The heat sink tab is isolated.
BTA12-600B 12A 600V Isolated Triac
BTB12-800B TRIAC 12A, 600V UK Seller
BTA12-600TW 12A 600V TRIAC TO-220, ST low gate trigger current version-ref:Txyx
BTA12-600B 12A 600V TRIAC TO-220 - ref:Txyy
TI SCR Thyristor TIC236M, 600V 12A 50mA, TO-220 3-Pin
STM BTA12-600B ORIGINAL Medium Current TRIAC 600V 12A TO220 UK STOCK x3pcs