Westinghouse GHB1020 Molded Case Circuit Breaker

The Westinghouse GHB1020 is a 1-pole, 20 Amp bolt-on molded case circuit breaker rated for 277 VAC and 125 VDC, designed for industrial and commercial electrical distribution where dependable single‑phase protection is required. It delivers thermal-magnetic overcurrent and short-circuit protection for branch circuits and equipment, and is commonly installed in panelboards, switchgear, lighting systems, and automation panels. The unit is part of the GHB series, mounts bolt-on, and supports 50/60 Hz service for applications such as lighting panels, HVAC, automation equipment, industrial machinery, and other facilities operating on 277 VAC or 125 VDC networks. Common replacements include Eaton GHB1020, Siemens BQ1B020, and Square D QOB120.