Square D EZM31600GCBU 3 Phase Main Circuit Breaker

EZM31600GCBU is a 3-phase main circuit breaker unit for Schneider Electric's EZ Meter-Pak meter centers, delivering a 1600 A main rating and 65 kA SCCR for high-fault protection. Designed for 208Y/120 VAC three-phase, four-wire systems and intended for underground service, it mounts in an EZ Meter-Pak enclosure with a 1200 A bus rating to support heavy loads while protecting downstream equipment. As part of the EZ Meter-Pak family, this main breaker unit provides centralized overcurrent protection and is compatible with OH/UG configurations and Type 3R enclosures, with optional ERMS (Energy Reduction Maintenance Switch) configurations to simplify maintenance in remote installations. The combination of steel enclosure and aluminum/copper busbars supports robust performance in industrial environments. Common applications include commercial buildings, industrial facilities, and data centers where Schneider Electric metering and power-distribution systems are used to meet high-current distribution needs, and the EZM31600GCBU offers a robust, scalable solution for top-tier electrical distribution governance.