PRELIMINARY
NDR3__34
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
www.pwrx.com
POW-R-BLOKTM
Dual SCR Isolated Module
340 Amperes / Up to 1800 Volts
Description:
Powerex Dual SCR Modules are
designed for use in applications
requiring phase control and isolated
packaging. The modules are isolated
for easy mounting with other
components on a common heatsink.
Features:
◼ Electrically Isolated Heatsinking
◼ Aluminum Nitride Insulator
◼ Compression Bonded Elements
◼ Metal Baseplate
◼ Low Thermal Impedance
for Improved Current Capability
◼ Quick Connect Gate Terminal
with Provision for Keyed Mating
Plug
NDR3__34
Dual SCR Isolated
POW-R-BLOKTM Module
340 Amperes / 1600-1800 Volts
Benefits:
◼ No Additional Insulation
Components Required
◼ Easy Installation
◼ No Clamping Components
Required
NDR3 Outline Dimensions
Ordering Information:
Select the complete eight digit
module part number from the table
below.
Dimension
Inches
Millimeters
A
B
C
D
E
F
4.53
3.62
115
92
Example: NDR31634 is a 1600Volt,
340 Ampere Dual SCR Isolated
POW-R-BLOKTM Module
◼ Reduce Engineering Time
3.15
80
1.77
45
1.73
44
Applications:
2.05
52
◼ Bridge Circuits
◼ AC & DC Motor Drives
◼ Battery Supplies
◼ Power Supplies
◼ Large IGBT Circuit Front Ends
G
H
J
1.97
50
Current
Amperes
(x 10)
Voltage
Volts
(x100)
Type
NDR3
1.95
49.5
38
1.50
K
L
1.38
35
16
18
34
1.26
32
M
N
P
Q
R
S
T
1.12
28.5
19
0.75
.47
12
.71
18
.32
8
.35
9
M8 Metric
.24 Dia.
.110 x .032
.12
M8
6
U
V
W
X
2.8 x 0.8
2.5
26
1.02
Note: Dimensions are for reference only.
Revision Date: 06/01/2018