STT49 Ver la hoja de datos (PDF) - Sirectifier Electronics
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STT49 Datasheet PDF : 4 Pages
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STT49
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
33 xx MSTTC4499
MSTTC4499
MSTTC4499
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)
0.53
0.55
0.58
0.6
0.62
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
0.015
0.0035
2
0.026
0.02
3
0.489
0.195
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)
0.73
0.75
0.78
0.8
0.82
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
0.015
0.0035
2
0.026
0.02
3
0.489
0.195
4
0.2
0.68
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