General Electric THQB1120-STI U Shunt Trip Unit is a remote-tripping accessory for GE circuit breakers, designed to trip a 1-pole breaker when energized by a 120V control circuit. It is rated for 20A at 120V and configured for a single-pole (1P) installation. The 120V shunt-trip function allows a separate circuit to initiate the breaker trip, enabling remote shutdown when safety or automation requires it.
