{"product_id":"square-d-qo320swn1021","title":"Square D QO320SWN1021 20A 3-Pole 240 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QO320SWN1021 20A 3-Pole 240 V Circuit Breaker—a dependable protection device designed for 240-volt installations and three hot-leg circuits. As a genuine Square D component, this part number is a reliable replacement option for existing QO panelboards, delivering precise overcurrent protection for 20-amp loads.\u003c\/p\u003e \u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003ePart number QO320SWN1021, this 20-amp, 3-pole breaker safeguards three conductors in 240 V service. It’s ideal for three-phase equipment or multi-wire branch circuits where uninterrupted protection across all hot legs is essential.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eCurrent rating: 20 A\u003c\/li\u003e \u003cli\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eVoltage rating: 240 V\u003c\/li\u003e \u003cli\u003ePart number: QO320SWN1021\u003c\/li\u003e \u003cli\u003eBrand: Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this 3‑pole 240 V breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDedicated protection for 3-wire, 240 V circuits: The 3-pole design interrupts all hot legs simultaneously, reducing the risk of dangerous feed-through during a fault.\u003c\/li\u003e \u003cli\u003eGenuine Square D compatibility: Specifically engineered to fit Square D QO panelboards, ensuring reliable mating with the bus and lugs and straightforward replacement when servicing legacy equipment.\u003c\/li\u003e \u003cli\u003eEase of maintenance and upgrades: Using this like-for-like, 20 A protection device within existing QO infrastructure helps extend service life without rewiring.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eUse cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eProtects 240 V circuits feeding three-phase equipment or multi-wire branch circuits\u003c\/li\u003e \u003cli\u003eIdeal replacement part for Square D QO panelboards requiring a 20 A, 3-pole device\u003c\/li\u003e \u003cli\u003eSuitable for small motors, pumps, and general 240 V loads up to 20 A\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eEnsure the panel is designed for QO-series breakers and that a 20 A, 3-pole, 240 V device is required for the circuit.\u003c\/li\u003e \u003cli\u003eVerify wiring corresponds to a three-pole, 240 V configuration and follow local electrical codes during installation.\u003c\/li\u003e \u003cli\u003eIf replacing an existing unit, confirm the part number and rating to minimize downtime and ensure a proper match with your QO panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423098097826,"sku":"QO320SWN1021","price":712.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-qo320swn1021-20a-3-pole-240-v-circuit-breaker-766.webp?v=1789269413","url":"https:\/\/www.ampstate.com\/products\/square-d-qo320swn1021","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}