{"product_id":"square-d-qmj365-400a-600v-3-pole-fusible-panelboard-switch-qmj-series","title":"Square D QMJ365 – 400A, 600V, 3-Pole Fusible Panelboard Switch – QMJ Series","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D QMJ365\u003c\/strong\u003e is a rugged 3-pole fusible panelboard switch engineered for dependable load disconnect and robust overcurrent protection in three-phase power systems. Rated for 400 A at 600 V, it integrates seamlessly with QMB fusible panelboards to deliver a compact, space-efficient protection solution for demanding industrial and commercial environments.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 400 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003ePoles: 3 (three-phase)\u003c\/li\u003e \u003cli\u003eInterruption rating (KAIC): 200 kAIC\u003c\/li\u003e \u003cli\u003eSeries: QMJ\u003c\/li\u003e \u003cli\u003ePart number: QMJ365\u003c\/li\u003e \u003cli\u003eCompatibility: designed for use with QMB fusible panelboards with appropriate fuse class\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy the QMJ365 matters\u003c\/h3\u003e\n\u003cp\u003eCombining a rugged switching mechanism with fuse-based protection, the QMJ365 provides a clear, dependable load disconnect while interrupting fault currents up to 200 kAIC. This enables rapid isolation of faulty circuits, minimizes collateral damage, and creates safer maintenance windows for technicians working on three-phase systems.\u003c\/p\u003e \u003ch3\u003eWhat sets it apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e3-pole design aligns with standard three-phase feeders, simplifying installation and ensuring balanced protection across all phases.\u003c\/li\u003e \u003cli\u003eBuilt to the durable standards of Square D, reducing downtime and service calls.\u003c\/li\u003e \u003cli\u003ePrecisely engineered to work with QMB fusible panelboards, delivering a cohesive, space-efficient protection solution within your distribution scheme.\u003c\/li\u003e \u003cli\u003eWhen paired with the appropriate fuse class, you gain reliable overcurrent protection alongside a straightforward load disconnect path.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eIndustrial facilities with three-phase motors, conveyors, or heavy equipment requiring reliable load isolation.\u003c\/li\u003e \u003cli\u003ePanelboard upgrades or retrofits where QMB panels are already in service and need a compatible fusible switch.\u003c\/li\u003e \u003cli\u003eNew installations in warehouses or manufacturing lines where space is at a premium and a single integrated protection device simplifies wiring and maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePair the QMJ365 with the correct fuse class as specified for your QMB configuration.\u003c\/li\u003e \u003cli\u003eVerify proper three-phase wiring and clear labeling on the panelboard to facilitate quick isolation during fault conditions.\u003c\/li\u003e \u003cli\u003eSchedule periodic inspections of connections and ensure fuse availability aligns with your maintenance plan.\u003c\/li\u003e \u003cli\u003eEngage qualified personnel to install in accordance with local electrical codes and standards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Square D QMJ365 is more than a switch — it's a purpose-built combination of load disconnect and overcurrent protection that helps keep three-phase distributions running smoothly while simplifying maintenance and safety compliance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Schneider Electric \/ Square D","offers":[{"title":"Default Title","offer_id":46361518899362,"sku":"QMJ365","price":10.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/panel_mount_switches_p1_c89405bb-ab51-477c-839f-a465d0f0b161.png?v=1764703957","url":"https:\/\/www.ampstate.com\/products\/square-d-qmj365-400a-600v-3-pole-fusible-panelboard-switch-qmj-series","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}