View bt137-800 isc datasheet:

INCHANGE Semiconductor isc Triacs BT137-800 FEATURES ·With TO-220 package ·Glass passivated triacs in a plastic envelope, for use in general purpose bidirectional switching and phase control applications, which are intendedto be interfaced directly to microcontrollers, logic integrated circuits and other low power gate trigger circuits. ·Minimum Lot-to-Lot variations for robust device performance and reliable operation ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER MIN UNIT V Repetitive peak off-state voltage 800 V DRM V Repetitive peak off-state voltage 800 V RRM I RMS on-state current (full sine wave) 8 A T(RMS) I Non-repetitive peak on-state current 65 A TSM P Peak gate power dissipation 5 W GM P Average gate power dissipation 0.5 W G(AV) T Operating