The Eaton NSB GFTCB140 miniature circuit breaker is a single-pole (1P) overcurrent protection device rated 40 A for 120/240 V AC operation on 50/60 Hz systems. It interrupts current in the event of overloads or faults to protect conductors and equipment inside electrical distribution panels. This NSB GF-series model is intended for standard branch-circuit protection in residential or light commercial installations requiring compact, reliable protection at 120/240 V AC.
