Thomas & Betts TB2125 Molded Case Circuit Breaker

The Thomas & Betts TB2125 is a 2-pole, 125 A molded case circuit breaker that provides thermal-magnetic overcurrent and short-circuit protection for 120/240 VAC single-phase distribution systems. Designed for plug-in mounting in TB Series load centers and panelboards, it features fixed long-time and instantaneous trip functions with a 10 kA interrupting rating at 240 VAC. Weighing about 2 lb (0.9 kg), this non-interchangeable trip unit is suitable for protecting feeders, HVAC equipment, motors, and lighting circuits across residential, commercial, and industrial applications; common replacements include TB2100, TB2150, and TB2125H.