{"product_id":"siemens-jd2b400-circuit-breaker","title":"Siemens | JD2B400 | Circuit Breaker | 400A | 2-Pole | 240V | 65kA","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens JD2B400 circuit breaker — a rugged 400A, 2-pole device engineered for demanding commercial and industrial electrical systems. Designed for 240V circuits with a robust 65 kA short-circuit current rating, it delivers reliable protection where you need it most. When you're performing maintenance, retrofit, or replacement, this unit matches exact specifications to keep your panel configuration protected and compliant.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInterrupting rating:\u003c\/strong\u003e 65kA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e JD2B400 — best reference for compatibility\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the Siemens JD2B400?\u003c\/strong\u003e This breaker provides a precise trip characteristic suitable for coordinating with other protection devices in a main distribution panel or motor control setup. The 2-pole design ensures both live conductors are simultaneously de-energized, enhancing safety and easing downstream coordination during faults or maintenance.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e — use this JD2B400 where you need a confirmed 400A protection point in 240V circuits: replacement in aging panels, retrofit projects that require upgrading to higher protection levels, or maintenance scenarios where exact part matching is essential to avoid compatibility issues.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eCompatibility and installation tips\u003c\/strong\u003e — always confirm fit and ratings before ordering. Use the \u003cem\u003eJD2B400\u003c\/em\u003e part number as the primary reference to ensure compatibility with your panel or switchgear. Handle with standard electrical safety practices, verify conductor sizing, and ensure the enclosure rating and bus configuration align with this unit's specifications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46424430411938,"sku":"JD2B400","price":310.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/siemens-jd2b400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}