The ST BTA08-800BWRG is an 800 V, 8 A RMS Snubberless Alternistor triac in a TO-220AB insulated full-pack package. It is designed for AC switching applications where a standard triac would need external snubber networks — the Snubberless construction handles high dv/dt without one, simplifying the BOM and board layout. Typical uses include solid-state relays, motor speed controllers, lighting dimmers, and industrial heating controls.
Package and mounting — TO-220AB insulated
The TO-220-3 Full Pack (supplier device package TO-220AB Insulated) is a through-hole package with the tab fully isolated. No additional insulating pad or bushing is required when mounting to a grounded heatsink. The full-pack construction also improves thermal cycling reliability compared to a non-isolated TO-220 with a separate insulator.
This part is Active in ST's portfolio — no last-time-buy notice, no obsolescence risk. It is ROHS3 compliant. For production BOMs, it can be specified without lifecycle concern.