{"product_id":"siemens-jxd63b400l-350a-600v-3-pole-circuit-breaker","title":"Siemens JXD63B400L - 350 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens JXD63B400L is a high-capacity, 3-pole molded case circuit breaker designed to protect large feeders and critical circuits in panelboards and load centers. At 350A and 600V, it delivers reliable overcurrent and short-circuit protection for demanding commercial, industrial, and large residential applications, while helping you maximize space in the electrical panel.\u003c\/p\u003e \u003cp\u003eKey advantages that set this breaker apart:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e optimizes panel space without compromising performance, making it easier to fit dense electric distribution layouts.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection for both overloads and short circuits, helping prevent nuisance trips and ensuring fast response to dangerous faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e supports 3-phase systems up to 600V, ideal for multi-phase machinery and commercial electrical distributions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e350A continuous rating\u003c\/strong\u003e protects large feeders and equipment, delivering robust protection for demanding circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e designed to pair with Siemens load centers and panelboards for seamless integration and coordinated protection across the distribution system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments where reliable, scalable protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e JXD63B400L\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 350A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\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\u003eIdeal use scenarios\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading panelboards in commercial office buildings to support higher feeder loads for HVAC, lighting, and power distribution.\u003c\/li\u003e \u003cli\u003eInstalling or retrofitting switchgear in light industrial facilities where reliable 3-phase protection is critical.\u003c\/li\u003e \u003cli\u003eServing large residential complexes with centralized feeders that require robust, space-efficient protection inside panel enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose the JXD63B400L over other breakers?\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIts combination of a compact form factor and a thermal-magnetic trip mechanism delivers precise, predictable protection without consuming excessive panel space.\u003c\/li\u003e \u003cli\u003e3-pole design aligns with 3-phase systems, enabling straightforward integration into existing Siemens OEM load centers and panelboards for coherent protection coordination.\u003c\/li\u003e \u003cli\u003eThe 350A rating is tailored for heavy feeders and essential circuits, offering strong protection while maintaining reliable operation under normal load conditions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips for installation and operation\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eEnsure the panelboard or load center is compatible with Siemens JXD63 series breakers to maintain proper coordination and performance.\u003c\/li\u003e \u003cli\u003eFollow standard electrical codes and torque specifications for lug connections to ensure a secure, low-impedance termination.\u003c\/li\u003e \u003cli\u003eCoordinate upstream protection to prevent simultaneous trips and optimize selectivity for complex feeder layouts.\u003c\/li\u003e \u003cli\u003eEngage a qualified electrician for installation, testing, and commissioning to verify correct operation within your distribution system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Siemens JXD63B400L, you gain a dependable, space-efficient, 3-pole solution that delivers clear, repeatable protection for essential circuits in panelboards and load centers. It’s the practical choice for larger feeders in commercial, industrial, and high-demand residential settings where reliability and integration with Siemens’ ecosystem matter most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349818396834,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-jxd63b400l-350-a-600-v-3-pole-circuit-breaker-ampstate-417.webp?v=1788733122","url":"https:\/\/www.ampstate.com\/products\/siemens-jxd63b400l-350a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}