{"product_id":"siemens-d140-circuit-breaker","title":"Siemens | D140 | Circuit Breaker | 40A | 1-Pole | 120V | Plug-In","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens D140—your trusted 40A, 1-Pole, 120V plug-in circuit breaker designed for fast, reliable protection in compatible Siemens load centers. Built for maintenance, retrofit, and replacement projects, this breaker delivers precise current control where it matters most, keeping your electrical system safe and code-compliant.\u003c\/p\u003e \u003ch3\u003eCore specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Plug-In\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e D140\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the D140 for your panel\u003c\/h3\u003e\n\u003cp\u003eThe D140 is purpose-built for Siemens panels that require a 40-amp, single-pole, 120-volt plug-in breaker. Its plug-in design enables quick, clean replacements without panel rearrangement, helping you minimize downtime during service or upgrades. Since the part number D140 is the strongest compatibility signal, use it as the primary reference when verifying fit before ordering.\u003c\/p\u003e \u003ch3\u003eUse cases and practical applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential branch circuits that need reliable 40A protection within Siemens load centers.\u003c\/li\u003e \u003cli\u003eRetrofits or panel upgrades where original equipment calls for a plug-in breaker with 120V operation.\u003c\/li\u003e \u003cli\u003eMaintenance replacements that preserve the original panel architecture, ensuring consistent performance and safety.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstall and safety notes\u003c\/h3\u003e\n\u003cp\u003eBefore purchasing and installing, confirm compatibility with your specific Siemens panel model. Always power down the main circuit before replacement and adhere to local electrical codes. If you’re unsure about fit or installation, consult a licensed electrician to verify ratings and proper securement.\u003c\/p\u003e \u003ch3\u003eWhat you get\u003c\/h3\u003e\n\u003cp\u003e1 x Siemens D140 40A, 1-Pole, 120V Plug-In Circuit Breaker.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426659750050,"sku":"D140","price":132.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/siemens-d140-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}