P
tot
2000
W
R
thKA
K/W
0.04
0.06
0.08
0.1
0.15
0.2
0.3
Circuit
W3
3xPSKT170
3xMCC170
1500
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
1000
500
0
0
100
200
300
400
A
0
25
50
75
100
125
°C
150
I
RMS
T
A
0.25
Z
thJC
K/W
0.20
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
R
thJC
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJC
(K/W)
0.160
0.171
0.180
0.203
0.247
0.15
0.10
30°
60°
120°
180°
DC
0.05
Constants for Z
thJC
calculation:
i
R
thi
(K/W)
0.0077
0.0413
0.096
0.0149
t
i
(s)
0.00054
0.098
0.54
12
10
-2
10
-1
10
0
10
1
10
2
0.00
10
-3
s
t
1
2
3
4
0.30
K/W
Z
thJK
0.25
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R
thJK
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJK
(K/W)
0.200
0.211
0.220
0.243
0.287
0.20
0.15
30°
60°
120°
180°
DC
0.10
0.05
Constants for Z
thJK
calculation:
i
R
thi
(K/W)
0.0077
0.0413
0.096
0.0149
0.04
t
i
(s)
0.00054
0.098
0.54
12
12
s
t
10
2
0.00
10
-3
10
-2
10
-1
10
0
10
1
1
2
3
4
5
POWERSEM GmbH, Walpersdorfer Str. 53
2002 POWERSEM reserves the right to change limits, test conditions and dimensions
D - 91126 Schwabach
Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
POWERSEM [ POWERSEM GMBH ]
