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The EJB34070 SQUARE D 3P 70A 480V circuit breaker offers reliable protection for your electrical systems. Designed for three-phase applications, it features a current rating of 70 amps and operates at 480 volts. Built for durability and performance, this breaker ensures optimal safety in your industrial or commercial settings.
The EJB34070 carries a 65kA short-circuit interrupting rating at 480V. This means it can safely clear fault currents up to 65,000 amps without catastrophic failure. For industrial and commercial installations, you must verify that the available fault current at the point of installation does not exceed this rating — if it does, a higher-AIC breaker or current-limiting fuse upstream is required to maintain code compliance.
The Square D EJB frame series has been superseded by newer MCCB lines in Square D's current catalogue. However, Northern Breaker Group specializes in obsolete and hard-to-find breakers, and we maintain stock of legacy Square D MCCBs. Contact our Calgary, Edmonton, or Vancouver counters and we'll check availability or source a verified replacement for you.
Yes. A 3-pole 70A 480V MCCB like the EJB34070 is commonly used for motor branch-circuit protection in commercial and industrial settings. When applying it as a motor disconnecting means or branch-circuit short-circuit protection, ensure the breaker's ampere rating is sized in accordance with the motor's full-load current and CEC (or NEC) motor protection rules — typically 250% of FLA for inverse-time breakers. Consult your engineer or inspector for your specific application.
