{"product_id":"square-d-a1b120-circuit-breaker","title":"Square D | A1B120 | Circuit Breaker | 20A | 1-Pole | 120V | 10kA | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D A1B120 is a purpose-built 20A, 1-pole circuit breaker designed to protect 120V branch circuits with a robust bolt-on mounting. Built for maintenance, retrofit, and replacement, this unit delivers a dependable solution when your panel requires exact compatibility and a secure connection.\u003c\/p\u003e \u003ch2\u003eKey specifications at a glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 20A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInterrupting Capacity:\u003c\/strong\u003e 10kA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e A1B120\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cp\u003eDesigned for compatibility and dependable performance, the A1B120 is ideal when you need a precise match for your Square D panel. The bolt-on design provides a secure, vibration-resistant connection that stays put through load fluctuations, making it a smart choice for retrofit projects and field replacements where panel alignment and mounting style matter.\u003c\/p\u003e \u003ch2\u003eUse cases and practical applications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eResidential and light commercial circuits where a single 120V branch needs reliable protection\u003c\/li\u003e \u003cli\u003ePanel maintenance and retrofits where the A1B120 matches the panel’s rated configuration\u003c\/li\u003e \u003cli\u003eReplacement of a failed or worn 20A, 1-pole breaker in compatible Square D installations\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and compatibility tips\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, confirm fit and ratings to ensure seamless integration. The part number A1B120 is the most trustworthy reference for compatibility with your Square D panel. If you’re replacing an existing unit, verify that the panel location accepts a bolt-on 1-pole breaker and that your circuit requires a 20A, 120V protection with a 10kA interrupting capacity.\u003c\/p\u003e \u003ch2\u003eWhat problems it solves\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePrevents overcurrent damage on 120V branch circuits by providing precise overcurrent protection\u003c\/li\u003e \u003cli\u003eDelivers a secure, durable mounting solution that stays aligned through electrical load changes\u003c\/li\u003e \u003cli\u003eOffers a straightforward path for maintenance, replacement, or retrofit without overhauling the panel\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eHow it compares to other options\u003c\/h2\u003e\n\u003cp\u003eCompared to plug-on variants, the Bolt-On A1B120 provides a sturdier mechanical connection, which can be preferable in panels subjected to vibrations or higher ambient temperatures. Its 10kA interrupting rating offers strong protection for typical residential circuits, while the 1-pole configuration is ideal for individual 120V circuits rather than multi-pole 240V layouts.\u003c\/p\u003e \u003ch2\u003eBuying confidence and next steps\u003c\/h2\u003e\n\u003cp\u003eIf your project requires exact compatibility, a 20A, 1-pole, 120V breaker with a bolt-on mount, the Square D A1B120 delivers the right combination of safety, reliability, and ease of installation. Add it to your cart to complete your repair, retrofit, or replacement with assurance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46425609535650,"sku":"A1B120","price":310.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-a1b120-circuit-breaker-20a-1-pole-120v-10ka-bolt-256.webp?v=1789429309","url":"https:\/\/www.ampstate.com\/products\/square-d-a1b120-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}