Square D FA34040 I Line Plug In Molded Case Circuit Breaker

Square D FA34040 Molded Case Circuit Breaker is an I-Line plug-in, three-pole, 40-amp device designed for 480-volt three-phase systems. This thermal-magnetic MCCB provides long-time and instantaneous overcurrent protection for feeders and motors, with an 18 kA interrupting rating at 480 VAC to help safeguard downstream equipment. It features line-side I-Line connectors and load-side lugs that accept aluminum or copper conductors from 14 AWG to 1/0 AWG, enabling flexible wiring in industrial panels. The FA34040 is UL and CSA certified and intended for use in compatible Square D I-Line panelboards and assemblies, making it a standard choice for protecting 3-phase circuits in 480V industrial applications.