{"product_id":"square-d-mja36450-450a-600v-3-pole-plug-in-circuit-breaker","title":"Square D MJA36450 - 450 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D MJA36450 brings rugged, reliable protection to panelboards and load centers with a 450A, 600V, 3-pole plug-in molded case circuit breaker. Built for fast service and durable performance, this unit is a smart choice when you need dependable overcurrent and short-circuit protection in demanding electrical environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cstrong amperage:\u003e 450A\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003evoltage rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003epoles:\u003c\/strong\u003e 3-pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003emounting style:\u003c\/strong\u003e plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003etrip mechanism:\u003c\/strong\u003e thermal-magnetic trip unit for stable, repeatable protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003etype:\u003c\/strong\u003e molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003epart number:\u003c\/strong\u003e MJA36450\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003emanufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this 3-pole plug-in breaker stands out:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003efast plug-in connection\u003c\/strong\u003e enables quick installation and simple replacement, minimizing downtime during maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ethermal-magnetic protection\u003c\/strong\u003e delivers precise overload and short-circuit response, helping protect wiring, downstream equipment, and personnel.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is engineered to pair with matching Square D load centers and panelboards for seamless electrical coordination.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eversatile for multiple markets\u003c\/strong\u003e suitable for residential, commercial, and light industrial applications where reliable, high-current protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eHeavy-load feeders in commercial panelboards that demand robust 450A protection at up to 600V.\u003c\/li\u003e \u003cli\u003eUpgrades to existing electrical infrastructures where fast swap-in of plug-in breakers reduces downtime.\u003c\/li\u003e \u003cli\u003eResidential service panels or light industrial distribution boards that require durable, high-capacity circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eEnsure your installation uses a compatible Square D load center or panelboard to maintain electrical coordination and proper trip characteristics.\u003c\/li\u003e \u003cli\u003eKeep spares on hand for rapid replacement in critical circuits—the plug-in design simplifies onboarding during routine maintenance or after a fault trip.\u003c\/li\u003e \u003cli\u003eDocument the part number (MJA36450) and amperage\/voltage rating in your asset management records to streamline future replacements and audits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor high-demand environments where reliability and speed matter, the Square D MJA36450 450A, 600V, 3-Pole Plug-In Molded Case Circuit Breaker from AmpState delivers dependable branch-circuit protection with a design built to endure. This OEM-compatible unit is ready to integrate into compatible panelboards and load centers, helping you maintain safe, uninterrupted electrical service across residential, commercial, and light industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355348390050,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-mja36450-450-a-600-v-3-pole-plug-in-circuit-breaker-655.webp?v=1788751575","url":"https:\/\/www.ampstate.com\/products\/square-d-mja36450-450a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}