{"product_id":"siemens-e4b1020-20a-1p-277v-circuit-breaker","title":"Siemens E4B1020 Circuit Breaker, 20A, 1-Pole, 277V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens E4B1020 circuit breaker is built for industrial electrical service, maintenance, and replacement projects. With a 20A rating and a single-pole design for 277V circuits, this breaker delivers reliable overcurrent protection that helps safeguard wiring and critical equipment while minimizing unplanned downtime.\u003c\/p\u003e \u003ch3\u003eKey specs at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 20 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 277V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e E4B1020\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this matters for your operation\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise protection for 277V circuits:\u003c\/strong\u003e A dedicated 20A, 1-pole device designed to protect individual branches in industrial panels from overloads and faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart-number precision:\u003c\/strong\u003e The exact part number E4B1020 ensures you’re selecting the right device for compatibility with your panel and system requirements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-ready reliability:\u003c\/strong\u003e Targeted protection for maintenance and replacement projects, helping to reduce downtime and maintenance costs over time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompatibility and selection guidance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify fit by part number and application requirements to ensure correct installation and reliable performance in your specific panel configuration.\u003c\/li\u003e \u003cli\u003eIf you’re unsure about compatibility, message us and we’ll help confirm that the E4B1020 is the right choice for your equipment and voltage needs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations in industrial control panels where 277V circuits require dependable overcurrent protection.\u003c\/li\u003e \u003cli\u003eMaintenance or replacement projects that demand matching trip characteristics and a familiar Siemens part for easier serviceability.\u003c\/li\u003e \u003cli\u003ePanel upgrades or retrofits where standardized components simplify spare parts management and future servicing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNotes: Always verify fit by part number and application requirements. If you need help matching a part number or confirming compatibility, message us and we’ll assist in identifying the exact device your system needs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46415949955234,"sku":"E4B1020","price":460.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-e4b1020-circuit-breaker-20a-1-pole-277v-breakers-531.webp?v=1789214180","url":"https:\/\/www.ampstate.com\/products\/siemens-e4b1020-20a-1p-277v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}