Square D EH34040 Molded Case Circuit Breaker

Square D by Schneider Electric EH34040 is a three-pole, 40-amp molded‑case circuit breaker built for 480Y/277 VAC three‑phase distributions. It uses thermal‑magnetic trip protection for reliable overcurrent and short‑circuit interrupting, with an interrupting rating of 14 kA at 480Y/277 VAC, and it is designed for plug‑in mounting in EH‑series enclosures and NEH panelboards. The unit accepts 14–2 AWG aluminum or copper conductors, supporting compact, flexible wiring in commercial and light‑industrial installations. As part of the EH family, the EH34040 provides fast replacement and predictable protection for 3‑phase feeders, delivering consistent performance in harsh environments and helping maintain essential electrical distribution without compromising safety or system uptime.