The Square D i-Line LX36400 S1B circuit breaker 3P 400A 600VAC ARP100 recent calib is a circuit protection device from Square D. It safeguards wiring and connected equipment by opening or isolating the circuit when current exceeds its rated threshold. Key specifications noted on this listing include 600VAC, 400A. It is commonly in OEM equipment and MRO replacement for electrical protection devices.
