This Cutler-Hammer 400A MAIN BREAKER PANELBOARD 480Y/277V 3∅ 4W 18 CIRCUIT PRL-4B is a circuit protection device manufactured by Cutler-Hammer. It provides overcurrent protection, breaking the circuit automatically if current exceeds a safe level. Key specifications noted on this listing include 400A. It is commonly in equipment protection and branch-circuit wiring applications.
