Sensitive-gate triac for direct logic drive
The BTB08-600SWRG is an 8 A RMS sensitive-gate triac from STMicroelectronics, housed in a standard TO-220-3 through-hole package. Its 10 mA maximum gate trigger current (Igt) means it switches directly from a microcontroller I/O pin, an optocoupler output, or a low-power logic gate — no driver transistor needed between the control signal and the gate.
600 V off-state and surge capability
Rated for 600 V off-state blocking, this triac comfortably handles 230 VAC and 277 VAC mains with margin for normal line transients. The non-repetitive surge current rating of 80 A at 50 Hz and 84 A at 60 Hz (Itsm) tells you it can survive the inrush from a motor start, a lamp cold filament, or a capacitive load without failing short.
Temperature range and package fit
The TO-220-3 package has a metal tab for heatsinking — bolt it to a chassis or a dedicated heatsink when the RMS current exceeds about 4 A in free air, or derate per the datasheet curve.
Active lifecycle and compliance
Listed as Active by STMicroelectronics — no end-of-life or last-time-buy risk for ongoing production or new designs. Fully ROHS3 compliant, so no exemption paperwork needed for EU, UKCA, or global markets.