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LD43__50
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
Dual SCR Isolated Module
R
OUTLINE DRAWING
A
B
C
J F
POW-R-BLOK
500 Amperes / Up to 1600 Volts
Description:
Powerex Dual SCR Modules are
designed for use in applications
requiring phase control and isolated
TM
packaging. The modules are isolated
for easy mounting with other
3
Q - DIA. (4 TYP.)
E
45
7
6
CONNECTION DIAGRAM
2
L H
4
56
7
3
P - M10 THD (3 TYP.)
T - (4 TYP.)
Ordering Information
1
K DG
M
S
N
12
:
Select the complete eight-digit
module part number from the table
below.
Example: LD431650 is a 1600V,
500 Ampere Dual SCR Isolated
POW-R-BLOK
TM
Module.
Type
Voltage
Volts
(x100)
LD43 08
10
12
14
16
Current
Amperes
(x10)
50
LD43__50
Dual SCR
POW-R-BLOK
TM
Module
500 Amperes / 800-1600 Volts
LD43 Outline Dimensions
Dimension Inches Millimeters
A 5.91 150.0
B 4.88 124.0
C 4.41 112.0
D 2.36 60.0
E 2.05 52.0
F 1.97 50.0
G 1.89 48.0
H 1.73 44.0
J 1.22 31.0
K 1.10 28.0
L 1.00 25.4
M 0.69 17.5
N 0.39 10.0
P M10 Metric M10
Q 0.26 Dia. 6.5 Dia.
R 0.24 6.0
S 0.12 3.0
T .110 x .032 2.5 x 0.8
Note: Dimensions are for reference only.
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
Revision Date: 12/04/2002

LD43__50
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
Dual SCR Isolated Module
POW-R-BLOK
500 Amperes / Up to 1600 Volts
TM
Absolute Maximum Ratings
Characteristics Conditions Symbol Units
Repetitive Peak Forward and Reverse Blocking
Voltage
Non-Repetitive Peak Blocking Voltage
(t < 5 msec)
RMS Forward Current I
Average Forward Current 180° Conduction, TC=86°C I
Peak One Cycle Surge Current, Non-Repetitive 60 Hz, 100% V
50 Hz, 100% V
Peak Three Cycle Surge Current, Non-Repetitive 60 Hz, 100%V
Peak Ten Cycle Surge Current, Non-Repetitive 60 Hz, 100% V
I2t for Fusing for One Cycle 8.3 milliseconds
Maximum Rate-of-Rise of On-State Current,
Per JEDEC Standard 397 5.2.2.6 di/dt 200 A/µs
(Repetitive)
Operating Temperature TJ -40 to +130 °C
Storage Temperature T
Max. Mounting Torque, M6 Mounting Screw 55
Max. Mounting Torque, M10 Terminal Screw 110
Module Weight, Typical 1500 g
3.30 lb
V Isolation @ 25C
V
V
reapplied
RRM
reapplied
RRM
reapplied I
RRM
reapplied I
RRM
10 milliseconds
& V
DRM
RRM
V
RSM
900 A
T(RMS)
500 A
T(AV)
I
TSM
I
TSM
12,250 A
TSM
10,500 A
TSM
I2t
2
I
t
-40 to +150 °C
stg
V
rms
up to 1600 V
+ 100 V
RRM
17,000
16,300
1.20 x 10
1.33 x 10
6
6
2
A
2
A
in. – Lb.
6
Nm
in. – Lb.
12
Nm
3000 V
A
A
sec
sec
Revision Date: 12/04/2002

