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The BJA34050 SQUARE D 3P 50A circuit breaker offers reliable overcurrent protection for your electrical systems. Designed for 480/277V applications, this 3-pole breaker features a robust 65KA interrupting rating, ensuring safety and performance in demanding environments. Ideal for industrial and commercial use, it meets high-quality standards for reliable operation.
The BJA34050 uses Square D's I-Line plug-in mounting and is designed for Square D I-Line panelboards and switchboards rated for 480/277V, 3-phase service — such as NF, NQOD, and similar I-Line compatible equipment. It is not a residential breaker and will not fit QO or Homeline loadcentres. Send us your panelboard model number and we'll confirm compatibility.
The BJA frame series has been largely superseded by newer Square D MCCB lines, making the BJA34050 difficult to source through standard channels. Northern Breaker Group specializes in hard-to-find and obsolete breakers — contact us for current stock availability and lead times.
The BJA34050 is rated for 480/277V systems. While a higher-rated voltage breaker can often be applied on a lower-voltage system, you should verify with your engineer or authority having jurisdiction (AHJ) that the breaker's full specifications — including its 65kA interrupting rating at the system voltage — meet your application requirements before installation.
