Dimension
Inches
Millimeters
A
3.94
100.0
B
3.380.01
86.00.25
C
2.16
55.0
D
1.610.01
41.00.25
E
1.18
30.0
F
1.12
28.5
G
0.76
19.4
H
0.71
18.0
J
M8 Metric
M8
K
0.28 R
R7.0
L
0.28
7.0
M
0.22 Dia.
Dia. 5.5
Description:
Powerex Fast Recovery Welder
Diode Modules are designed for
use in applications requiring fast
switching. The modules are
isolated for easy mounting with
other components on common
heatsinks.
Features:
Isolated Mounting
Planar Chips
Applications:
Welding Power Supplies
Free Wheeling Diodes
Center Tap Circuits
Ordering Information:
Select the complete ten digit
module part number you desire
from the table below.
Example: RM300CA-9W is a
450V (VCES), 300 Ampere, Fast
Recovery Common Cathode
Diode Module.
Current Rating
Voltage
Type
Amperes
Volts (x50)
RM
300
9W
D-45
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
Fast Recovery
Welder Diode Module
300 Amperes/450 Volts
RM300CA-9W
Outline Drawing
RM300CA-9W
Fast Recovery Welder Diode Module
300 Amperes/450 Volts
L
E
F
H
D C
A
B
E
E
G
K (4 TYP.)
J - M8 THD
(3 TYP.)
M - DIA.
(4 TYP.)
A2
K
A1
K
A2
A1
D-46
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
RM300CA-9W
Fast Recovery Welder Diode Module
300 Amperes/450 Volts
Absolute Maximum Ratings
Characteristics
Symbol
RM300CA-9W
Units
Peak Reverse Blocking Voltage
VRRM
450
Volts
Transient Peak Reverse Blocking Voltage (Non-Repetitive), t < 5ms
VRSM
540
Volts
DC Reverse Blocking Voltage
VR(DC)
360
Volts
DC Current, TC = 114C
IF(DC)
300
Amperes
Peak Half-Cycle Surge (Non-Repetitive) On-State Current (60Hz)
IFSM
6000
Amperes
I2t (for Fusing), 8.3 milliseconds
I2t
37500
A2sec
Junction Temperature
Tj
-40 to 150
C
Storage Temperature
TSTG
-40 to 125
C
Maximum Mounting Torque M8 Mounting Screw
--
110
kg.-cm.
Maximum Mounting Torque M5 Terminal Screw
--
20
kg.-cm.
Module Weight (Typical)
--
460
Grams
V Isolation
VRMS
2500
Volts
Electrical and Thermal Characteristics,
Tj = 25C unless otherwise specified
Characteristics
Symbol
Test Conditions
RM300CA-9W
Units
Blocking State Maximums
Reverse Leakage Current, Peak
IRRM
Tj = 150C, VRRM = Rated
40
mA
Conducting State Maximums
Peak On-State Voltage
VFM
IFM = 300A
1.2
Volts
Switching Minimums
Reverse Recovery Time
trr
IFM = 300A, Tj = 25C
0.5
s
-di/dt = 600 A/ s, VR = 300V
Reverse Recovery Charge
Qrr
IFM = 300A, Tj = 25C
50
C
-di/dt = 600 A/ s, VR = 300V
Thermal Maximums
Thermal Resistance, Junction-to-Case
R (J-C)
Per Module
0.068
C/Watt
Thermal Resistance, Case-to-Sink (Lubricated)
R (C-S)
Per Module
0.08
C/Watt
di/dt, (AMPERES/s)
REVERSE RECOVERY VS di/dt
CHARACTERISTICS (TYPICAL)
10
1
10
2
10
4
REVERSE RECOVERY, I
rr
, (AMPERES), Q
rr
, (C)
10
0
10
2
10
3
REVERSE RECOVERY TIMES, t
rr,
(s)
10
-1
10
1
10
2
t
rr
V
R
= 300V
di/dt = 600A/s
10
1
10
3
10
0
I
rr
T
j
= 25
o
C
T
j
= 150
o
C
Q
rr
FORWARD VOLTAGE DROP, V
F
, (VOLTS)
FORWARD CURRENT, I
F
, (AMPERES)
FORWARD VOLTAGE DROP
CHARACTERISTICS (TYPICAL)
0.8
1.4
0.4
10
2
10
3
10
1
0.6
1.0
1.2
T
j
= 25
o
C
T
j
= 150
o
C
REVERSE RECOVERY VS FORWARD CURRENT
CHARACTERISTICS (TYPICAL)
10
1
10
2
10
4
REVERSE RECOVERY, I
rr
, (AMPERES), Q
rr
, (C)
10
0
10
2
10
3
10
-1
10
1
10
2
Q
rr
t
rr
V
R
= 300V
-di/dt = 600A/s
10
1
10
3
10
0
I
rr
FORWARD CURRENT, I
F
(AMPERES)
T
j
= 25
o
C
T
j
= 150
o
C
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