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The KC34150 Square D 3P 150A 480V circuit breaker is designed for superior protection in industrial applications. With a 65KA short-circuit current rating, it offers reliable performance and safety for your electrical systems. Ideal for 3-phase systems, this breaker ensures optimal efficiency and peace of mind in your operations.
I-Line plug-in breakers like the KC34150 connect via Square D's proprietary I-Line jaw system, allowing tool-free installation and removal directly onto the I-Line bus. Bolt-on KC breakers use stud-and-nut connections to the bus. The two mounting styles are not interchangeable, so it's important to match the breaker type to your specific panelboard or switchboard bus configuration.
Square D's KC-frame I-Line series has seen product-line transitions over the years, and certain configurations may be discontinued or have limited availability through standard channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers — contact us for availability and we'll source it for you, whether new, surplus, or reconditioned.
Yes. The KC34150's 150A, 3-pole, 480V rating makes it suitable for motor branch-circuit and feeder protection in industrial 3-phase systems, subject to motor FLA, code-required sizing rules (CEC/NEC), and any manufacturer derating requirements. Always verify the breaker's trip curve and your motor's FLA against applicable code requirements before installation.
