Westinghouse NSB EB2040 Molded Case Circuit Breaker

Westinghouse NSB EB2040 Molded Case Circuit Breaker is a 2-pole, 40A thermal-magnetic MCCB built for industrial electrical distribution and branch-circuit protection. This Circuit Breaker is commonly installed in motor control panels, switchboards, industrial machinery, and commercial power distribution equipment to provide dependable overload and short-circuit protection. It is designed for overcurrent protection of branches and connected equipment and features molded-case industrial construction, manual reset and switching capability, and compatibility with control panels and distribution equipment. The EB2040 is rated for 40 amps on two poles, and its thermal-magnetic mechanism delivers reliable protection against both overloads and short circuits in industrial and commercial systems. Maintenance electricians, OEMs, and facility engineers use it for electrical system maintenance, equipment protection, and replacement of obsolete breakers. Common replacements include Eaton BAB2040, Siemens BQ2B040, and Square D QOB240, illustrating its role in standard industrial protection schemes.