{"product_id":"siemens-e21b020-circuit-breaker","title":"Siemens | E21B020 | Circuit Breaker | 1-Pole | 120V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens E21B020 — a purpose-built 1-pole 120V circuit breaker designed for maintenance, retrofit, and replacement projects where exact specifications matter. This model keeps your electrical system protected with a form-fit, function-driven design that mirrors your existing panel hardware.\u003c\/p\u003e \u003ch2\u003ePrecise compatibility you can trust\u003c\/h2\u003e\n\u003cp\u003eThe E21B020 is identified by its part number, making it the most reliable reference when confirming fit. Before you order, verify that the pole count and voltage align with your panel’s requirements. Using the exact part number minimizes guesswork and reduces the risk of mismatches that can lead to tripping or unsafe connections.\u003c\/p\u003e \u003ch2\u003eKey details\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e E21B020\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy it matters for your electrical projects\u003c\/h2\u003e\n\u003cp\u003eWhether you’re performing a routine replacement after a fault, retrofitting a circuit to support additional loads, or maintaining an aging panel, using the correct, single-pole 120V breaker is crucial for consistent protection and safe operation. The E21B020 delivers dependable interruption for a single hot leg, helping to safeguard downstream devices and wiring without unnecessary complexity.\u003c\/p\u003e \u003ch2\u003eHow to use it confidently\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm fit and ratings against your panel’s manufacturer specifications before ordering.\u003c\/li\u003e \u003cli\u003eKeep the part number E21B020 on hand as your primary reference during procurement and future maintenance.\u003c\/li\u003e \u003cli\u003eUse this breaker for standard 120V circuits that require single-pole protection in residential or light commercial environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal for\u003c\/h2\u003e\n\u003cp\u003e electricians, technicians, homeowners, and facilities managers who need a reliable, NEMA-compatible 1-pole 120V circuit breaker for maintenance, retrofit, or replacement work, with a clear, unambiguous reference in the form of the E21B020 part number.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426869956770,"sku":"E21B020","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-e21b020-circuit-breaker-1-pole-120v-274.webp?v=1789633374","url":"https:\/\/www.ampstate.com\/products\/siemens-e21b020-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}