{"product_id":"siemens-ngb1b125b-circuit-breaker","title":"Siemens | NGB1B125B | Circuit Breaker | 125A | 1-Pole | 347V | 25kA | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens NGB1B125B is a bolt-on circuit breaker engineered for reliable overcurrent protection in 347V distribution systems. This 125A, 1-pole unit is designed for maintenance, retrofit, and replacement projects where exact specifications matter, ensuring you get a precise fit and consistent performance in Siemens-compatible panels. With a 25 kA interrupting capacity, it provides robust protection against short-circuit events in commercial or light industrial applications.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e125 A, 1-Pole\u003c\/strong\u003e — compact, straightforward protection for single-series circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt-On mounting\u003c\/strong\u003e — secure, vibration-resistant installation in compatible Siemens panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e347 V rating\u003c\/strong\u003e — suitable for medium-voltage distribution environments that require this voltage class.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 kA interrupting capacity\u003c\/strong\u003e — strong protection against high-energy faults, helping safeguard equipment and wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number NGB1B125B\u003c\/strong\u003e — use this reference to verify compatibility and exact specs with your panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for retrofit and replacement\u003c\/strong\u003e projects where matching the original Siemens spec is essential for reliability and code compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this matters\u003c\/strong\u003e — In electrical distribution, using the correct amperage, voltage rating, and interrupting capacity prevents nuisance trips while delivering dependable protection for feeders, motors, and branch circuits. The NGB1B125B is purpose-built to slot into Siemens bolt-on panels that require a 125A, 1-pole solution, reducing uncertainty during upgrades or service work.\u003c\/p\u003e \u003ch3\u003eUse cases and scenarios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing an aging breaker in a 347V Siemens panel where a 125A, 1-pole breaker is specified.\u003c\/li\u003e\n\u003cli\u003eRetrofit projects upgrading distribution circuits to handle higher fault protection without changing enclosure hardware.\u003c\/li\u003e\n\u003cli\u003eMaintenance intervals that call for exact-match components to maintain panel certification and warranty eligibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cp\u003eAlways verify fit and ratings against the panel’s documentation before ordering. Use the part number NGB1B125B as the primary reference for compatibility. Follow standard bolt-on mounting procedures per Siemens installation guidelines, and ensure conductor sizing and enclosure clearance meet applicable codes and standards.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425677398178,"sku":"NGB1B125B","price":131.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/siemens-ngb1b125b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}