{"product_id":"siemens-jd63m400-circuit-breaker","title":"Siemens | JD63M400 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens JD63M400 Circuit Breaker delivers robust, three-pole protection for demanding electrical systems. With a 400A rating and a 600V operating capability, this bolt-on unit is purpose-built for maintenance, retrofit, and replacement projects where precise spec matching matters.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAmperage: 400 A\u003c\/li\u003e \u003cli\u003ePoles: 3-Pole\u003c\/li\u003e \u003cli\u003eVoltage: 600 V\u003c\/li\u003e \u003cli\u003eMounting: Bolt-On\u003c\/li\u003e \u003cli\u003ePart Number: JD63M400\u003c\/li\u003e \u003cli\u003eApplications: Maintenance, retrofit, and replacement in compatible Siemens panels\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens JD63M400 is the right choice\u003c\/h3\u003e\n\u003cp\u003eThis 3-pole, 600V bolt-on circuit breaker is designed to integrate smoothly with Siemens protection systems, providing reliable interruption protection for high-current feeders. The bolt-on design offers a secure mechanical fit and straightforward installation, making it a practical choice for service crews working on retrofit and replacement tasks.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRetrofit projects upgrading panel protection to 400A capacity\u003c\/li\u003e \u003cli\u003eMaintenance scenarios where a precise JD63M400 replacement is required\u003c\/li\u003e \u003cli\u003eReplacement in large commercial or industrial distribution panels that demand 3-pole, 400A protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Confirm fit and ratings before ordering. The JD63M400 part number serves as the best reference to ensure compatibility with your Siemens equipment and panel configuration.\u003c\/p\u003e \u003ch3\u003ePractical tips for optimal results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eVerify the panel’s voltage rating (600V) and bus configuration to ensure a proper match with a 3-pole bolt-on unit.\u003c\/li\u003e \u003cli\u003eKeep a spare JD63M400 on hand for proactive maintenance and faster replacements.\u003c\/li\u003e \u003cli\u003eDuring installation, follow manufacturer torque specifications for mounting bolts to ensure secure operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eEquip your service toolkit with the Siemens JD63M400 to protect high-current circuits with confidence. Ready for retrofit, maintenance, or replacement—this 400A, 3-pole, 600V bolt-on breaker is built to keep critical systems safely online.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427066564770,"sku":"JD63M400","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a0994f42-7fad-49d1-911a-c2784022b8c9.png?v=1765492979","url":"https:\/\/www.ampstate.com\/products\/siemens-jd63m400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}