{"product_id":"square-d-qo3401021-40a-240v-3-pole-plug-in-circuit-breaker","title":"Square D QO3401021 - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QO3401021 — a 40A, 240V, 3-pole plug-in circuit breaker from the trusted Square D QO family. Engineered for dependable branch circuit protection in panelboards and load centers, this molded-case breaker delivers reliable overcurrent and short-circuit protection for demanding 240V circuits. Sold by AmpState, it’s a smart choice for professionals and serious DIYers alike.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless field replacement, minimizing downtime in service or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a range of operating conditions, reducing nuisance trips and ensuring consistent performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM panel compatibility\u003c\/strong\u003e is designed to fit matching Square D load centers and panelboards, helping ensure proper fit, electrical integrity, and reliable operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple environments\u003c\/strong\u003e suitable for residential, commercial, and light industrial applications where robust 240V protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations or panel upgrades in homes, offices, or small businesses that rely on three-pole protection for 240V circuits.\u003c\/li\u003e \u003cli\u003eReplacing aging or worn plug-in breakers within compatible Square D panels to restore dependable protection without rewiring.\u003c\/li\u003e \u003cli\u003eMotor loads, HVAC equipment, or other 240V appliances in light industrial settings that demand reliable, repeatable trip performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\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 QO3401021\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 \u003cp\u003eWith its plug-in design, reliable thermal-magnetic protection, and seamless compatibility with Square D panel centers, the QO3401021 is a practical, long-lasting solution for safeguarding critical circuits. Add it to your setup to ensure quick protection, easy maintenance, and dependable performance in both new and retrofit projects.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355405045922,"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-qo3401021-40-a-240-v-3-pole-plug-in-circuit-breaker-185.webp?v=1788755023","url":"https:\/\/www.ampstate.com\/products\/square-d-qo3401021-40a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}