{"product_id":"square-d-pja36120u43a-1200a-3-pole-plug-in-circuit-breaker","title":"Square D PJA36120U43 A - 1200 A, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D PJA36120U43A — a 1200A, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Its fast plug-in connection enables quick installation and seamless replacements, reducing downtime on service calls and retrofit projects. The built-in thermal-magnetic trip unit provides stable, repeatable protection across varying temperatures and electrical loads, helping to secure critical equipment and systems.\u003c\/p\u003e \u003ch3\u003eKey advantages that matter in the field\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e — minimizes installation time and simplifies panel upgrades or replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e — combines overload protection with immediate short-circuit response for reliable, consistent protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e — specifically designed to be compatible with matching Square D load centers and panelboards for a seamless fit and wiring harmony.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e — suitable for residential, commercial, and light industrial deployments where heavy-duty 3-phase protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\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 PJA36120U43A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker (MCCB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 1200A\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\u003eIdeal use cases and who benefits most\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eLarge commercial buildings and light industrial facilities with three-phase power demands, where a single 1200A protection device can cover substantial feeder loads.\u003c\/li\u003e \u003cli\u003ePanelboard upgrades or retrofits that require a robust, OEM-compatible plug-in breaker to minimize downtime and ensure reliable fault isolation.\u003c\/li\u003e \u003cli\u003eNew installations in environments that rely on rapid, repeatable protective performance for critical circuits.\u003c\/li\u003e \u003cli\u003eMaintenance scenarios where quick replacement of a failed breaker is essential to keep systems online with minimal disruption.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out from alternatives\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRather than a generic replacement, the Square D PJA36120U43A is engineered to integrate with Square D OEM load centers and panelboards, preserving electrical coordination and minimizing mismatches in trip characteristics.\u003c\/li\u003e \u003cli\u003eThe plug-in design reduces wiring complexity and installation time compared with bolt-in or hard-wired options, making field work faster and safer.\u003c\/li\u003e \u003cli\u003eWith a high 1200A rating and three poles, it’s built to protect substantial three-phase circuits against both overloads and short circuits, helping safeguard equipment and maintain system stability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re outfitting a new panel, scaling a facility’s electrical backbone, or replacing a worn-out unit in an OEM load center, the Square D PJA36120U43A delivers precise protection, straightforward installation, and compatibility you can trust. If you’re matching gear from Square D’s family of panelboards and load centers, this plug-in MCCB from AmpState is designed to fit your needs with clear, reliable performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355357630626,"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_de986538-6a56-4541-8651-6aa5a0870cee.png?v=1764691516","url":"https:\/\/www.ampstate.com\/products\/square-d-pja36120u43a-1200a-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}