{"product_id":"square-d-992140","title":"Square D 992140 40A 1-Pole 120 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D 992140 40A 1-Pole 120 V Circuit Breaker — a genuine Square D protection device engineered to safeguard a dedicated 120-volt circuit. With a precise 40-amp rating and a single-pole design, this breaker provides reliable overcurrent protection for individual loads while fitting seamlessly into compatible Square D panels. Part number 992140 identifies the exact component you need for replacement or upgrade, helping you maintain consistent electrical performance across your system.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 992140\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat makes this 992140 stand out\u003c\/h3\u003e\n\u003cp\u003eThis isn’t a generic breaker. The Square D 992140 is built to match Square D’s engineering standards, delivering dependable protection for a specific 120V circuit. Its 1-pole construction means it interrupts only the hot conductor for a single circuit, helping you isolate and protect individual loads without unnecessary disruption to other circuits. Using the exact part number ensures compatibility with Square D panels and the expected trip characteristics, so you can trust it to perform when it matters most.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDedicated 120V branch circuits in workshops or garages that require up to 40 amps of protection\u003c\/li\u003e \u003cli\u003eHeavy-load 120V devices such as large power tools, compressors, or high-draw equipment that operate on a single hot conductor\u003c\/li\u003e \u003cli\u003eReplacement for a failed or worn-out 1-pole 40A breaker in compatible Square D panels\u003c\/li\u003e \u003cli\u003eResidential or light commercial electrical setups where precise, single-circuit protection is essential\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy it solves real-world problems\u003c\/h3\u003e\n\u003cp\u003eOvercurrent protection prevents wiring insulation damage and reduces the risk of electrical fires by shutting the circuit down before overheating occurs. The 40A rating is chosen for loads that draw significant current, while the 1-pole configuration keeps installation straightforward in 120V circuits. By using the exact Square D 992140, you’re selecting a component designed to work reliably with your existing panel architecture, minimizing compatibility issues and easing future maintenance.\u003c\/p\u003e \u003ch3\u003eInstallation and safety tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePower down the main breaker before removing or installing a new 1-pole breaker\u003c\/li\u003e \u003cli\u003eVerify that the circuit’s wiring gauge and load align with a 40A protection device (typically matching ampacity to the wire size)\u003c\/li\u003e \u003cli\u003eInstall only in panels that specify compatibility with Square D 1-pole breakers of this type\u003c\/li\u003e \u003cli\u003eEnsure proper seating on the bus and secure connections to prevent arcing or intermittent tripping\u003c\/li\u003e \u003cli\u003eLabel the circuit clearly after installation to reflect its purpose and load\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eArchitected for durability and reliability\u003c\/h3\u003e\n\u003cp\u003eDesigned to perform consistently under normal operating conditions, the Square D 992140 combines precise electrical characteristics with robust construction. This makes it a practical, long-lasting choice for maintaining safe, controlled power in 120V applications where a dedicated branch circuit requires up to 40 amps of protection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423256072354,"sku":"992140","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-992140","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}