Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
POW-R-BLOK
TM
Dual Diode Isolated Module
260 Amperes / Up to 2000 Volts
Revision Date: 11/1/2001
ND41__26
ND41 Outline Dimensions
Dimension Inches
Millimeters
A 4.57 116
B 3.66
93
C 3.15 80.0
E 2.06 52.3
F 2.05 52.0
G 1.97 50.0
H 1.90 48.3
J 1.50 38.1
K 1.38 35.0
L 1.35 34.3
M 1.122 28.5
N .71 18.0
P .57 14.5
Q .625 15.9
R .394 10.00
S .350 8.9
T M8
Metric M8
U
.22 Dia.
5.6 Dia.
W .12
3.0
Note: Dimensions are for reference only.
ND41__26
Dual Diode Isolated
POW-R-BLOK
TM
Module
260 Amperes / 600-2000 Volts
Ordering Information
:
Select the complete eight digit
module part number from the table
below.
Example: ND412026 is a 2000Volt,
260 Ampere Dual Diode Isolated
POW-R-BLOK
TM
Module
Type
Voltage
Volts
(x100)
Current
Amperes
(x10)
ND41 06
08
10
12
14
16
18
20
26
Description:
Powerex Dual Diode Modules are
designed for use in applications
requiring rectification and isolated
packaging. The modules are isolated
for easy mounting with other
components on a common heatsink.
POW-R-BLOK
TM
has been tested and
recognized by the Underwriters
Laboratories.
Features:
T Electrically Isolated Heatsinking
T Aluminum Nitride Isolator
T Compression Bonded Elements
T Metal Baseplate
T Low Thermal Impedance
for Improved Current Capability
T UL Recognized
Benefits:
T No Additional Insulation
Components Required
T Easy Installation
T No Clamping Components
Required
T Reduce Engineering Time
Applications:
T Bridge Circuits
T AC & DC Motor Drives
T Battery Supplies
T Power Supplies
T Large IGBT Circuit Front Ends
CONNECTION DIAGRAM
A
K
AK
DIODE 1
DIODE 2
M
K
G
A
B
N
R
T - M8 THD. (3 TYP.)
U - DIA. (4 TYP.)
OUTLINE DRAWING
A
K
AK
J
C
S
P
Q
F
H
W
L
E
W
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
POW-R-BLOK
TM
Dual Diode Isolated Module
260 Amperes / Up to 2000 Volts
Revision Date: 11/1/2001
ND41__26
Absolute Maximum Ratings
Characteristics Conditions
Symbol
Units
Repetitive Peak Reverse Blocking Voltage
V
RRM
up to 2000
V
Non-Repetitive Peak Reverse Blocking Voltage
(t < 5 msec)
V
RSM
V
RRM
+ 200
V
RMS Forward Current
180 Conduction, T
C
=112C I
F(RMS)
408 A
Average Forward Current
180 Conduction, T
C
=112C I
F(AV)
260 A
Peak One Cycle Surge Current, Non-Repetitive
60 Hz, 100% V
RRM
reapplied
I
FSM
8000 A
Peak Three Cycle Surge Current, Non-Repetitive
60 Hz, 100% V
RRM
reapplied
I
FSM
5750 A
Peak Ten Cycle Surge Current, Non-Repetitive
60 Hz, 100% V
RRM
reapplied
I
FSM
4975
A
I
2
t for Fusing for One Cycle, 8.3 milliseconds
I
2
t 266,000
A
2
sec
Operating Temperature
T
J
-40
to
+150 C
Storage Temperature
T
stg
-40
to
+150 C
Max. Mounting Torque, M6 Mounting Screw
45
5
in.-Lb.
Nm
Max. Mounting Torque, M8 Terminal Screw
110
12
in.-Lb.
Nm
Module Weight, Typical
840
g
1.85
lb.
V Isolation @ 25C
V
rms
2500 V
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
POW-R-BLOK
TM
Dual Diode Isolated Module
260 Amperes / Up to 2000 Volts
Revision Date: 11/1/2001
ND41__26
Electrical Characteristics, T
J
=25C unless otherwise specified
Characteristics
Symbol
Test Conditions
Min.
