Westinghouse 1276C23H02 Circuit Breaker Trip Unit

Westinghouse 1276C23H02 Trip Unit is the overcurrent protection module for Westinghouse circuit breakers, rated at 300 amperes. Identified by part number 1276C23H02, this trip unit governs the breaker’s response to overload and short-circuit conditions, enabling automatic interruption of current to protect electrical circuits. Designed for use with compatible Westinghouse panels and switchgear, this unit provides the necessary sensing and tripping functions as part of the breaker assembly. The 300 A rating indicates the maximum continuous current at which the circuit should be allowed to run before the trip is activated. This replacement part is intended for installations where a 300 A trip unit is specified and where Westinghouse equipment is used in the distribution system. In practice, a trip unit like this is installed inside the breaker to monitor current flow and trigger the breaker’s opening mechanism when faults are detected, helping to safeguard feeders and branch circuits in commercial and industrial electrical layouts. Part details: Westinghouse brand, 1276C23H02 designation, 300 A rating. Verify that this exact trip unit matches your breaker model and panel configuration before installation.