View bta208b datasheet:

Philips Semiconductors Product specification Three quadrant triacs BTA208B series B high commutation GENERAL DESCRIPTION QUICK REFERENCE DATA Glass passivated high commutation SYMBOL PARAMETER MAX. MAX. MAX. UNIT triacs in a plastic envelope suitable for surface mounting, intended for use in BTA208B- 500B 600B 800B circuits where high static and dynamic VDRM Repetitive peak off-state 500 600 800 V dV/dt and high dI/dt can occur. These voltages devices will commutate the full rated IT(RMS) RMS on-state current 8 8 8 A rms current at the maximum rated ITSM Non-repetitive peak on-state 65 65 65 A junction temperature, without the aid current of a snubber. PINNING - SOT404 PIN CONFIGURATION SYMBOL PIN DESCRIPTION mb 1 main terminal 1 T2 T1 2 main terminal 2 3 gate 2 mb