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The BJA34100 Square D 3P 100A circuit breaker is designed for industrial applications, featuring a 480/277V rating and a robust 65KA interrupting capacity. This reliable I-Line breaker ensures optimal protection for your electrical systems, making it an essential choice for commercial environments where safety and performance are paramount.
The BJA34100 is a molded-case breaker built specifically for Square D's I-Line plug-in bus system. It can replace other I-Line breakers of the same frame size, pole count (3P), and equal or lesser ampere rating only if the panelboard or switchboard is rated for 65kA and the voltage matches (480/277V). Always verify the replacement breaker's trip rating, frame, and AIC match the original before swapping — our team can help cross-reference your existing breaker.
The Square D BJA frame I-Line series has seen changes over the years as product lines evolve. Availability can vary, and some configurations may be hard to find through standard distribution channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers — contact us for current stock status or to source a reconditioned unit if new stock is unavailable.
The BJA34100 is rated for 480/277V AC, which means it is also suitable for use on lower-voltage systems (such as 208Y/120V or 240V) since the voltage rating represents the maximum. However, the interrupting rating (kA) must still meet or exceed the available fault current at the installation point on any voltage system. Confirm your system specs with a licensed electrician or contact us if you have questions about your specific application.
