The Eaton NSB GDB3040D Molded Case Circuit Breaker (MCCB) is a 3-pole, 40-amp, 120-volt device rated for 50/60 Hz, intended for three-phase service. It belongs to Eaton’s NSB line and is identified by the GDB3040D model name. This MCCB provides overcurrent protection for three-phase circuits in electrical distribution applications requiring a compact molded-case breaker.
