Square D LAL36350MB Feed-Thru Circuit Breaker is a 350‑amp, three‑pole molded‑case breaker designed for feed‑through (cable‑in/cable‑out) service in Square D panels. It is rated for 600 V AC operation with a 22 kA interrupting rating (22 kAIC) and a 250 VDC rating of 10 kA, and it includes line and load lugs with a thermal‑magnetic trip and a short‑handle MB configuration to allow panel doors to close. The MB suffix designates a main‑breaker unit intended to feed downstream circuits within the same enclosure, providing robust primary protection alongside downstream feeder capability.
