{"product_id":"siemens-jfc3m300","title":"Siemens JFC3M300 300A 3-Pole 415 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens JFC3M300 — a rugged, high-capacity 300 A, 3-pole circuit breaker designed for serious industrial power distribution. With a 415 V rating, this breaker is built to safely interrupt fault currents in three-phase systems, protecting both equipment and personnel in demanding environments.\u003c\/p\u003e \u003ch2\u003eWhy the Siemens JFC3M300 stands out\u003c\/h2\u003e\n\u003cp\u003eDesigned for reliability in manufacturing floors, data centers, large HVAC installations, and other heavy-load environments, the JFC3M300 delivers synchronized protection across all three phases. Its robust construction and Siemens engineering ensure consistent performance where downtime isn’t an option, helping you avert costly interruptions and equipment damage.\u003c\/p\u003e \u003ch3\u003eCore specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 300 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3 (suited for 3-phase circuits)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 415 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e JFC3M300\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cp\u003e- Upgrading a main distribution panel in facilities with heavy motor loads and drive systems. \u003c\/p\u003e\n\u003cp\u003e- Replacing aging protection devices in 3-phase installations that operate at 415 V. \u003c\/p\u003e\n\u003cp\u003e- Protecting critical distribution boards in environments where rapid, dependable interruption is essential to prevent cascading equipment failures.\u003c\/p\u003e \u003ch3\u003eWhat problems it solves\u003c\/h3\u003e\n\u003cp\u003eBy delivering dependable overload protection and prompt short-circuit interruption for three-phase circuits, the JFC3M300 helps minimize equipment damage and electrical fire risk while reducing unplanned downtime. The three-pole design ensures each phase is simultaneously isolated, preserving system stability and safety during faults.\u003c\/p\u003e \u003ch3\u003ePractical tips for selection and installation\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm panel compatibility with Siemens JFC-series breakers and ensure the busbar arrangement supports a 3-pole device.\u003c\/li\u003e \u003cli\u003eVerify that a 300 A rating aligns with the protected circuit’s continuous load and worst-case fault currents typical for your installation.\u003c\/li\u003e \u003cli\u003ePlan for regular inspections of terminations and connections to maintain reliable performance and safe operation.\u003c\/li\u003e \u003cli\u003eWhen replacing an older unit, match the exact part number (JFC3M300) to preserve intended interrupting capacity and protection characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423251386530,"sku":"JFC3M300","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/siemens-jfc3m300","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}