{"product_id":"square-d-sdt240-circuit-breaker","title":"Square D | SDT240 | Circuit Breaker | 40A | 2-Pole | 240V | 10kA | Plug-In","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the \u003cstrong\u003eSquare D SDT240 40A 2-Pole 240V Plug-In Circuit Breaker\u003c\/strong\u003e, a precise, equipment-matching solution for panel maintenance, retrofit, and replacement projects. Engineered to fit panels that accept SDT-series plug-in breakers, this unit delivers reliable overcurrent protection for 240V circuits in both residential and light commercial settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInterrupting Rating:\u003c\/strong\u003e 10kA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Plug-In\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters in real-world use:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCreates a reliable safeguard for 240V circuits that power essential appliances and equipment, such as HVAC systems, water heaters, and other high-demand loads.\u003c\/li\u003e \u003cli\u003eThe 10kA interrupting rating means it’s designed to quickly clear high-short-circuit faults, helping minimize damage to wiring and connected devices.\u003c\/li\u003e \u003cli\u003ePlug-in design enables faster, less invasive replacement or retrofit—great for service calls or panel upgrades with minimal downtime.\u003c\/li\u003e \u003cli\u003eAuthentic Square D craftsmanship and SDT-series compatibility ensure a match-for-match fit in compatible panels, reducing the guesswork during installation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompatibility and ordering note: Confirm fit and ratings before purchasing. The part number \u003cstrong\u003eSDT240\u003c\/strong\u003e is the best reference to ensure the breaker will match your Square D panel’s specifications and bus design.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eIdeal for:\u003c\/strong\u003e electricians, facility managers, and homeowners with electrical experience performing panel maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUse cases:\u003c\/strong\u003e replacement of a failed 40A 2-pole 240V breaker, retrofit to add circuit protection for a 240V load, or maintenance of a panel that already accepts SDT plug-in breakers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePractical tip:\u003c\/strong\u003e Always verify that the panel labeling and the SDT series compatibility align with the SDT240 before proceeding with replacement to avoid mismatches.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Square D SDT240, you’re choosing a proven, purpose-built solution that pairs straightforward plug-in installation with robust protection for your 240V circuits. This is the dependable choice when you need to restore reliable, code-compliant circuit protection quickly and accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46424391155874,"sku":"SDT240","price":310.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-sdt240-circuit-breaker-40a-2-pole-240v-10ka-plug-358.webp?v=1789350529","url":"https:\/\/www.ampstate.com\/products\/square-d-sdt240-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}