{"product_id":"siemens-qf240acsa-40a-240v-2-pole-plug-in-circuit-breaker","title":"Siemens QF240ACSA - 40 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens QF240ACSA is a robust 40A, 240V, 2-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for fast, tool-free installation, this unit snaps into compatible Siemens panels with a secure plug-in connection, making replacements and upgrades quicker and cleaner than bolt-on alternatives.\u003c\/p\u003e \u003ch3\u003eWhy the QF240ACSA stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-in simplicity\u003c\/strong\u003e—a fast, secure connection that reduces installation time and minimizes service downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e—delivers stable, repeatable protection against overcurrent and short circuits, helping to prevent nuisance trips and protect sensitive equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e OEM compatibility\u003c\/strong\u003e—engineered to match Siemens load centers and panelboards for seamless fit and long-term reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e—suitable for residential, commercial, and light industrial environments where dependable 2-pole protection at 240V is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eUse the QF240ACSA to shield large 240V circuits and essential branch circuits in a variety of settings. It’s an excellent choice when upgrading or replacing existing breakers in Siemens panelboards, equipping new or relocated subpanels, or reinforcing protection in retrofit projects for homes, offices, retail spaces, or small manufacturing environments where quick service and reliable protection are priorities.\u003c\/p\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QF240ACSA\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 2\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 \u003ch3\u003ePractical guidance for best results\u003c\/h3\u003e\n\u003cp\u003eFor optimal performance, pair the QF240ACSA with matching OEM Siemens panelboards and load centers to ensure proper fit, protection coordination, and predictable trip behavior. When performing upgrades or replacements, verify that the circuit load and conductor sizing align with local electrical codes and the breaker's 40A rating. Regularly inspect connections for signs of wear or arcing, and replace the unit if you notice any damage to the housing or trip mechanism.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355159515298,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-qf240acsa-40-a-240-v-2-pole-plug-in-circuit-breaker-433.webp?v=1788736581","url":"https:\/\/www.ampstate.com\/products\/siemens-qf240acsa-40a-240v-2-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}