{"product_id":"siemens-lgb3b050b-50a-3p-480v-circuit-breaker","title":"Siemens LGB3B050B 50A 3P 480V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered by Siemens, the LGB3B050B is a 50 A, 3-pole circuit breaker designed to deliver reliable circuit protection in panelboards, load centers, and broader electrical distribution networks. Built for everyday electrical work, this unit shines in retrofit projects and maintenance planning where staying with the same part number is essential for spare parts efficiency and system integrity.\u003c\/p\u003e \u003ch3\u003eKey advantages of the Siemens LGB3B050B\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design\u003c\/strong\u003e provides coordinated protection for three-phase circuits with a common trip, simplifying wiring and fault containment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e50 ampere rating\u003c\/strong\u003e suits feeders and branch circuits that demand steady current without frequent tripping in typical commercial\/industrial loads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e480 V voltage rating\u003c\/strong\u003e aligns with many three-phase distribution schemes used in offices, manufacturing, and data centers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRetrofit-friendly\u003c\/strong\u003e with a consistent part number, reducing inventory complexity and ensuring compatibility with existing Siemens panelboards and distribution devices.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrusted Siemens engineering\u003c\/strong\u003e and robust build quality designed for long-term performance and predictable protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEasy sourcing\u003c\/strong\u003e – available through AmpState, with support to confirm fit if you’re matching a specific part number.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat it protects and where you’ll use it\u003c\/h3\u003e\n\u003cp\u003eThe LGB3B050B serves as a critical safety device in panelboards, load centers, and distribution networks. It shields three-phase circuits from overloads and short circuits, preserving equipment and reducing the risk of electrical fires. Its 3-pole, 480 V capability makes it well-suited for commercial installations, data rooms, and industrial environments where stable power protection is non-negotiable.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRetrofits where the existing part number must be preserved for compliance or asset management.\u003c\/li\u003e \u003cli\u003eMaintenance planning for facilities with three-phase distributions and Siemens equipment.\u003c\/li\u003e \u003cli\u003eNew installations that require a reliable 50 A, 3-pole breaker within 480 V systems.\u003c\/li\u003e \u003cli\u003eSpare-part strategy for service fleets that need consistent, readily available replacements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cp\u003eBefore installing, verify that the panelboard or distribution device accepts LGB-series breakers and that the bus configuration matches a three-pole, 480 V protection scheme. Maintain appropriate torque on terminals as specified by Siemens installation guidelines. If you’re replacing an existing LGB3B050B or matching a part number across a serviceable fleet, AmpState can help confirm compatibility to minimize downtime.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 50 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 480 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LGB3B050B\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eAvailable from AmpState. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410909122722,"sku":"LGB3B050B","price":1178.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-lgb3b050b-50a-3p-480v-circuit-breaker-ampstate-breakers-668.webp?v=1788989218","url":"https:\/\/www.ampstate.com\/products\/siemens-lgb3b050b-50a-3p-480v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}