{"product_id":"siemens-fxd63a150l-150a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens FXD63A150L - 150 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eSiemens FXD63A150L is a rugged, fault-tolerant choice for dependable branch circuit protection in panelboards and load centers. With a 150 A rating, 600 V capacity, and a 3-pole configuration, this bolt-on molded case circuit breaker is engineered for serious three-phase distribution in residential, commercial, and light industrial applications. \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. This reduces connection loosening and nuisance trips in environments with equipment vibration or door slams and maintenance activity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection. The thermal element responds to sustained overloads, while the magnetic element delivers a fast, decisive response to short circuits—helping protect wiring and downstream devices.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e works seamlessly with matching Siemens OEM load centers and panelboards, ensuring straightforward installation and reliable coordination with existing gear.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design for three-phase protection\u003c\/strong\u003e ideal for distributing balanced power to motors, compressors, pumps, and other three-phase equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600 V rating\u003c\/strong\u003e suits commercial and light-industrial circuits, providing a robust safety margin for higher voltage distribution while maintaining precise protection.\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 FXD63A150L\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 150 A\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\u003eApplications:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations in panelboards or load centers that require secure, vibration-resistant connections for reliable long-term performance.\u003c\/li\u003e \u003cli\u003eUpgrading three-phase feeders in commercial spaces or light-industrial equipment racks where stable protection and easy serviceability matter.\u003c\/li\u003e \u003cli\u003eRetrofits or replacements in Siemens-compatible ecosystems, where matching trip characteristics and physical fit reduce installation time.\u003c\/li\u003e \u003cli\u003eSystems with frequent cycling or motor loads, where a thermal-magnetic trip unit helps coordinate protection across multiple devices and reduces nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits most\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical professionals designing or upgrading three-phase distribution in offices, retail spaces, or light-industrial facilities.\u003c\/li\u003e \u003cli\u003eFacilities managers seeking durable, code-compliant protection that stands up to vibration and routine maintenance.\u003c\/li\u003e \u003cli\u003ePanelboard or load center installers who value straightforward integration with Siemens OEM components for guaranteed compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems it solves\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePrevents damage from overcurrent and short circuits on three-phase feeders, protecting wiring insulation and connected equipment.\u003c\/li\u003e \u003cli\u003eMaintains electrical continuity by delivering predictable trip behavior, aiding in accurate fault isolation and faster resets after events.\u003c\/li\u003e \u003cli\u003eEliminates guesswork during installation with a clearly specified bolt-on mounting that yields a solid, vibration-immune connection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure the panelboard or load center is designed for bolt-on MCCBs and matches the FXD63A150L’s footprint and rating.\u003c\/li\u003e \u003cli\u003eVerify all connections are clean and tightened to the manufacturer’s torque specifications to maximize bus contact quality and reduce arcing.\u003c\/li\u003e \u003cli\u003eUse this breaker in applications where a reliable three-phase protection strategy is essential, especially in circuits feeding motors or HVAC equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIn short\u003c\/strong\u003e, the Siemens FXD63A150L is a purpose-built, 3-pole, 150 A, 600 V bolt-on molded case circuit breaker designed to deliver robust, long-term protection in panelboards and load centers. Its secure mounting, dependable thermal-magnetic trip behavior, and OEM-compatible design help you achieve safe, efficient electrical distribution across residential, commercial, and light-industrial settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349796212898,"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_0afa223a-f735-48ee-a21f-1cbca997068f.png?v=1764157023","url":"https:\/\/www.ampstate.com\/products\/siemens-fxd63a150l-150a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}