Schneider Electric EJB34100 3P Circuit Breaker

Schneider Electric’s Square D EJB34100 is a three‑pole, 100‑amp miniature circuit breaker in the EJB (E‑Frame) family, designed for bolt‑on mounting in 480Y/277VAC three‑phase systems. It employs a thermal‑magnetic trip mechanism to provide long‑time overload protection plus instantaneous magnetic operation, helping quickly clear short‑circuit faults. The unit is rated for a maximum interrupting capacity up to 100 kA, making it suitable for higher fault‑current environments, and it is offered as a 3P, 100A protection device within commercial panels that accept Square D EJB‑series breakers. The model is listed as Square D by Schneider Electric and carries a TAA‑compliant designation for procurement in regulated settings. Its bolt‑on mounting and EJB framing support straightforward installation in compatible distribution panels or switchgear, serving as a reliable protection option for feeders and branch circuits operating at 480Y/277V.