{"product_id":"siemens-ed21b090-circuit-breaker","title":"Siemens | ED21B090 | Circuit Breaker | 1-Pole","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens ED21B090 1-Pole Circuit Breaker—a reliable, easy-to-specify solution for electrical panels. Built to support maintenance, retrofit, and replacement projects, this single-pole breaker helps you restore safe, controlled power to a circuit with confidence.\u003c\/p\u003e \u003ch3\u003eKey Details\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e ED21B090\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference:\u003c\/strong\u003e The ED21B090 part number is your best reference for compatibility; confirm fit and ratings before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this 1-Pole Siemens breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWith Siemens engineering behind it, this ED21B090 unit provides dependable overcurrent protection for single-phase circuits in compatible panels. It’s designed to fit where a matching spec is required, making it a straightforward choice for service technicians and DIYers working within Siemens ecosystems.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: replace worn or tripped breakers to restore reliable circuit protection.\u003c\/li\u003e \u003cli\u003eRetrofit: upgrade older installations that require a Siemens-compliant 1-pole breaker.\u003c\/li\u003e \u003cli\u003eReplacement: swap in a like-for-like unit when a circuit breaker has reached its end of life.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance \u0026amp; installation notes\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways verify fit and ratings before ordering. The ED21B090 part number is the best compatibility reference.\u003c\/li\u003e \u003cli\u003ePower down the panel and follow proper safety procedures during replacement (consult a licensed electrician if unsure).\u003c\/li\u003e \u003cli\u003eKeep a copy of your panel labeling handy to confirm that a 1-Pole Siemens breaker is the correct choice for the protected circuit.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Siemens ED21B090 1-Pole Circuit Breaker for a dependable, spec-aligned replacement that keeps your electrical system safe and compliant.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427489894562,"sku":"ED21B090","price":346.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/siemens-ed21b090-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}