{"product_id":"square-d-9999sp28r-circuit-breaker","title":"Square D 9999SP28R - Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D 9999SP28R, a molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Available from AmpState, this unit brings precise protection and seamless compatibility to residential, commercial, and light industrial electrical systems.\u003c\/p\u003e \u003ch2\u003eCompact, space‑saving protection with reliable performance\u003c\/h2\u003e \u003cp\u003eThe 9999SP28R features a \u003cstrong\u003ecompact molded case design\u003c\/strong\u003e that maximizes panel space without compromising safety. Its \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining thermal sensing for overloads with magnetic tripping for immediate response to short circuits. This means fewer nuisance trips and more predictable operation when hard faults occur.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient design\u003c\/strong\u003e optimizes panel layout while maintaining full protection capabilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip\u003c\/strong\u003e provides fast, reliable response to overloads and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e engineered to integrate with matching Square D load centers and panelboards for a seamless fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suited for \u003cem\u003eresidential\u003c\/em\u003e, \u003cem\u003ecommercial\u003c\/em\u003e, and \u003cem\u003elight industrial\u003c\/em\u003e environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical details\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 9999SP28R\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\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\u003eUse cases and practical benefits\u003c\/h3\u003e \u003cp\u003eWhether you’re upgrading an older panel, configuring a new installation, or refreshing a service entrance, the 9999SP28R delivers dependable protection with straightforward integration. Practical scenarios include:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eUpgrading panelboards in homes or multi‑unit buildings to improve protection and reliability\u003c\/li\u003e \u003cli\u003eReplacing aging breakers in light commercial panels to maintain code‑compliant safety margins\u003c\/li\u003e \u003cli\u003eFeeding critical branch circuits (lighting, outlets, small equipment) with proven protection against overcurrent and faults\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e \u003cp\u003eThis Square D molded case breaker is designed to align with the exact electrical characteristics of OEM panelboards, promoting cohesive protection schemes and minimizing compatibility concerns. The result is predictable trip behavior, cleaner panel coordination, and long‑term reliability across a variety of installations.\u003c\/p\u003e \u003cp\u003eUpgrade your protection today with the Square D 9999SP28R and enjoy precise, balanced performance in a compact form factor—made to fit where space is at a premium and protection is non‑negotiable.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355170590882,"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_060eb868-47bc-470f-af0f-6b8f94d68759.png?v=1764690007","url":"https:\/\/www.ampstate.com\/products\/square-d-9999sp28r-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}