{"product_id":"siemens-fd63b125-circuit-breaker","title":"Siemens | FD63B125 | Circuit Breaker | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens FD63B125 Circuit Breaker — 3-Pole\u003c\/strong\u003e is a precision-engineered circuit protection device designed for three-phase electrical systems. This 3-pole breaker is ideal for maintenance, retrofit, and replacement projects where exact Siemens compatibility matters.\u003c\/p\u003e \u003cp\u003eKey compatibility and purpose\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart number FD63B125\u003c\/strong\u003e provides the most reliable reference for compatibility with Siemens panels and the FD63B family.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole configuration\u003c\/strong\u003e designed for three-phase distribution in industrial and commercial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplacement and retrofit ready\u003c\/strong\u003e allows you to match existing specs without second-guessing, helping you maintain system protection and arc-flash safety.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFit and ratings confirmation\u003c\/strong\u003e Always verify fit and ratings prior to ordering — this ensures seamless installation and ongoing protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eHow it works for you\u003c\/p\u003e\n\u003cp\u003eThis FD63B125 breaker slots into compatible Siemens panels with the same frame and mounting geometry, preserving protective coordination and service continuity. When upgrading or maintaining a three‑phase system, using the exact part number helps prevent mismatches that could compromise safety or performance.\u003c\/p\u003e \u003cp\u003eIdeal use cases\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: Regular replacement of worn breakers in service panels to minimize downtime.\u003c\/li\u003e \u003cli\u003eRetrofit: Upgrading older panels to current Siemens protection standards without changing other components.\u003c\/li\u003e \u003cli\u003eReplacement: Quick swap-out for a failed 3-pole unit within a Siemens-compatible system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho benefits most\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eElectrical contractors performing new builds or panel upgrades in factories, offices, and facilities with three-phase power.\u003c\/li\u003e \u003cli\u003eMaintenance teams responsible for reliability and safety of electrical distribution networks.\u003c\/li\u003e \u003cli\u003eFacilities engineers seeking long-term compatibility and easier sourcing with Siemens-only parts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eKeep the FD63B125 in its original packaging until installation to avoid damage or contamination.\u003c\/li\u003e \u003cli\u003eBefore purchasing, compare the part number with your panel’s labeling and documentation to ensure exact match.\u003c\/li\u003e \u003cli\u003eDuring installation, follow all safety protocols for live electrical work and verify that the panel frame and mounting align with Siemens FD63B-series breakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425632407714,"sku":"FD63B125","price":1446.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-fd63b125-circuit-breaker-3-pole-840.webp?v=1789433900","url":"https:\/\/www.ampstate.com\/products\/siemens-fd63b125-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}