STD253 Datasheet, PDF (4/4 Pages) Sirectifier Semiconductors – Thyristor-Diode Modules, Diode-Thyristor Modules

STD/SDT253
Thyristor-Diode Modules, Diode-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STD/SDT253
0.15
K/W
Z_thJC
0.10
0.05
0.00
10^-3
0.20
K/W
Z_thJK
0.15
0.10
0.05
0.00
10^-3
10^-2
10^-1
10⁰
3 x STD/SDT253
10^-2
10^-1
10⁰
Fig. 8 Transient thermal impedance
30°
junction to case (per thyristor or
DC
diode)
R_thJC for various conduction angles d:
d
DC
180^oC
120^oC
60^oC
30^oC
R_thJC (K/W)
0.129
0.131
0.131
0.132
0.132
10¹
s
t
Constants for Z_thJC calculation:
i
1
10²
2
3
R_thi (K/W)
0.0035
0.0165
0.1091
t_i (s)
0.099
0.168
0.456
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
30°
DC
or diode)
R_thJK for various conduction angles d:
d
R_thJK (K/W)
DC
180^oC
120^oC
60^oC
30^oC
0.169
0.171
0.172
0.172
0.173
10¹
s
t
Constants for Z_thJK calculation:
i
1
10²
2
3
4
R_thi (K/W)
0.0033
0.0159
0.1053
0.04
t_i (s)
0.099
0.168
0.456
1.36