{"product_id":"siemens-jd63b400h-circuit-breaker","title":"Siemens | JD63B400H | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens JD63B400H Circuit Breaker — a purpose-built, high-capacity protection solution for demanding electrical systems. With a 400A rating, 3 poles, and a 600V maximum, this bolt-on breaker delivers reliable, secure over-current protection in maintenance, retrofit, and replacement projects where exact specifications matter. When the part number matters for compatibility, the JD63B400H is the trusted reference you can rely on.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e JD63B400H\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose the Siemens JD63B400H\u003c\/h2\u003e\n\u003cp\u003eThis circuit breaker is designed for three-phase distribution in commercial and industrial panels, delivering dependable protection for feeders and main circuits. Its bolt-on design ensures a secure, rigid connection within compatible enclosures, reducing the risk of loose contacts and improving system reliability. The JD63B400H is particularly well-suited for retrofit projects where you need an exact spec match to minimize panel modifications and downtime.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePanel upgrades and retrofits where a precise 400A, 3-pole, 600V solution is required\u003c\/li\u003e \u003cli\u003eReplacement for matching Siemens gear in existing equipment to restore original protection characteristics\u003c\/li\u003e \u003cli\u003eMain service disconnects and heavy-load feeders in commercial and light-industrial settings\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and compatibility tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eVerify fit and ratings:\u003c\/strong\u003e Confirm that your panel accepts a bolt-on, 3-pole 400A breaker with a 600V rating before ordering.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference part number:\u003c\/strong\u003e Use JD63B400H as the primary compatibility reference to ensure seamless replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSecure mounting:\u003c\/strong\u003e Install with the proper mounting hardware in a compatible enclosure to maintain electrical integrity and clearance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWho this is for\u003c\/h2\u003e\n\u003cp\u003eElectrical professionals responsible for maintaining and upgrading commercial or industrial electrical systems will value the Siemens JD63B400H for its exact-spec compatibility, robust construction, and straightforward bolt-on installation. It’s an efficient choice for technicians performing panel retrofits, service upgrades, or replacements where downtime and fitment precision matter.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427067056290,"sku":"JD63B400H","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-jd63b400h-circuit-breaker-400a-3-pole-600v-bolt-116.webp?v=1789666740","url":"https:\/\/www.ampstate.com\/products\/siemens-jd63b400h-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}