What this triac is and where it fits
The STMicroelectronics T1210T-8T is a sensitive-gate logic-level triac rated for 800 V off-state voltage and 12 A RMS on-state current. Packaged in a through-hole TO-220-3, it is designed for AC load switching in applications like solid-state relays, motor speed controllers, lighting dimmers, and heater controls. The sensitive gate (10 mA max Igt) allows direct triggering from low-voltage logic or microcontroller GPIO without an additional driver transistor.
Lifecycle and sourcing posture
The T1210T-8T carries an active lifecycle status and is ROHS3 compliant. There is no last-time-buy or obsolescence risk on this line item. The part is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time against an RFQ.