{"product_id":"siemens-neb1b045b-circuit-breaker","title":"Siemens | NEB1B045B | Circuit Breaker | 45A | 1-Pole | 277V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens NEB1B045B Circuit Breaker — a precise 45A, 1-Pole protection device built for 277V circuits. Designed for maintenance, retrofit, and replacement projects, this breaker is the reliable choice when you need to safeguard single-leg feeds in commercial or light industrial panels that operate at 277V.\u003c\/p\u003e \u003ch3\u003eKey specifications and compatibility you can rely on\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45A protection for single-pole circuits\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole configuration, ideal for a single hot leg with a shared neutral in 277V systems\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 277V, widely used in commercial lighting, HVAC, and auxiliary equipment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference:\u003c\/strong\u003e Part number NEB1B045B is the definitive identifier for fitment with matching Siemens panels and existing NEB-series components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication focus:\u003c\/strong\u003e Retrofit, maintenance, and replacement scenarios where exact specs matter for continued protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWhat makes the NEB1B045B uniquely valuable is its targeted pairing of 45A capacity with a 277V single-pole design. This combination is specifically suited to circuits that power commercial lighting, ceiling fans, and other equipment fed from a 277V distribution system. By choosing the exact part number, you minimize the guesswork in compatibility, reducing panel downtime and ensuring dependable, code-compliant protection where it’s needed most.\u003c\/p\u003e \u003ch3\u003eUse cases and ideal users\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance technicians\u003c\/strong\u003e performing panel diagnostics who need a precise 45A, 1-Pole 277V replacement to restore normal operation quickly.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFacilities managers\u003c\/strong\u003e planning panel retrofits or upgrades in offices, retail spaces, or light industrial environments that rely on 277V circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eElectrical contractors\u003c\/strong\u003e who require a reliable, drop-in compatible breaker to match existing NEB-series configurations during replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEmergency spare inventories\u003c\/strong\u003e to minimize downtime by having an exact-match breaker ready for 277V single-pole circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for installation and ordering\u003c\/h3\u003e\n\u003cp\u003eBefore purchasing, confirm that the panel and rails are compatible with Siemens NEB-type breakers. The part number NEB1B045B serves as the best compatibility reference, ensuring you’re aligning with the exact form factor and trip characteristics your panel expects. Keep in mind the 277V rating as it dictates circuit design and protection strategy for commercial lighting and equipment feeds.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e Confirm fit and ratings before ordering. The part number NEB1B045B is your most reliable reference for compatibility, helping you avoid mismatches during retrofit or replacement projects.\u003c\/p\u003e \u003cp\u003eOpt for the Siemens NEB1B045B Circuit Breaker when you need precise 45A, single-pole protection for 277V circuits. It’s a purpose-built solution that supports efficient maintenance, straightforward retrofits, and dependable protection for critical commercial loads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426809991330,"sku":"NEB1B045B","price":4017.0,"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-neb1b045b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}