{"product_id":"square-d-qob340gfi-40a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB340GFI - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB340GFI from AmpState — a 40A, 240V, 3-pole bolt-on molded‑case circuit breaker designed to protect your panelboards and load centers with dependable, consistent performance. Built for real-world installations, this unit pairs robust construction with precise protection to keep your electrical system running smoothly.\u003c\/p\u003e \u003ch3\u003eWhy technicians choose this breaker\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e delivers a rigid, vibration‑resistant bus connection that stays tight through busy panels and routine service.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e provides stable, repeatable protection by combining a thermal element for overloads with a magnetic element for fast short-circuit response.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility:\u003c\/strong\u003e designed to integrate seamlessly with matching Square D panels, ensuring predictable fit and coordinated protection in your loadcenter.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments where reliable 240V, 3-pole protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart number: QOB340GFI\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: 240 V\u003c\/li\u003e \u003cli\u003eNumber of poles: 3\u003c\/li\u003e \u003cli\u003eMounting style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplications: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases and installation tips\u003c\/h3\u003e\n\u003cp\u003eIdeal for 3-pole 240V circuits in panelboards and load centers, including commercial panels, subpanels, and certain industrial applications. When upgrading an existing installation or expanding a distribution group, pair this breaker with the appropriate OEM Square D panels to ensure proper fit and protection coordination. For installation, follow the manufacturer’s torque guidelines to maintain a solid bus connection and reliable trip performance.\u003c\/p\u003e \u003ch3\u003eWhat problems this solves\u003c\/h3\u003e\n\u003cp\u003eWith a secure bolt-on design and a well-behaved thermal-magnetic trip, the QOB340GFI minimizes nuisance trips and sustains protection under varying loads and conditions. Its rigid mounting helps resist connection loosening in vibration-prone environments, delivering dependable branch circuit protection where it matters most.\u003c\/p\u003e \u003ch3\u003eWho this is ideal for\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHomeowners or electricians upgrading residential panelboards that require 240V, 3-pole protection\u003c\/li\u003e \u003cli\u003eCommercial electrical rooms needing reliable distribution for 3-pole circuits\u003c\/li\u003e \u003cli\u003eLight industrial settings where OEM compatibility and sturdy bolt-on mounting are priorities\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUpgrade your panel with the Square D QOB340GFI 40 A, 240 V, 3-pole bolt-on breaker from AmpState and enjoy durable protection designed for real-world use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355420283042,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_7236977a-f240-4514-81dc-2479e8a8caec.png?v=1764691991","url":"https:\/\/www.ampstate.com\/products\/square-d-qob340gfi-40a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}