LD43__50
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
Dual SCR Isolated Module
POW-R-BLOK
500 Amperes / Up to 1600 Volts
TM
Electrical Characteristics, TJ=25°C unless otherwise specified
Characteristics Symbol Test Conditions Min. Max.
Repetitive Peak Forward Leakage Current I
Repetitive Peak Reverse Leakage Current I
Peak On-State Voltage VFM I
Threshold Voltage, Low-level
Slope Resistance, Low-level
Threshold Voltage, High-level
Slope Resistance, High-level
VTM Coefficients, Full Range
Minimum dV/dt dV/dt Exponential to V
Gate Trigger Current IGT T
Gate Trigger Voltage VGT T
Non-Triggering Gate Voltage V
Peak Forward Gate Current I
Peak Reverse Gate Voltage V
Up to 1600V, TJ=130°C 80 mA
DRM
Up to 1600V, TJ=130°C 80 mA
RRM
=1500A 1.30 V
TM
V
(TO)1
r
T1
V
(TO)2
r
T2
T
GDM
4.0 Amp
GTM
5 Volts
GRM
T
= 130°C, I = 15%I
J
= 130°C, I = πI
T
J
T(AV)
T(AV)
TJ = 130°C, I = 10A to 6kA
V
= A+ B Ln I +C I + D Sqrt I
TM
T
=130°C, Gate Open
j
=25°C, VD=12V 200 mA
j
=25°C, VD=12V 3.0 Volts
j
=130°C, VD= ½ V
j
to πI
to I
DRM
DRM
0.81
T(AV)
0.90
TSM
A =
B =
C =
D =
1000 Typ. V/µs
0.8824
-4.46E-02
8.12E-05
1.54E-02
0.25 Volts
Units
0.32 V mΩ
0.26 V mΩ
Thermal Characteristics
Characteristics Symbol
Thermal Resistance, Junction to Case
Thermal Impedance Coefficients
R
Z
ΘJ-C
Θ
J-C
Per Module, both conducting
Per Junction, both conducting
Z
Θ
J-C
+ K
+ K
+ K
Thermal Resistance, Case to Sink Lubricated
R
ΘC-S
= K1 (1-exp(-t/
(1-exp(-t/
2
(1-exp(-t/
3
(1-exp(-t/
4
))
τ
1
))
τ
2
))
τ
3
))
τ
4
Per Module 0.01 °C/W
= 8.03E-04
K
1
K2 = 1.03E-02
K3 = 1.64E-02
K4 = 3.75E-02
Max. Units
τ
τ2
0.0325
0.0650
= 3.39E-04
1
= 3.15E-03
= 0.106
τ3
= 2.066
4
τ
°C/W
°C/W
Revision Date: 12/04/2002

LD43__50
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
Dual SCR Isolated Module
POW-R-BLOK
500 Amperes / Up to 1600 Volts
TM
Maximum On-State Forward Voltage Drop
( Tj = 130 °C )
5.00
LD43N
4.00
3.00
2.00
On-State Voltage - Vtm - Volts
1.00
0.00
10 100 1000 10000 100000
Instantan e ous On-S ta te Current - Itm - Amperes
Ma ximum O n -State Pow er D iss ipatio n
700
600
500
400
300
200
Max. Power Dissipation Per SCR - Watts
100
LD43N
0
0 100 200 300 400 500 600
(Sinusoidal Waveform)
120°
90°
60°
30°
15°
180
0
CONDUCTION ANGLE
Average O n-S tate Current - It(av ) - Amp er es
360
180°
Maximum Transient Thermal Impedance
(Junction to Case)
.07000
LD43N
.06000
.05000
.04000
.03000
.02000
Thermal Impedance - Zjc - °C/W
.01000
.00000
0.0001 0.001 0.01 0.1 1 10 100
Time - t - Seconds
Maximum Allowable Case Temperature
(Sinusoidal Waveform)
130
125
120
115
110
105
100
95
90
Max. Case Temperature - Tcase -°C_
85
LD43N
80
0 100 200 300 400 500 600
15°
30°
60°
Average On-State Current - It(av) - Amperes
180 360
0
CONDUCTION ANGLE
90°
120°
180°
Maximum On-State Power Dissipation
(Rectangular Waveform)
900
LD43N
800
700
600
500
400
300
200
Max. Power Dissipation Per SCR - Watts
100
0
0 100 200 300 400 500 600 700 800 900
30°
15°
90°
60°
120°
180°
180
0
CONDUCTION ANGLE
270°
360°
360
Average On-State Current - It(av) - Amperes
Maximum Allowable Case Temperature
140
130
120
110
100
90
80
Max. Case Temperature - Tcase -°C
70
LD43N
60
0 100 200 300 400 500 600 700 800 900
(Rectangular Waveform)
15°
30°
60°
90°
120°
180
0
CONDUCTION ANGLE
180°
270°
360
Average On - Stat e Current - It(av) - Amperes
Revision Date: 12/04/2002
360°C

LD43__50
Powerex, Inc., Hillis Street, Youngwood, Pennsylvania 15697 (724) 925-7272
Dual SCR Isolated Module
POW-R-BLOK
500 Amperes / Up to 1600 Volts
TM
Powerex
4000
3500
0.02
3000
0.025
2500
0.03
0.04
2000
0.05
1500
0.06
0.08
Total Power Dissipation (W)
0.10
1000
0.12
0.15
0.20
500
0.30
0
10 30 50 70 90 110 130
0.01
0.015
LD43--50
Ambient Temperature (C)
Pow-R-Blok
Rth S-A (C/W)
6-Pulse Bridge
Total Power Dissipation vs Maximum Rated Output Current
4000
3500
3000
2500
2000
1500
1000
500
0
0 200 400 600 800 1000 1200 1400
Maximum Bridge Output Current (A)
Six-Pulse Bridge Circuit Total Power Dissipation & Maximum Rated Output Current With Sink to Ambient
Resistance of Heatsink as a Parameter.
4000
3500
3000
2500
2000
1500
Total Power Dissipation (W)
1000
500
0
Revision Date: 12/04/2002