{"product_id":"siemens-ngb2b125b-circuit-breaker","title":"Siemens | NGB2B125B | Circuit Breaker | 125A | 2-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for reliability and precise protection, the Siemens NGB2B125B circuit breaker delivers 125 amperes of overcurrent protection in a compact 2-pole package for 600V systems.\u003c\/p\u003e \u003cp\u003eDesigned for maintenance, retrofit, and replacement projects where your panel specs must align exactly, this NGB2B125B model fits where Siemens part numbers are the authoritative compatibility reference.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 125 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Two-pole design enabling simultaneous disconnection of both conductors\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this 2-pole 125A breaker matters\u003c\/h3\u003e\n\u003cp\u003eIn residential and commercial panels, a 2-pole 125A breaker protects circuits that draw higher currents or involve multi-wire branch configurations. With a 600V rating, it is suitable for a range of distribution equipment and industrial controls while maintaining safe shutdown of both lines in the event of a fault. This reduces the risk of arcing and ensures your equipment trips together, supporting code-compliant protection for shared-neutrals.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or worn-out 125A two-pole breaker in a Siemens-compatible panel\u003c\/li\u003e \u003cli\u003eRetrofit projects where existing equipment requires exact 125A, 2-pole, 600V specifications\u003c\/li\u003e \u003cli\u003eUpgrading older protection to a robust two-pole device that safeguards both hot conductors as part of a multi-wire branch circuit\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it compares to typical alternatives\u003c\/h3\u003e\n\u003cp\u003eCompared with smaller or single-pole devices, the NGB2B125B provides coordinated protection for two live conductors and immediate trip on faults affecting either pole. Its 600V rating expands applicability to higher-voltage distribution panels and industrial controls, delivering reliable protection where the full 125A capacity is required. Always verify that the exact part number matches the panel's acceptance, as the NGB2B125B is the best compatibility reference.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Confirm fit and ratings before ordering. The part number is the best reference for compatibility.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425646661794,"sku":"NGB2B125B","price":4238.0,"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-ngb2b125b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}