{"product_id":"eaton-qc3040h-40a-9v-3-pole-circuit-breaker","title":"Eaton QC3040H - 40 A, 9 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton QC3040H delivers dependable branch circuit protection in a compact molded case design, tailored for panelboards and load centers. At 40A and 3 poles with a 9V rating, this breaker is built to handle overcurrent and short-circuit events with precision and repeatable performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e maximizes panel space, making it easier to fit multiple circuits in tight electrical enclosures without compromising protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection by responding to both overloads and short circuits, reducing nuisance trips and extending circuit reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e supports multi-wire and 3‑phase distribution needs, delivering coordinated protection across three conductors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-friendly compatibility\u003c\/strong\u003e designed to pair with matching OEM load centers and panelboards for straightforward replacement and installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suitable for residential panels, commercial distribution, and light industrial panels, where compact, reliable protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned for real-world scenarios, the QC3040H shines in situations where space is at a premium and dependable protection matters. Use it to safeguard branch circuits in a home subpanel, a small to mid-sized commercial panel, or a light industrial distribution panel, all while maintaining clean wiring and reliable interruption protection when circuits fault or short.\u003c\/p\u003e \u003ch3\u003eTechnical at a glance\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 QC3040H\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 9V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection in panelboards and load centers\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWho benefits most\u003c\/strong\u003e electrical professionals, panel builders, and facility managers who need a reliable, space-efficient 3-pole breaker that aligns with OEM panel systems. The QC3040H minimizes replacement headaches by ensuring compatibility with matching Eaton panelboards and loadcenters, reducing retrofit time and field adjustments.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical installation tips\u003c\/strong\u003e — verify the panel’s compatibility with the QC3040H’s 3-pole, 40A, 9V specification; ensure secure mounting and proper conductor termination; plan circuit layouts to optimize panel space use, taking advantage of the breaker’s compact design for tidy, organized enclosures. For ongoing reliability, inspect connections during routine panel maintenance and replace any worn components only with Eaton-specified parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349665501346,"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_00b05334-37ef-4194-9be2-f375138c451a.png?v=1764153167","url":"https:\/\/www.ampstate.com\/products\/eaton-qc3040h-40a-9v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}