RKA36100CU31A – SQUARE D 3P1000A 600V LI BREAKER

Square D's RKA-frame series has seen limited availability through standard distribution channels. Northern Breaker Group specialises in exactly this — obsolete, discontinued, and hard-to-find industrial breakers. We maintain extensive inventory and supplier networks across Canada, so contact us for current stock status and lead times.

The 'LI' designation indicates a Long-time (overload) and Instantaneous (short-circuit) trip unit — a thermal-magnetic configuration providing two-function protection. On most RKA-frame breakers at this rating, the instantaneous trip is fixed; however, some variants include an adjustable instantaneous setting. Confirm your specific suffix requirements with our team to ensure you receive the correct trip profile for your application.

Yes — a 3-Pole 1000A 600V MCCB like the RKA36100CU31A is commonly applied as a main or feeder disconnect in industrial 600V (or 347/600V three-phase) services, provided the switchboard or panelboard is rated for the breaker frame and the installation meets applicable CSA and Canadian Electrical Code (CEC) requirements. Always verify with your engineer of record that the interrupting rating of the breaker meets or exceeds the available fault current at the point of installation.