16 A Snubberless Alternistor for Inductive Loads
The STMicroelectronics BTB16-800CWRG is an Alternistor - Snubberless triac rated for 800 V off-state voltage and 16 A RMS on-state current in a TO-220 through-hole package. This part is from the Snubberless™ series, designed for high dv/dt immunity.
Parametric Fit: Surge, Gate Drive, and Temperature
The 16 A RMS rating sets the continuous load ceiling. The 160 A / 168 A non-repetitive surge capability handles start-up spikes. Gate trigger current is 35 mA max with a 1.3 V max gate trigger voltage. This is a standard logic-level drive — a microcontroller GPIO through a transistor or optocoupler can fire it directly. The 35 mA hold current means the triac latches on once triggered and only turns off when the load current drops below that threshold near the AC zero-cross. At 125°C junction, the on-state current must be derated per the datasheet curve.
The base product number is BTB16, which covers multiple voltage and sensitivity grades in the same TO-220 footprint.