STD49 Datasheet, PDF (4/4 Pages) Sirectifier Semiconductors – Thyristor-Diode Modules, Diode-Thyristor Modules

STD/SDT49
Thyristor-Diode Modules, Diode-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT49
STD/SDT49
STD/SDT49
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
R_thJC for various conduction angles d:
d
DC
180^oC
120^oC
60^oC
30^oC
R_thJC (K/W)
0.53
0.55
0.58
0.6
0.62
Constants for Z_thJC calculation:
i
R_thi (K/W)
t_i (s)
1
0.015
2
0.026
3
0.489
0.0035
0.02
0.195
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R_thJK for various conduction angles d:
d
DC
180^oC
120^oC
60^oC
30^oC
R (K/W)
thJK
0.73
0.75
0.78
0.8
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