{"product_id":"siemens-q140h-40a-120v-1-pole-plug-in-circuit-breaker","title":"Siemens Q140H - 40 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens Q140H is a robust 40A, 120V, 1-pole plug-in molded case circuit breaker engineered to protect branch circuits with precision. Designed for panelboards and load centers, this breaker delivers fast installation and dependable protection when and where you need it most.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and easy replacement, minimizing downtime during upgrades or service calls.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection—responding to overloads and short circuits with predictable, nuisance-free performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e ensures a reliable fit with matching Siemens load centers and panelboards, delivering verified safety and seamless operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 40A, 120V\u003c\/strong\u003e configuration tailored for residential, commercial, and light industrial applications requiring dedicated branch-circuit protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-in molded case construction\u003c\/strong\u003e combines compact form with solid protection, facilitating clean panel installation and straightforward maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems the Siemens Q140H solves\u003c\/h3\u003e\n\u003cp\u003eThe Q140H shields wiring and devices from overcurrent and short circuits on branch circuits, reducing the risk of overheating and electrical fires. Its precise thermal-magnetic trip behavior helps ensure circuits disconnect promptly during faults while avoiding unnecessary trips during minor surges. This makes it an ideal choice for spaces where reliability and serviceability matter—homes, workplaces, and light manufacturing environments alike.\u003c\/p\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e Q140H\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 120V\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 Plug-in\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\u003eIdeal use cases and practical applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential subpanels protecting lighting, outlets, and dedicated circuits with straightforward plug-in replacement.\u003c\/li\u003e \u003cli\u003eCommercial spaces requiring reliable protection for individual branches without complex wiring changes.\u003c\/li\u003e \u003cli\u003eLight industrial environments where fast maintenance and dependable fault clearing are essential.\u003c\/li\u003e \u003cli\u003eUpgrades or retrofits in panelboards that demand compatible Siemens components for safe, code-compliant operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation tips and compatibility notes\u003c\/h3\u003e\n\u003cp\u003eFor optimal performance, pair the Siemens Q140H with matching OEM load centers and panelboards designed for this 1-pole, 40A unit. Ensure the panel’s compatibility with plug-in molded case breakers and follow standard electrical safety practices during installation. When replacing an existing breaker, verify amperage, voltage rating, and pole count to maintain correct protection levels and circuit labeling throughout the panel.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355153813666,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_42001bb5-9fed-4a80-854c-b14beb37a143.png?v=1764689679","url":"https:\/\/www.ampstate.com\/products\/siemens-q140h-40a-120v-1-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}