JJA36250U43X – SQUARE D 3P250A 600V BREAKER

The JJA-frame is a J-frame bolt-on MCCB rated for commercial and industrial panelboards and switchboards designed to accept Square D J-frame bolt-on breakers. It is not compatible with residential QO or Homeline loadcentres. Because exact panelboard compatibility depends on your specific enclosure and bus configuration, we recommend sending us your panelboard model number so we can confirm the fit before you order.

Northern Breaker Group specializes in obsolete and hard-to-find breakers, and we maintain stock of discontinued Square D MCCB units including JJA-frame variants. Availability can change, so contact our Calgary, Edmonton, or Vancouver counter or request a quote online to check current stock status for this specific catalogue number.

Yes — the JJA-frame 250A 3-pole 600V MCCB is well-suited for both feeder protection and motor branch-circuit protection in commercial and industrial systems. However, for motor protection you must verify that the breaker's instantaneous trip setting and interrupting rating are appropriate for your motor's full-load current and the available fault current at the installation point. Consult your electrical engineer or local authority having jurisdiction (AHJ) to confirm compliance with the Canadian Electrical Code (CEC).