{"product_id":"square-d-qo340gfi-40a-240v-3-pole-plug-in-circuit-breaker","title":"Square D QO340GFI - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QO340GFI — a 40A, 240V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and load centers. This unit is built to handle everyday demand in residential, commercial, and light industrial environments, combining quick installation with reliable performance.\u003c\/p\u003e \u003ch3\u003eWhy this model stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection:\u003c\/strong\u003e Snap-in installation reduces downtime during replacement or upgrades, so you stay up and running with minimal interruption.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e Delivers stable, repeatable protection across a range of loads and conditions, helping prevent nuisance trips and protecting connected equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole at 240V:\u003c\/strong\u003e Ideal for 3-phase systems and multi-wire branch circuits in compatible panelboards, consolidating protection in a single, compact device.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded-case durability:\u003c\/strong\u003e Robust construction designed to withstand the rigors of commercial and light industrial use while preserving long service life.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM panel compatibility:\u003c\/strong\u003e Engineered to fit and coordinate with matching Square D load centers and panelboards for dependable electrical alignment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed breaker in existing Square D panelboards to restore circuit protection quickly.\u003c\/li\u003e \u003cli\u003eProtecting critical 3-pole 240V circuits in small commercial spaces or light industrial setups where reliable protection is essential.\u003c\/li\u003e \u003cli\u003eRetrofit or new installations where a plug-in solution minimizes panel downtime and simplifies future maintenance.\u003c\/li\u003e \u003cli\u003eSteady protection for branch circuits serving motors, HVAC equipment, or other 240V loads requiring robust, predictable trip behavior.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\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 QO340GFI\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 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240 V\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\u003eWho is it for and what problems does it solve?\u003c\/h3\u003e\n\u003cp\u003eDesigned for electricians, facilities managers, and property owners who need fast, reliable protection for 3-pole 240V circuits, the QO340GFI keeps critical systems safeguarded with minimal installation downtime. Its plug-in design and OEM compatibility reduce commissioning effort and ensure consistent protection across Square D panel ecosystems. If you’re upgrading a panel or replacing a failing breaker, this unit provides a precise fit, predictable trip behavior, and long-term reliability you can trust.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Always ensure compatibility with your specific panelboard model and follow local electrical codes. Installation should be performed by a licensed electrician.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355405144226,"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-qo340gfi-40-a-240-v-3-pole-plug-in-circuit-breaker-420.webp?v=1788755040","url":"https:\/\/www.ampstate.com\/products\/square-d-qo340gfi-40a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}