This PENN PANEL 100 AMP MAIN BREAKER PANELBOARD 420/277 VAC 3∅ 4W 42 CIRCUIT is a circuit protection device. It serves as the protective device in an electrical circuit, stopping current flow when a fault is detected. Key specifications noted on this listing include 277 VAC, 100 AMP. It is commonly in OEM equipment and MRO replacement for electrical protection devices.
