This Square D AMP MAIN BREAKER LOADCENTER 240/120 VAC 3∅ 4W 40 CIR Q0440M150 is a circuit protection device manufactured by Square D. It provides overcurrent protection, breaking the circuit automatically if current exceeds a safe level. Key specifications noted on this listing include 120 VAC, 150 AMP. It is commonly in equipment protection and branch-circuit wiring applications.
