{"product_id":"siemens-lgb3k125b-circuit-breaker","title":"Siemens | LGB3K125B | Circuit Breaker | 125A | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens LGB3K125B Circuit Breaker — a robust 125A, 3-pole solution designed for reliable protection in 3-phase electrical systems. Built to endure demanding environments, this breaker integrates into existing Siemens installations with precision, helping keep power flowing where it matters most.\u003c\/p\u003e \u003cp\u003eDesigned for maintenance, retrofit, and replacement projects, the LGB3K125B fits seamlessly into compatible panels, delivering dependable trip performance and straightforward serviceability. When you’re upgrading or restoring a Siemens-based system, this breaker provides a precise, drop-in fit that minimizes downtime and preserves system integrity.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eAmperage:\u003c\/b\u003e 125A — ideal for protecting feeders and branch circuits in three-phase networks.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePoles:\u003c\/b\u003e 3-Pole — engineered for balanced protection across all three phases.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePart number reference:\u003c\/b\u003e LGB3K125B — the most reliable reference for compatibility; use this to verify fit with your panel model and bus configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBest use cases:\u003c\/b\u003e retrofits, replacements, or new installations that require Siemens-certified 3-pole, 125A protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eImportant compatibility notes:\u003c\/strong\u003e Before ordering, confirm fit and ratings match your panel requirements. The part number LGB3K125B is the definitive reference to ensure proper compatibility and safe electrical performance.\u003c\/p\u003e \u003cp\u003eWhat problems does it solve?\u003c\/p\u003e \u003cul\u003e \u003cli\u003eProvides dependable overload and short-circuit protection for 3-phase circuits, safeguarding downstream equipment and reducing downtime.\u003c\/li\u003e \u003cli\u003eDelivers predictable, coordinated protection across all poles, helping maintain system stability during faults.\u003c\/li\u003e \u003cli\u003eSupports efficient maintenance and retrofit projects within Siemens-compatible panels, keeping your electrical infrastructure up to date.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho is this for?\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFacility managers and maintenance teams upgrading Siemens-based electrical systems.\u003c\/li\u003e \u003cli\u003eElectrical contractors performing panel retrofits or replacements in commercial or industrial settings.\u003c\/li\u003e \u003cli\u003eInstallers restoring service in legacy installations that require a 3-pole, 125A protection device with Siemens compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical installation and handling tips\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAlways ensure power is disconnected and follow lockout\/tagout procedures during installation or replacement.\u003c\/li\u003e \u003cli\u003eVerify panel compatibility by cross-referencing with the LGB3K125B part number and confirm bus configuration matches.\u003c\/li\u003e \u003cli\u003eConsult a licensed electrician if there is any uncertainty about fit, ratings, or mounting requirements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose Siemens for your circuit protection needs?\u003c\/p\u003e \u003cul\u003e \u003cli\u003eProven reliability within Siemens panel ecosystems, backed by manufacturer guidelines and support.\u003c\/li\u003e \u003cli\u003eConsistent trip characteristics across all three poles for balanced, predictable protection.\u003c\/li\u003e \u003cli\u003eDesigned for retrofit-friendly installations, making replacements and upgrades straightforward and durable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426806190242,"sku":"LGB3K125B","price":7595.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/siemens-lgb3k125b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}