This is an 8A 400V Triac, bidirectional triode thyristor, in a TO-220AB package.
Maximum repetitive peak and off-state voltage (VDRM): 400 V
Maximum RMS on-state current (IT(RMS)): 8 A
Non repetitive surge peak on-state current (ITSM): 100 A
Triggering gate voltage (VGT): 2.5 V
Peak on-state voltage drop (VTM): 1.55 V
Triggering gate current (IGT): 50 mA
Holding current (IH): 40 mA
WARNING
