The BTB08-600CRG is a standard TRIAC from STMicroelectronics, rated for 600 V off-state and 8 A RMS on-state current. It is a single-device configuration in a TO-220-3 through-hole package, supplied in tube packaging. The gate trigger current (Igt) is 25 mA max, with a gate trigger voltage (Vgt) of 1.3 V max and a holding current (Ih) of 25 mA max. These thresholds mean a standard logic-level driver or microcontroller GPIO with a series resistor can trigger it directly, though a sensitive-gate variant would need less drive. Non-repetitive surge current capability is 80 A at 50 Hz and 84 A at 60 Hz — this handles the inrush from a motor start or capacitor charging without the device failing short.
Lifecycle and compliance
It is ROHS3 compliant, meeting EU material restrictions for lead, mercury, cadmium, and phthalates.
The TO-220-3 through-hole package has a standard 2.54 mm pitch lead frame. The tab is the collector/drain — it requires isolation from the heatsink unless the heatsink is at the same potential.