D-470
DISCRETE POWER DIODES and THYRISTORS
DATA BOOK
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 KA2s
@ 60Hz 126 KA
2
s
V
DRM/VRRM
1000 to 1200 V
t
q
range 20 to 30 µs
T
J
- 40 to 125 °C
Parameters ST203S Units
Major Ratings and Characteristics
case style
TO-209AB (TO-93)
ST203S Series
D-472
Voltage V
DRM/VRRM
, maximum V
RSM
, maximum I
DRM/IRRM
max.
Type number Code repetitive peak voltage non-repetitive peak voltage
@ TJ = TJ 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/µs
Case temperature 60 85 60 85 60 85 °C
Equivalent values for RC circuit 47Ω / 0.22µF 47Ω / 0.22µF 47Ω / 0.22µF
I
TM
180oel
180
o
el
100µs
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 @ 76°C 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 I2t for fusing 138 t = 10ms No voltage Initial TJ = TJ max
126 t = 8.3ms reapplied
98 t = 10ms 100% V
RRM
89 t = 8.3ms reapplied
I
2
√t Maximum I2√t for fusing 1380 KA2√s t = 0.1 to 10ms, no voltage reapplied
Parameter ST203S Units Conditions
On-state Conduction
KA2s