The STMicroelectronics BTA16-700CWRG is a Snubberless™ Alternistor triac in a TO-220-3 through-hole package, rated for 700 V off-state blocking voltage and 16 A RMS on-state current.
Gate drive and trigger characteristics
With a maximum gate trigger current (Igt) of 35 mA and a maximum gate trigger voltage (Vgt) of 1.3 V, this triac can be driven directly from a microcontroller I/O pin through a series resistor, or from an optocoupler output. The 35 mA maximum hold current (Ih) means the triac will reliably latch on once triggered and will commutate off cleanly when the load current drops below that threshold near the AC zero-crossing. These trigger levels are standard for the 16 A triac class and compatible with common driver ICs like the MOC3063 or discrete transistor drive stages.
Surge current and thermal capability
The BTA16-700CWRG is rated for a non-repetitive surge current (Itsm) of 160 A at 50 Hz and 168 A at 60 Hz. This surge rating covers inrush from incandescent lamp loads, motor start-up, and capacitor charging — common events in AC mains switching.
There is no official ST replacement listed for this specific order code; a pin-compatible replacement within the BTA16 family would need to be qualified against the same 700 V / 16 A ratings and Snubberless Alternistor characteristics.