{"product_id":"square-d-fi36040-40a-600v-3-pole-plug-in-circuit-breaker","title":"Square D FI36040 - 40 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FI36040 40 A, 600 V, 3-Pole Plug-In Circuit Breaker—designed to protect every branch circuit in panelboards and load centers with precision and ease. Available from AmpState, this breaker delivers quick service and reliable protection for residential, commercial, and light-industrial applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection:\u003c\/strong\u003e snaps into compatible Square D load centers for rapid installation and straightforward replacement when service is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e provides stable, repeatable protection by responding to both overload and short-circuit conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for 3-phase systems:\u003c\/strong\u003e ideal for distributed power in commercial or light-industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible:\u003c\/strong\u003e engineered to fit matching Square D panelboards and load centers for seamless integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile across settings:\u003c\/strong\u003e suitable for residential, commercial, and light-industrial electrical protection needs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart number: FI36040\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 40 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of poles: 3\u003c\/li\u003e \u003cli\u003eMounting style: Plug-in\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eUse cases and scenarios\u003c\/h2\u003e\n\u003cp\u003eThe FI36040 is designed to protect branch circuits across a range of environments:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eResidential panels where 3-phase distribution is present or for future upgrades with 3-pole protection.\u003c\/li\u003e \u003cli\u003eCommercial service equipment and distribution boards that require dependable 40 A protection at up to 600 V.\u003c\/li\u003e \u003cli\u003eLight-industrial machinery feeds where quick plug-and-play replacement reduces downtime during maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation, compatibility, and safety tips\u003c\/h2\u003e\n\u003cp\u003ePlug-in compatibility with Square D OEM load centers and panelboards means you can swap in a like-for-like breaker during upgrades or service calls without rewiring the enclosure. For best results:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eTurn off main power and verify the panel rating before installation.\u003c\/li\u003e \u003cli\u003eUse the correct 3-pole, 40 A configuration to support your three-phase circuits up to 600 V.\u003c\/li\u003e \u003cli\u003eEnsure the panelboard is listed for molded-case breakers of this type and that the bus connectors align for a secure, audible snap.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose this Square D FI36040 at AmpState?\u003c\/h2\u003e\n\u003cp\u003eWith a proven track record of reliable performance, Square D molded case breakers deliver consistent trip characteristics and durable construction. The FI36040’s fast plug-in design minimizes downtime during replacements, while the thermal-magnetic trip delivers predictable behavior across temperature and load conditions. When you need 3-pole protection that fits neatly into compatible panelboards and load centers, this 40 A, 600 V unit is a compelling choice for installers and facility managers who value speed, reliability, and ease of maintenance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355238256802,"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-fi36040-40-a-600-v-3-pole-plug-in-circuit-breaker-ampstate-442.webp?v=1788745034","url":"https:\/\/www.ampstate.com\/products\/square-d-fi36040-40a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}