{"product_id":"eaton-qcr1040-40a-120v-1-pole-circuit-breaker","title":"Eaton QCR1040 - 40 A, 120 V, 1-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton QCR1040, a compact 40A, 120V, 1-pole molded-case circuit breaker designed to safeguard branch circuits in panelboards and load centers. Built for reliable, repeatable protection, this breaker fits tight panel layouts without compromising safety or performance.\u003c\/p\u003e \u003ch3\u003eWhy the QCR1040 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient design\u003c\/strong\u003e: Molded-case construction minimizes footprint, helping you maximize panel capacity in residential, commercial, and light industrial installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection\u003c\/strong\u003e: A combined thermal and magnetic trip unit delivers stable, predictable response to overloads and short circuits across varying temperatures, reducing nuisance trips and protecting both wiring and connected devices.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e: Specifically engineered to pair with matching Eaton OEM load centers and panelboards, ensuring proper fit, labeling, and warranty alignment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile 1-pole, 40A, 120V configuration\u003c\/strong\u003e: Ideal for protecting single hot circuits in 120V systems that require up to 40A of protection, such as high-demand lighting, outlets, or dedicated equipment circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential panelboards where space is at a premium but reliable branch-circuit protection is essential.\u003c\/li\u003e \u003cli\u003eCommercial and light industrial panels serving lighting, receptacles, or small equipment loads at 120V.\u003c\/li\u003e \u003cli\u003eRetrofit or replacement scenarios where OEM compatibility and a like-for-like form factor simplify installation and maintain system integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it protects your system\u003c\/h3\u003e\n\u003cp\u003eThe QCR1040 provides both overload and short-circuit protection for dedicated 120V circuits. By interrupting fault current quickly and reliably, it helps prevent wiring damage and fire hazards, while maintaining steady electrical performance for sensitive loads.\u003c\/p\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QCR1040\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 1\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 \u003cp\u003eChoose the Eaton QCR1040 for dependable, panel-friendly protection that aligns with your existing load centers and panelboards. It’s a practical, purpose-built solution for keeping 120V circuits safe, compliant, and ready to perform when you need them most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349668548770,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton_breaker_and_panels_86d01bc4-c4f5-4a25-9676-ef92eec429da.png?v=1764153279","url":"https:\/\/www.ampstate.com\/products\/eaton-qcr1040-40a-120v-1-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}