STD/SDT100
Thyristor-Diode Modules, Diode-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT100
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)
0.22
0.23
0.25
0.27
0.28
Constants for Z
thJC
calculation:
i
1
2
3
R
thi
(K/W)
0.0066
0.0678
0.1456
t
i
(s)
0.0019
0.0477
0.344
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)
0.42
0.43
0.45
0.47
0.48
Constants for Z
thJK
calculation:
i
1
2
3
4
R
thi
(K/W)
0.0066
0.0678
0.1456
0.2
t
i
(s)
0.0019
0.0477
0.344
1.32
SIRECT [ Sirectifier Global Corp. ]
