEN THE CASE
TEMPERATURE AND THE RMS
ON-STATE CURRENT FOR EACH
MODULE.
= 30
o
,
60
o
,
90
o
120
o
,
180
o
S-12
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
CM4308A2
Dual SCR POW-R-BLOKTM Modules
25 Amperes/800 Volts
MAXIMUM ON-STATE POWER DISSIPATION
(REVERSE PARALLEL CONNECTION)
RMS ON-STATE CURRENT, I
(RMS)
, (AMPERES)
MAXIMUM POWER DISSIPATION, P
AV(MAX)
, (WATTS)
0
10
50
20
30
40
60
70
80
0
360
o
RESISTIVE,
INDUCTIVE LOAD
NOTE: THE CURVES INDICATE THE RELATIONSHIP BETWEEN
THE AVERAGE ON-STATE POWER DISSIPATION PER MODULE
AND THE RMS ON-STATE CURRENT.
10
20
30
40
50
60
70
80
90
o
60
o
30
o
120
o
= 180
o
MAXIMUM ALLOWABLE CASE TEMPERATURE
(SINGLE PHASE BRIDGE CONNECTION)
DC OUTPUT CURRENT, I
C
, (AMPERES)
MAXIMUM ALLOWABLE CASE TEMPERATURE, T
C
, (
o
C)
0
10
50
20
30
40
80
90
100
110
120
130
= 30
o
60
o
90
o
360
o
RESISTIVE,
INDUCTIVE
LOAD
5
15
25
35
45
125
115
105
95
85
180
o
NOTE: THE CURVES INDICATE THE RELATIONSHIP BETWEEN
THE CASE TEMPERATURE AND THE DC OUTPUT CURRENT
(FOR TWO ELEMENTS) WHEN USED IN THE SINGLE PHASE
BRIDGE CONFIGURATION.
120
o
MAXIMUM ON-STATE POWER DISSIPATION
(SINGLE PHASE BRIDGE CONNECTION)
DC OUTPUT CURRENT, I
O
, (AMPERES)
MAXIMUM POWER DISSIPATION, P
AV(MAX)
, (WATTS)
0
5
0
360
o
RESISTIVE,
INDUCTIVE LOAD
NOTE: THE CURVES INDICATE THE RELATIONSHIP BETWEEN
THE AVERAGE ON-STATE POWER DISSIPATION AND THE DC
OUTPUT CURRENT FOR THE SINGLE PHASE BRIDGE
CONFIGURATION (POWER DISSIPATION EXPRESSED FOR EACH
MODULE AND DC OUTPUT CURRENT EXPRESSED FOR THE PAIR)
10
20
30
40
50
60
70
80
10 15 20 25 30 35 40 45 50
= 30
o
120
o
90
o
60
o
180
o
MAXIMUM ON-STATE POWER DISSIPATION
(THREE PHASE BRIDGE CONNECTION)
DC OUTPUT CURRENT, I
O
, (AMPERES)
MAXIMUM POWER DISSIPATION, P
AV(MAX)
, (WATTS)
0
10
50
20
30
40
60
70
80
0
NOTE: THE CURVES INDICATE THE RELATIONSHIP BETWEEN
THE ON-STATE POWER DISSIPATION (PER MODULE) AND THE
DC OUTPUT CURRENT (FOR THREE MODULES) IN THE THREE
PHASE BRIDGE CONFIGURATION.
10
20
30
40
50
60
70
80
360
o
RESISTIVE, INDUCTIVE LOAD
PER SINGLE ELEMENT
= 30
o
120
o
90
o
60
o
80
MAXIMUM ALLOWABLE CASE TEMPERATURE
(THREE PHASE BRIDGE CONNECTION)
DC OUTPUT CURRENT, I
O
, (AMPERES)
MAXIMUM ALLOWABLE CASE TEMPERATURE, T
C
, (
o
C)
0
10
50
20
30
40
60
70
80
85
95
110
115
120
125
130
360
o
NOTE: THE CURVES INDICATE THE RELATIONSHIP BETWEEN
THE CASE TEMPERATURE AND THE DC OUTPUT CURRENT
(FOR THREE MODULES) IN THE THREE PHASE CONFIGURATION.
RESISTIVE,
INDUCTIVE
LOAD
= 30
o
60
o
90
o
120
o
105
100
90
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