{"product_id":"square-d-mja36500-500a-600v-3-pole-plug-in-circuit-breaker","title":"Square D MJA36500 - 500 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D MJA36500\u003c\/strong\u003e is a high-capacity, plug-in molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. With a robust 500A rating, 600V capacity, and a 3-pole configuration, it’s engineered to handle demanding electrical environments with ease.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection:\u003c\/strong\u003e Quick installation and easy replacement, minimizing downtime during panel maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e Delivers stable, repeatable protection against overloads and short circuits, helping to prevent nuisance tripping and ensuring consistent performance over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design:\u003c\/strong\u003e Ideal for three-phase systems found in commercial and light industrial applications, providing coordinated protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V rating:\u003c\/strong\u003e Suitable for higher-voltage distribution tasks within panelboards and load centers, supporting safer and more versatile electrical setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible:\u003c\/strong\u003e Designed to be compatible with matching Square D OEM load centers and panelboards for seamless integration and reliable operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e Suitable for residential, commercial, and light industrial environments where dependable overcurrent and short-circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MJA36500\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 500A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and ideal applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eCommercial electrical rooms and service panels needing robust, high-current protection for 3-phase distribution.\u003c\/li\u003e \u003cli\u003eLight industrial setups where rapid replacement and minimized downtime are priorities due to plug-in installation.\u003c\/li\u003e \u003cli\u003eResidential-to-light-commercial panel upgrades that require OEM-compatible components for reliable performance.\u003c\/li\u003e \u003cli\u003eSystems requiring consistent trip characteristics to maintain protection coordination across multiple circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eThe MJA36500 combines a dependable thermal-magnetic protection scheme with a plug-in design that reduces installation time and service intervals. Its compatibility with matching OEM panels ensures a smooth, trouble-free retrofit or expansion, while the three-pole construction supports balanced protection across all phases in three-phase systems. For facilities that value uptime and predictable protection, this Square D breaker provides a clear, practical advantage over generic alternatives.\u003c\/p\u003e \u003ch3\u003ePractical installation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm panelboard compatibility with the MJA series before installation to ensure optimal fit and electrical performance.\u003c\/li\u003e \u003cli\u003eUse the plug-in connection to minimize on-site wiring complexity during replacement or expansion projects.\u003c\/li\u003e \u003cli\u003eHandle with care during removal and replacement to preserve bus connections and prevent contamination of the interior of the panel.\u003c\/li\u003e \u003cli\u003eRegularly inspect for signs of wear or heat on the breaker and surrounding components as part of routine electrical maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355348422818,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_644fc287-9e27-4844-8987-cfccc484d22d.png?v=1764691460","url":"https:\/\/www.ampstate.com\/products\/square-d-mja36500-500a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}