{"product_id":"square-d-qob120afi-20a-1-pole-bolt-on-circuit-breaker","title":"Square D QOB120AFI - 20 A, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB120AFI — a reliable 20A, 1-pole bolt-on molded case circuit breaker engineered for dependable branch-circuit protection in panelboards and loadcenters. Its rugged bolt-on mounting creates a solid bus connection, minimizing vibration-induced movement and ensuring consistent performance in busy electrical environments.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant connection to the bus, reducing loosening risks in panels and during equipment operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a wide range of temperatures and load conditions, helping prevent nuisance trips while safeguarding circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 20A rating\u003c\/strong\u003e is ideal for protecting individual branch circuits such as lighting, outlets, or small equipment branches without over-tripping other circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is built to fit with matching Square D load centers and panelboards, simplifying replacements and upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments where reliable, compact protection is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or aging breaker in Square D panelboards and loadcenters without changing the entire enclosure.\u003c\/li\u003e \u003cli\u003eUpgrading branch circuits in residential wiring, small offices, retail spaces, or light industrial setups that need dependable overcurrent protection.\u003c\/li\u003e \u003cli\u003eRetrofitting or expanding panel capacity while maintaining consistent protection characteristics across circuits.\u003c\/li\u003e \u003cli\u003eSituations requiring a compact, bolt-on solution that resists vibration and optimizes bus connections.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical overview\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e QOB120AFI\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 20A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure you’re installing the QOB120AFI into a compatible OEM panelboard or load center designed for bolt-on molded case breakers.\u003c\/li\u003e \u003cli\u003eFollow standard electrical safety procedures and the panel’s installation instructions when performing replacements or upgrades.\u003c\/li\u003e \u003cli\u003eBecause the unit is thermal-magnetic, it responds quickly to overcurrent events while minimizing unnecessary tripping from temporary surges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355406782626,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_9e8d4e38-4b35-4453-b8c8-ca2e2b7b855b.png?v=1764691891","url":"https:\/\/www.ampstate.com\/products\/square-d-qob120afi-20a-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}