Schneider Electric EJB34020 Circuit Breaker 3 Pole

Schneider Electric's Square D EJB34020 is a 3-pole, 20-amp miniature circuit breaker designed for 480Y/277 VAC three‑phase power, part of the EJB family with an E‑Frame bolt‑on installation for secure panelboard engagement. It delivers a short‑circuit current rating up to 100 kAIC at 480Y/277 VAC, making it suitable for commercial and light industrial distribution panels that require robust fault protection. The unit is a 3‑pole device, enabling protection of all three phases in a single breaker, and its bolt‑on mounting and E‑Frame construction support straightforward replacement or upgrade in compatible Square D panels. This model carries Trade Agreement Act (TAA) compliance, aligning with procurement requirements in many public sector and institutional environments. Use cases include protecting branch circuits feeding motors, conveyors, lighting, or other 3‑phase equipment in 480Y/277 VAC systems, where reliable overcurrent protection and standardized 3‑pole protection are needed. In typical installations, it is selected when a 20 A, 3P device is required and a bolt‑on, 480 V class breaker is compatible with the panel’s bus design.