16 A Snubberless™ triac — what it is, what it does
The STMicroelectronics BTB16-600BWRG is a Snubberless™ alternistor triac rated for 16 A RMS on-state current and 600 V off-state voltage, housed in a through-hole TO-220-3 package. It switches AC loads like motors, heaters, and lighting without requiring an external RC snubber for many inductive loads, thanks to the Snubberless™ alternistor structure that provides high commutation capability.
Snubberless™ alternistor — why it saves BOM cost
The Snubberless™ alternistor structure is designed for high dV/dt capability, which means it can commutate inductive loads (motors, solenoids, transformers) without the RC snubber that a standard triac would need to prevent false turn-on. That saves one resistor and one capacitor per triac on the BOM, plus the PCB area and assembly cost. For a panel with multiple triac channels, the savings add up. The trade-off is a slightly higher on-state voltage drop compared to a standard triac, but for most 16 A loads the difference is negligible in thermal dissipation.
Mounting and replacement in the field
In a field-service scenario, you can swap it with basic tools — a soldering iron and a screwdriver — no hot-air station needed. The tab is the MT2 terminal, so if you are using a shared heatsink, ensure electrical isolation (mica washer or sil-pad) unless the circuit topology allows a common heatsink.