{"product_id":"siemens-jxd63l400-400a-480v-3-pole-bolt-on-circuit-breaker","title":"Siemens JXD63L400 - 400 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens JXD63L400 — a rugged, high-capacity bolt-on molded case circuit breaker designed to protect large branch circuits in panelboards and loadcenters. At 400A and 480V, this 3-pole unit delivers reliable, fast-acting protection for demanding commercial and light-industrial electrical environments, while integrating smoothly with OEM loadcenters for a seamless upgrade or replacement.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: Provides a rigid, vibration-resistant bus connection that stays tight under operating conditions, reducing the risk of connection loosening in busy electrical rooms.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: Combines instantaneous short-circuit protection with time-delayed overload protection for stable, repeatable performance across varying load profiles.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for 3-phase systems\u003c\/strong\u003e: Specifically suited for 3-phase circuits common in commercial and light-industrial applications, ensuring balanced protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e: Engineered to pair with matching Siemens OEM loadcenters and panelboards, simplifying replacements, retrofits, and panel upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: Ideal for residential, commercial, and light-industrial electrical installations where robust branch-circuit protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\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 JXD63L400\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 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\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\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replenishing large panelboards and loadcenters that serve 3-phase commercial equipment.\u003c\/li\u003e \u003cli\u003eProtecting heavy-load feeders in light-industrial rooms, equipment closets, and electrical rooms with vibration-prone environments.\u003c\/li\u003e \u003cli\u003eRetrofits and new installations where a secure bolt-on connection minimizes movement and ensures consistent electrical contact.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility guidance\u003c\/h3\u003e\n\u003cp\u003eThe JXD63L400 is designed to slot into Siemens-compatible panelboards and loadcenters that support bolt-on molded case breakers. When installing, ensure the panelboard or loadcenter is specified for bolt-on MCCBs of this size and verify that the 3-pole configuration aligns with your 3-phase electrical system. This unit’s bolt-on mounting provides a dependable bus connection that remains steady through thermal cycling and routine vibrations common in commercial spaces.\u003c\/p\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm that your panelboard or loadcenter is compatible with Siemens JXD63L400 bolt-on breakers to ensure electrical and mechanical compatibility.\u003c\/li\u003e \u003cli\u003eDuring installation, secure all mounting hardware to maintain the integrity of the bus connection and minimize resistance points.\u003c\/li\u003e \u003cli\u003eUse this breaker in applications where a robust, reliable thermal-magnetic protection is required for high-current 3-phase circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Siemens JXD63L400 delivers a focused, purpose-built solution for safeguarding substantial 3-phase circuits. With its secure mounting, dependable trip mechanism, and OEM-compatible design, it’s a practical, long-term choice for reliable electrical protection in panelboards and loadcenters.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349819674786,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-jxd63l400-400-a-480-v-3-pole-bolt-on-circuit-breaker-996.webp?v=1788733148","url":"https:\/\/www.ampstate.com\/products\/siemens-jxd63l400-400a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}