4 / 4 page
STT116
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
0.22
180
oC
0.23
120
oC
0.25
60
oC
0.27
30
oC
0.28
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.0066
0.0019
2
0.0678
0.0477
3
0.1456
0.344
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
0.42
180
oC
0.43
120
oC
0.45
60
oC
0.47
30
oC
0.48
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.0066
0.0019
2
0.0678
0.0477
3
0.1456
0.344
4
0.2
1.32
3 x STT116