STD/SDT165
Thyristor-Diode Modules, Diode-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT165
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
R
thJC
for various conduction angles d:
d
DC
180
o
C
120
o
C
60
o
C
30
o
C
R
thJC
(K/W)
0.155
0.167
0.175
0.197
0.226
Constants for Z
thJC
calculation:
i
1
2
3
R
thi
(K/W)
0.0072
0.0188
0.129
t
i
(s)
0.001
0.08
0.2
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R
thJK
for various conduction angles d:
d
DC
180
o
C
120
o
C
60
o
C
30
o
C
R
thJK
(K/W)
0.225
0.237
0.245
0.262
0.296
Constants for Z
thJK
calculation:
i
1
2
3
4
R
thi
(K/W)
0.0072
0.0188
0.129
0.07
t
i
(s)
0.001
0.08
0.2
1.0
SIRECTIFIER [ SIRECTIFIER SEMICONDUCTORS ]
