View st230s datasheet:

Bulletin I25163 rev. B 01/94 ST230S SERIES PHASE CONTROL THYRISTORS Stud Version Features 230A Center amplifying gate Hermetic metal case with ceramic insulator (Also available with glass-metal seal up to 1200V) International standard case TO-209AB (TO-93) Threaded studs UNF 3/4 - 16UNF2A or ISO M16x1.5 Compression Bonded Encapsulation for heavy duty operations such as severe thermal cycling Typical Applications DC motor controls Controlled DC power supplies AC controllers Major Ratings and Characteristics Parameters ST230S Units IT(AV) 230 A @ TC 85 °C IT(RMS) 360 A ITSM @ 50Hz 5700 A @ 60Hz 5970 A I2t @ 50Hz 163 KA2s @ 60Hz 149 KA2s VDRM/VRRM 400 to 1600 V case style tq typical 100 µs TO-209AB (TO-93) TJ - 40 to 125 °C www.irf.com 1 ST230S Series Bulletin