{"product_id":"siemens-mbkjd1-circuit-breaker","title":"Siemens | MBKJD1 | Circuit Breaker | 400A","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens MBKJD1 is a 400A circuit breaker designed to protect heavy-load electrical systems with precision and reliability. Built for demanding environments, this unit shines in maintenance, retrofit, and replacement projects where exact specifications are non-negotiable.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A. Delivers robust main-line protection for commercial and industrial panels, keeping critical loads safeguarded from faults and surges.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MBKJD1. This is the definitive reference for compatibility—use it to verify fit within Siemens panels and related equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Ideal for maintenance, retrofit, and replacement when matching specs is essential to restore reliable protection and minimize downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose MBKJD1? It adheres to Siemens engineering standards, ensuring a dependable fit and predictable performance in your electrical distribution. With a 400A rating, it is well-suited for main protection in facilities that manage substantial electrical loads, from commercial complexes to industrial facilities, warehouses, and large service panels.\u003c\/p\u003e \u003cp\u003eWho is this for? Electrical contractors, facilities teams, and maintenance technicians who need a precise, high-capacity circuit breaker that matches Siemens specifications and integrates seamlessly with existing gear.\u003c\/p\u003e \u003cp\u003eUse cases and practical benefits:\n- Replacing a failed or degraded 400A main breaker in Siemens panel enclosures to restore secure, code-compliant protection.\n- Retrofit or upgrade projects where the load profile requires a 400A protective device without changing the entire panel layout.\n- Service replacements during routine maintenance to ensure continued reliability and compatibility with existing breakers and bus configurations.\u003c\/p\u003e \u003cp\u003eImportant note: Confirm fit and ratings before ordering. The MBKJD1 part number is the most reliable reference for compatibility with your Siemens system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426820051106,"sku":"MBKJD1","price":7935.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-mbkjd1-circuit-breaker-400a-609.webp?v=1789628199","url":"https:\/\/www.ampstate.com\/products\/siemens-mbkjd1-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}