BUY BT137-600 https://www.utsource.net/itm/p/11227991.html

Description: The BT137-600 is a TRIAC, a three terminal bidirectional, thyristor device, which is used to control the current in both directions. Features: Low on-state voltage Low gate trigger current High commutation capability High surge current capability Low thermal resistance Applications: Motor control Light dimmers Heating control AC switching (For reference only)