ST203S SERIES
INVERTER GRADE THYRISTORS
Stud Version
205A
D-471
Bulletin I25177/B
Features
All diffused design
Center amplifying gate
Guaranteed high dv/dt
Guaranteed high di/dt
High surge current capability
Low thermal impedance
High speed performance
Typical Applications
Inverters
Choppers
Induction heating
All types of force-commutated converters
I
T(AV)
205
A
@ T
C
85
C
I
T(RMS)
320
A
I
TSM
@
50Hz
5260
A
@ 60Hz
5510
A
I
2
t
@
50Hz
138
KA
2
s
@ 60Hz
126
KA
2
s
V
DRM
/V
RRM
1000 to 1200
V
t
q
range
20 to 30
s
T
J
- 40 to 125
C
Parameters
ST203S
Units
Major Ratings and Characteristics
case style
TO-209AB (TO-93)
Next Data Sheet
Index
Previous Datasheet
To Order
ST203S Series
D-472
Voltage
V
DRM
/V
RRM
, maximum
V
RSM
, maximum
I
DRM
/I
RRM
max.
Type number
Code
repetitive peak voltage
non-repetitive peak voltage
@ T
J
= T
J
max.
V
V
mA
10
1000
1100
12
1200
1300
ELECTRICAL SPECIFICATIONS
Voltage Ratings
ST203S
40
Frequency
Units
50Hz
580
400
900
640
6180
4680
400Hz
570
380
940
650
2980
2150
1000Hz
520
320
930
630
1730
1200
A
2500Hz
370
210
780
510
890
580
Recovery voltage Vr
50
50
50
50
50
50
Voltage before turn-on Vd
V
DRM
V
DRM
V
DRM
Rise of on-state current di/dt
50
50
-
-
-
-
A/
s
Case temperature
60
85
60
85
60
85
C
Equivalent values for RC circuit
47
/ 0.22F
47
/ 0.22F
47
/ 0.22F
I
TM
180
o
el
180
o
el
100
s
I
TM
I
TM
Current Carrying Capability
V
I
T(AV)
Max. average on-state current
205
A
180 conduction, half sine wave
@ Case temperature
85
C
I
T(RMS)
Max. RMS on-state current
320
DC @ 76C case temperature
I
TSM
Max. peak, one half cycle,
5260
t = 10ms
No voltage
non-repetitive surge current
5510
A
t = 8.3ms
reapplied
4420
t = 10ms
100% V
RRM
4630
t = 8.3ms
reapplied
Sinusoidal half wave,
I
2
t
Maximum I
2
t for fusing
138
t = 10ms
No voltage
Initial T
J
= T
J
max
126
t = 8.3ms
reapplied
98
t = 10ms
100% V
RRM
89
t = 8.3ms
reapplied
I
2
t
Maximum I
2
t for fusing
1380
KA
2
s
t = 0.1 to 10ms, no voltage reapplied
Parameter
ST203S
Units
Conditions
On-state Conduction
KA
2
s
To Order
Next Data Sheet
Index
Previous Datasheet
ST203S Series
D-476
Fig. 3 - On-state Power Loss Characteristics
Fig. 1 - Current Ratings Characteristics
Fig. 2 - Current Ratings Characteristics
Fig. 4 - On-state Power Loss Characteristics
To Order
Next Data Sheet
Index
Previous Datasheet
ST203S Series
D-477
Fig. 7 - On-state Voltage Drop Characteristics
Fig. 8 - Thermal Impedance Z
thJC
Characteristic
Fig. 10 - Reverse Recovery Current Characteristics
Fig. 9 - Reverse Recovered Charge Characteristics
Fig. 5 - Maximum Non-repetitive Surge Current
Fig. 6 - Maximum Non-repetitive Surge Current
To Order
Next Data Sheet
Index
Previous Datasheet
PDF 
ZIP