{"product_id":"siemens-lgb1b045b-circuit-breaker","title":"Siemens | LGB1B045B | Circuit Breaker | 45A | 1-Pole | 277V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens LGB1B045B Circuit Breaker is your reliable, purpose-built solution for protecting 277-volt circuits with a precise 45-amp capacity. As a genuine Siemens part, it’s designed to integrate smoothly into compatible panels for maintenance, retrofit, or replacement projects where exact specifications matter.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 277V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Part number LGB1B045B is the clearest reference for matching to the right panel or bus configuration\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters: in commercial and industrial settings, 277V circuits power essential lighting and equipment. A correctly rated 1-pole breaker at 45A ensures reliable protection against overloads and short circuits, helping to prevent downtime and electrical faults in busy facilities.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance jobs in existing Siemens panels that require a precise 277V, 45A, 1-pole protection device\u003c\/li\u003e \u003cli\u003eRetrofit projects where electrical loads have been updated and a like-for-like replacement is necessary\u003c\/li\u003e \u003cli\u003eReplacement of failed breakers to restore circuit protection quickly and safely\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey benefits you’ll notice with the LGB1B045B:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAuthentic Siemens component engineered for dependable operation and long service life\u003c\/li\u003e \u003cli\u003eClear, definitive compatibility reference: use the LGB1B045B part number to confirm fit before ordering\u003c\/li\u003e \u003cli\u003eStreamlined maintenance and stocking for service teams who manage 277V panels and lighting infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical guidance for ordering and installation (without overhauling your system): verify that the panel you’re working with supports a 277V, 1-pole, 45A breaker, and use the LGB1B045B part number as the best reference for compatibility. This reduces guesswork and speeds up turnaround on critical service calls.\u003c\/p\u003e \u003cp\u003eFor engineers, facilities managers, and electricians who value precise specs and dependable performance, the Siemens LGB1B045B is a straightforward, field-proven choice for protecting 277V circuits with the right amperage and a single pole. When you need a replacement that aligns exactly with your existing setup, this is the targeted, trustworthy option.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426196410530,"sku":"LGB1B045B","price":10854.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-lgb1b045b-circuit-breaker-45a-1-pole-277v-852.webp?v=1789532144","url":"https:\/\/www.ampstate.com\/products\/siemens-lgb1b045b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}