{"product_id":"square-d-qo-40-amps-plug-in-single-pole-circuit-breaker","title":"Square D QO 40 amps Plug In Single Pole Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QO 40 amps Plug-In Single Pole Circuit Breaker is engineered for dependable, straightforward protection inside indoor electrical panels. As part of the trusted QO family, this breaker delivers precise overcurrent protection for a single branch circuit, with the reliability you expect from Square D.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage and configuration:\u003c\/strong\u003e 40 A, single-pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120\/240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting type:\u003c\/strong\u003e Plug-In for quick, secure connection to compatible QO panels\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSeries and branding:\u003c\/strong\u003e QO series from Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePhysical footprint:\u003c\/strong\u003e Width 0.75 in, Depth 3.0 in, Height 0.75 in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndoor use:\u003c\/strong\u003e Designed for indoor panel installations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Sleeve packaging for safe handling and storage\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL Listed and CSA Listed\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Specifically designed for plug-in installation in Square D QO panels\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis 40 A plug-in breaker protects high-load branch circuits from overloads, helping keep wiring, devices, and occupants safe. The single-pole design is ideal for dedicated 240 V lines that require robust protection without complicating wiring or panel space. Whether you’re upgrading an aging panel, replacing a failed breaker, or configuring a new circuit, this QO plug-in breaker delivers the reliability you need in everyday residential and light commercial applications.\u003c\/p\u003e \u003cp\u003ePractical use cases include safeguarding circuits for large-appliance outlets, heat-pump or air-conditioning circuits, or other 240 V loads where a single-pole 40 A protection device is appropriate. Its plug-in format simplifies installation and replacement in compatible QO panels, reducing downtime and compatibility concerns during electrical work.\u003c\/p\u003e \u003cp\u003eTips for optimal results:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify your panel is a compatible Square D QO model designed for plug-in breakers before installing.\u003c\/li\u003e \u003cli\u003eTurn off the main power and confirm the circuit you’re protecting matches the breaker’s 40 A rating.\u003c\/li\u003e \u003cli\u003eHandle with care to avoid damaging the sleeve packaging and ensure a clean, secure seating in the panel bus.\u003c\/li\u003e \u003cli\u003eAlways follow local electrical codes and, if in doubt, consult a licensed electrician.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":52197925716242,"sku":"3062361","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/3062361_A.eps_High.jpg?v=1776205383","url":"https:\/\/nationalhardwaregroup.com\/products\/square-d-qo-40-amps-plug-in-single-pole-circuit-breaker","provider":"National Hardware Group","version":"1.0","type":"link"}