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