{"product_id":"siemens-b140-40a-120v-1-pole-bolt-on-circuit-breaker","title":"Siemens B140 - 40 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B140 is a reliable, purpose-built protection device designed to keep branch circuits safe in panelboards and loadcenters. At 40A and 120V, this 1-pole bolt-on circuit breaker delivers sturdy, dependable overcurrent protection for everyday electrical loads in residential, commercial, and light industrial settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection for dependable performance and long-term reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by reacting to both overload and short-circuit conditions, reducing nuisance trips and ensuring rapid response when faults occur.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 40A, 120V\u003c\/strong\u003e design—compact, straightforward protection for individual circuits in panelboards and loadcenters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded case construction\u003c\/strong\u003e engineered for durability in demanding electrical environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e with matching Siemens load centers and panelboards, making replacements and upgrades clean and hassle-free.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters: the combination of bolt-on mounting and a thermal-magnetic trip means you get a shielded, long-lasting breaker that stays firmly seated while offering precise protection tailored to your circuit’s needs. It’s a smart choice for systems that demand reliable fault protection without complex installation steps.\u003c\/p\u003e \u003ch3\u003eTechnical Details\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 B140\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 Bolt-on\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 Scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replacing a failing breaker in residential panelboards or commercial loadcenters that require a 40A, 120V, single-pole device.\u003c\/li\u003e \u003cli\u003eProtecting individual circuit branches that feed heavy-load appliances or components operating at 120V.\u003c\/li\u003e \u003cli\u003eSituations where secure, vibration-resistant connections are important due to equipment location or ambient conditions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation \u0026amp; Compatibility Tips\u003c\/h3\u003e\n\u003cp\u003ePair this bolt-on breaker with Siemens OEM panelboards or loadcenters that support bolt-on protection devices. Ensure the panel is rated for the same voltage and that the circuit requires a 40A, 120V, 1-pole breaker. When installing, follow the panel manufacturer’s torque specifications to secure the breaker firmly to the bus, ensuring optimal electrical contact and reliable trip performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349746372770,"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_3ebe5d77-bc70-49f4-8627-fc70c058a619.png?v=1764155768","url":"https:\/\/www.ampstate.com\/products\/siemens-b140-40a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}