ABB THQB2120GFT Bolt On Ground Fault Circuit Breaker

ABB THQB2120GFT is a 20-amp, two-pole ground fault circuit interrupter (GFCI) bolt-on breaker for 120/240-volt, single-phase electrical systems. Part of ABB’s Q-Line THQB family, this bolt-on unit protects both hot conductors in a 2-pole circuit and delivers fast interruption of ground faults to help reduce shock hazards. Designed for installation in compatible ABB panelboards that accept THQB bolt-on breakers, it provides GFCI protection on circuits requiring such safety features in residential and light commercial applications. The 20A rating makes it suitable for general-purpose branch circuits, including receptacle and lighting branches where GFCI protection is mandated or desired. The THQB2120GFT is one of ABB’s modern bolt-on GFCI offerings and aligns with ABB’s family of mini circuit breakers, ensuring consistent mounting, electrical compatibility, and reliable performance within ABB’s TEY/Q-Line product line.