{"product_id":"siemens-jxd63b400h-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens JXD63B400H - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens JXD63B400H is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built to stand up to demanding electrical environments, it delivers reliable protection where it’s needed most—in both new installations and service upgrades.\u003c\/p\u003e \u003cp\u003eWhy this breaker stands out\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e creates a rigid, vibration-resistant bus connection that stays tight through thermal cycling and panel activity, helping maintain consistent electrical performance over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides fast magnetic response to short circuits with thermal protection for overloads, delivering stable, repeatable protection curves across a wide range of loads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design\u003c\/strong\u003e well suited for 3-phase panelboards and multi‑wire circuits common in commercial and light-industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400 A, 600 V rating\u003c\/strong\u003e supports high-current feeders and heavy-duty branch circuits in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e designed to integrate smoothly with matching Siemens panelboards and loadcenters for reliable performance and straightforward replacement or retrofits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e ideal for residential, commercial, and light-industrial installations where robust protection and service continuity are critical.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical use cases to consider\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIn a large residential service upgrade, use as a main feeder or a major branch-circuit protector to safely manage high-current loads such as electric heating or large HVAC equipment.\u003c\/li\u003e \u003cli\u003eIn a commercial panelboard, deploy as a main disconnect or critical feeder for motors, pumps, and compressor systems that require dependable short-circuit protection.\u003c\/li\u003e \u003cli\u003eDuring panel retrofit projects, replace aging or failing breakers with this 3-pole 400 A unit to restore reliable protection and improve mechanical stability in vibration-prone environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eProduct highlights at a glance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrong amperage rating:\u003e 400 A\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003evoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003epoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003emounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003etype:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eapplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Siemens JXD63B400H, you’re selecting a robust, purpose-built solution designed to deliver dependable protection, straightforward installation, and long-term reliability in panelboards and loadcenters. It’s the practical choice for electricians and facilities professionals who demand precise protection without compromise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349817512098,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_14a31e4a-649b-4a51-aeed-eaa575fadeee.png?v=1764157687","url":"https:\/\/www.ampstate.com\/products\/siemens-jxd63b400h-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}