{"product_id":"square-d-qo3401021-40a-3p-circuit-breaker","title":"Square D QO3401021 40A 3P Circuit Breaker, QO, Plug-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QO3401021—a dependable 40A, 3-pole circuit breaker built for robust protection in panelboards, load centers, and electrical distribution networks. With the proven QO Plug-On design, this unit is designed for straightforward installation and reliable performance in demanding environments.\u003c\/p\u003e \u003ch3\u003eKey benefits that matter in the field\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003ePrecise protection for 3‑phase circuits:\u003c\/b\u003e 40 A, 3 poles to safeguard critical loads in commercial and industrial panel layouts.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eQO Plug-On reliability:\u003c\/b\u003e Quick, secure connection to the bus system for efficient installation and maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBOM-conscious replacement:\u003c\/b\u003e Ideal for replacement projects and stocking spares that keep your bill of materials aligned with the original part number.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBrand-backed performance:\u003c\/b\u003e Trusted Square D engineering designed to integrate seamlessly with existing QO families and electrical distribution gear.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eAvaliable through AmpState:\u003c\/b\u003e Ready to ship from AmpState to meet your project timelines.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhere and how you’ll use it\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePanelboards and load centers in commercial buildings, warehouses, and light industrial facilities.\u003c\/li\u003e \u003cli\u003eElectrical distribution setups where a 3-pole 40A protection device is required for balanced, three‑phase circuits.\u003c\/li\u003e \u003cli\u003eReplacement scenarios where you need to match an original part number to avoid BOM discrepancies.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eManufacturer:\u003c\/b\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePart number:\u003c\/b\u003e QO3401021\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eProduct type:\u003c\/b\u003e Circuit Breaker\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eAmperage:\u003c\/b\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePoles:\u003c\/b\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eConfiguration:\u003c\/b\u003e QO Plug-On\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow we help you confirm fit\u003c\/h3\u003e\n\u003cp\u003eNot sure if this is the exact match for your panel or BOM? We can help. Message us to verify compatibility and ensure your replacement part will drop in without issue, keeping your electrical system compliant and running smoothly.\u003c\/p\u003e \u003cp\u003eChoose the Square D QO3401021 for dependable protection, streamlined installation, and BOM compatibility—backed by AmpState’s availability to keep your project on schedule.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410844799138,"sku":"QO3401021","price":1182.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/square-d-qo3401021-40a-3p-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}