Max. Units
Repetitive Peak Reverse Leakage Current
I
RRM
Up to 2000V, T
J
=150C
50
mA
Peak On-State Voltage
V
FM
I
FM
=1500A
1.35
V
Threshold Voltage, Low-level
Slope Resistance, Low-level
V
(TO)1
r
T1
T
J
= 150C, I = 15%I
F(AV)
to I
F(AV)
0.764
0.360
V
m
Threshold Voltage, High-level
Slope Resistance, High-level
V
(TO)2
r
T2
T
J
= 150C, I = I
F(AV)
to I
FSM
.710
0.420
V
m
V
TM
Coefficients, Full Range
T
J
= 150C, I = 15%I
F(AV)
to I
FSM
V
FM
= A+ B Ln I +C I + D Sqrt I
A =
B =
C =
D =
0.7140
0.0232
4.72 E-4
-6.71 E-3
Diode Reverse Recovery Time (Typical)
t
rr
I
fm
= 1500A, T
p
= 190 s
di/dt = -25A/s
10
s
Thermal Characteristics
Characteristics Symbol
Max.
Units
Thermal Resistance, Junction to Case
R
J-C
Per Module, both conducting
Per Junction both conducting
0.07
0.14
C/W
C/W
Thermal Impedance Coefficients
Z
J-C
Z
J-C
= K
1
(1-exp(-t/
1
))
+ K
2
(1-exp(-t/
2
))
+ K
3
(1-exp(-t/
3
))
+ K
4
(1-exp(-t/
4
))
K
1
= 5.27E-3
K
2
= 1.17E-2
K
3
= 5.26E-2
K
4
= 6.97E-2
1
= 1.69E-4
2
= 2.07E-2
3
= 2.37E-1
4
= 2.46
Thermal Resistance, Case to Sink Lubricated
R
C-S
Per Module
0.03
C/W
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
POW-R-BLOK
TM
Dual Diode Isolated Module
260 Amperes / Up to 2000 Volts
Revision Date: 11/1/2001
ND41__26
Maximum Transient Thermal Impedance
.00
.02
.04
.06
.08
.10
.12
.14
.16
0.001
0.01
0.1
1
10
100
Time - t - Seconds
Therm
al Im
pedance - Rjc -
C
/W
(Junction to Case)
Ma ximum On-State Forw ard Voltage Drop
0
1
2
3
4
5
10
100
1000
10000
Instantaneous On-State Current - Ifm - Amperes
O
n
-S
tate V
o
l
t
age - V
f
m - V
o
l
t
s
( Tj = 150 C )
0
180
360
CONDUCTION ANGLE
Maximum On-State Power Dissipation
15
30
60
90
120
180
0
50
100
150
200
250
300
0
50
100
150
200
250
300
Average On-State Current - If(av) - Amperes
M
ax.
Pow
e
r
Di
ssi
pat
i
on Per
Di
ode -
W
a
t
t
s
_
(Sinusoidal Waveform)
0
180
360
CONDUCTION ANGLE
Maximum Allowable Case Temperature
120
90
60
30
15
180
110
115
120
125
130
135
140
145
150
0
50
100
150
200
250
300
Average On-State Current - If(av) - Amperes
Max.
C
ase T
e
m
p
er
atu
r
e - T
case -C
_
(Sinusoidal Waveform)
0
180
360
CONDUCTION ANGLE
Maximum On-State Power Dissipation
90
60
30
120
180
270
15
360
0
50
100
150
200
250
300
350
400
0
50
100
150
200
250
300
350
400
450
Average On-State Current - If(av) - Amperes
M
a
x.
Power
Di
ssi
p
at
i
on Per
Di
ode -
W
a
t
t
s
_
(Rectangular Waveform)
0
180
360
CONDUCTION ANGLE
Maximum Allowable Case Temperature
270
180
120
90
60
30
15
360C
90
100
110
120
130
140
150
0
50
100
150
200
250
300
350
400
450
Average On-State Current - If(av) - Amperes
Max. Case T
e
m
p
erat
u
r
e -
T
case -
C_
(Rectangular Waveform)
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