STD27 Datasheet, PDF (4/4 Pages) Sirectifier Semiconductors – Thyristor-Diode Modules, Diode-Thyristor Modules

STD/SDT27
Thyristor-Diode Modules, Diode-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT27
STD/SDT27
STD/SDT27
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)
0.88
0.92
0.95
0.98
1.01
Constants for Z_thJC calculation:
i
R (K/W) t (s)
thi
i
1
0.019
0.0031
2
0.029
0.0216
3
0.832
0.191
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_thJK (K/W)
1.08
1.12
1.15
1.18
1.21
Constants for Z_thJK calculation:
i
R_thi (K/W)
t_i (s)
1
0.019
0.0031
2
0.029
0.0216
3
0.832
0.191
4
0.2
0.45