STD18GKXX Datasheet, PDF (4/4 Pages) Sirectifier Semiconductors – Thyristor-Diode Modules

STD18GKXX
Thyristor-Diode Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT18
STD/SDT18
STD/SDT18
Fig. 8 Transient thermal impedance
junction to case (per thyristor)
R_thJC for various conduction angles d:
d
DC
180^oC
120^oC
60^oC
30^oC
R_thJC (K/W)
1.3
1.35
1.39
1.42
1.45
Constants for Z_thJC calculation:
i
R_thi (K/W)
t_i (s)
1
0.018
0.0033
2
0.041
0.0216
3
1.241
0.191
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor)
R_thJK for various conduction angles d:
d
DC
180^oC
120^oC
60^oC
30^oC
R_thJK (K/W)
1.5
1.55
1.59
1.62
1.65
Constants for Z_thJK calculation:
i
R_thi (K/W)
t_i (s)
1
0.018
0.0033
2
0.041
0.0216
3
1.241
0.191
4
0.2
0.46
P4
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