View bta20-600b isc datasheet:

INCHANGE Semiconductor isc Thyristors BTA20-600B DESCRIPTION ·With TO-220 packaging ·Operating in 4 quadrants ·High commutation capability ·Minimum Lot-to-Lot variations for robust device performance and reliable operation APPLICATIONS ·Switching applications ·Phase control ·Static switching on inductive or resistive load ABSOLUTE MAXIMUM RATINGS(T =25℃) a SYMBOL PARAMETER MAX UNIT V Repetitive peak off-state voltage 600 V DRM V Repetitive peak reverse voltage 600 V RRM I Average on-state current Tc=70℃ 20 A T(RSM) 50HZ 200 I Surge non-repetitive on-state current A TSM 60HZ 210 P Average gate power dissipation ( over any 20 ms period ) Tj=125℃ 1 W G(AV) T Operating junction temperature -40~125 ℃ j T Storage temperature -40~150 ℃ stg isc we