Noark’s Ex9 M-Series Molded Case Circuit Breakers (MCCBs) provide reliable, CSA-certified protection for use in NEMA 1, 3R, and 12 breaker enclosures. Rated up to 600 A / 600 V AC, these breakers meet UL 489 and CSA C22.2 No. 5 standards and are approved for service-entrance use in Canada.
Available in M1–M4 frames, each breaker features thermal-magnetic trip units, lug terminals, and optional neutral kits for 3- or 4-wire systems. When combined with Noark’s X-Series enclosures, they create a fully certified, ready-to-install breaker assembly that simplifies design and code compliance for Canadian contractors and OEMs.