The Square D AMP MAIN BREAKER PANELBOARD 120/208 VAC 3Ø 4W NQOB44-53943-8A is a circuit protection device from Square D. It provides overcurrent protection, breaking the circuit automatically if current exceeds a safe level. Key specifications noted on this listing include 208 VAC, 100 AMP, 8A. It is commonly in panel builds and electrical system retrofits.
