STT181 Ver la hoja de datos (PDF) - Sirectifier Electronics
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STT181 Datasheet PDF : 4 Pages
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STT181
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STT181
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
RthJC for various conduction angles d:
d
DC
180oC
120oC
60oC
30oC
RthJC (K/W)
0.155
0.167
0.176
0.197
0.227
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
0.0072
0.001
2
0.0188
0.08
3
0.129
0.2
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
RthJK for various conduction angles d:
d
DC
180oC
120oC
60oC
30oC
RthJK (K/W)
0.225
0.237
0.246
0.267
0.297
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
0.0072
0.001
2
0.0188
0.08
3
0.129
0.2
4
0.07
1.0
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