View bta204 datasheet:

Philips Semiconductors Product specification Three quadrant triacs BTA204 series B and C high commutation GENERAL DESCRIPTION QUICK REFERENCE DATA Passivated high commutation triacs in SYMBOL PARAMETER MAX. MAX. MAX. UNIT a plastic envelope intended for use in circuits where high static and dynamic BTA204- 500B 600B 800B dV/dt and high dI/dt can occur. These BTA204- 500C 600C 800C devices will commutate the full rated VDRM Repetitive peak 500 600 800 V rms current at the maximum rated off-state voltages junction temperature without the aid of IT(RMS) RMS on-state current 4 4 4 A a snubber. ITSM Non-repetitive peak on-state 25 25 25 A current PINNING - TO220AB PIN CONFIGURATION SYMBOL PIN DESCRIPTION tab 1 main terminal 1 T2 T1 2 main terminal 2 3 gate G 1 2 3 tab m