Westinghouse E1020-B Type E Bolt-On Circuit Breaker

The Westinghouse E1020-B Type E Bolt-On Circuit Breaker is a 20 A, 120 VAC single-pole protective device intended for bolt-on mounting in low-voltage electrical distribution. It provides overload and short-circuit protection for branch circuits in industrial and commercial applications, including panelboards, automation systems, lighting circuits, and machinery power distribution. The 1-pole, 1-phase design supports reliable interruption with manual reset operation, while bolt-on mounting ensures secure installation in service panels and control equipment. This breaker is widely used by maintenance electricians, OEMs, and facility technicians for replacing legacy units and maintaining panel infrastructure. Common replacements include Eaton BAB1020, Siemens BQ1B020, and Square D QOB120, underscoring its compatibility with standard distribution and control gear.