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STT60
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R
thJC for various conduction angles d:
d
R
thJC (K/W)
DC
0.45
180oC
0.47
120oC
0.49
60oC
0.505
30oC
0.52
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.014
0.015
2
0.026
0.0095
3
0.41
0.175
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
0.65
180oC
0.67
120oC
0.69
60oC
0.705
30oC
0.72
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.014
0.015
2
0.026
0.0095
3
0.41
0.175
4
0.2
0.67
3 x STT60
STT60
STT60
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