{"product_id":"siemens-e21b100-circuit-breaker","title":"Siemens | E21B100 | Circuit Breaker | 100A | 1-Pole | 120V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens E21B100 Circuit Breaker — a purpose-built, high-current protection device designed for reliable performance in compatible panels. With a 100-amp rating, a single pole, and 120-volt operation, this bolt-on breaker delivers robust, predictable protection for demanding circuits while preserving space in the panelboard.\u003c\/p\u003e \u003cp\u003eDesigned for maintenance, retrofit, and replacement projects, the E21B100 shines in scenarios where you need to match exact specs quickly and confidently. The model number \u003cstrong\u003eE21B100\u003c\/strong\u003e is your best reference for compatibility, ensuring a secure fit in Siemens bolt-on panel systems.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 100 A — ideal for high-demand branch circuits such as heavy appliances, HVAC equipment, or subfeed connections in residential or light commercial setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole — compact single-pole protection for 120V circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120V — designed for standard residential\/commercial distribution panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On — provides a secure, mechanical connection to the bus bar in compatible Siemens panels, reducing the risk of loose contacts.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e E21B100 — use this reference to confirm fit and ratings with your panel label or manufacturer documentation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat sets this Siemens breaker apart\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eDirect compatibility with Siemens bolt-on panel systems, enabling straightforward retrofits without modifying the enclosure.\u003c\/li\u003e \u003cli\u003eReliable overload protection for circuits with higher current demands, helping to prevent electrical fires and equipment damage.\u003c\/li\u003e \u003cli\u003eDurable construction designed for repeated cycling and long service life in demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use scenarios\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed 100A, 1-pole breaker in a Siemens panel where bolt-on mounting is required.\u003c\/li\u003e \u003cli\u003eRetrofits that require exact 100A, 1-pole, 120V specifications to support high-demand loads.\u003c\/li\u003e \u003cli\u003eNew installations within compatible service panels where 100A protection is appropriate for a dedicated circuit (e.g., large appliances, water heaters, or HVAC components).\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore ordering, confirm fit and ratings for your exact panel model. The part number \u003cstrong\u003eE21B100\u003c\/strong\u003e is the most reliable reference for compatibility. When installing, follow standard electrical safety practices: turn off the main power, verify the absence of voltage, and secure the breaker firmly to the bus with the bolt-on hardware specified by Siemens for this product.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427186528418,"sku":"E21B100","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a0994f42-7fad-49d1-911a-c2784022b8c9.png?v=1765492979","url":"https:\/\/www.ampstate.com\/products\/siemens-e21b100-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}