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STT49
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
0.53
180oC
0.55
120oC
0.58
60oC
0.6
30oC
0.62
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.015
0.0035
2
0.026
0.02
3
0.489
0.195
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
0.73
180oC
0.75
120oC
0.78
60oC
0.8
30oC
0.82
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.015
0.0035
2
0.026
0.02
3
0.489
0.195
4
0.2
0.68
3 x MTC49
MTC49
MTC49
3 x STT49
STT49
STT49