The Square D EDB34125 is a 3-pole, 125 amp, bolt-on molded case circuit breaker designed for use in lighting and power distribution panelboards, especially in the Square D NF series. It operates at 480Y/277 volts AC and provides both overload and short-circuit protection through a thermal-magnetic trip unit. With an interrupting rating of up to 25 kA, it ensures reliable protection in commercial and industrial electrical systems. The breaker features Visi-Trip™ technology for easy identification of tripped units. It is calibrated for use in environments up to 40°C and meets HACR, UL, and RoHS compliance standards. Built for durability, it supports copper or aluminum conductors and is commonly used in panelboard applications requiring robust circuit protection.