Square D EJB34030 is a three‑pole, bolt‑on molded‑case circuit breaker in the E‑Frame family designed for 480Y/277 VAC systems and a 30 A rating. It occupies three spaces in Square D NF panelboards and similar enclosures, offering secure bolt‑on mounting for reliable three‑phase protection. The device provides thermal‑magnetic overcurrent protection with an interrupt rating of 65 kAIC at 480 V (some literature also lists a 100 kAIC rating for certain configurations). This makes it suitable for protecting three‑phase loads up to 30 A, including motors and other commercial/industrial equipment in panelboard installations.
