{"product_id":"siemens-b120-20a-120v-1-pole-bolt-on-circuit-breaker","title":"Siemens B120 - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B120 is a compact, reliable solution for protecting individual branch circuits in residential, commercial, and light industrial panelboards. At 20 amps and 120 volts, this 1-pole, bolt-on molded case circuit breaker delivers dependable overcurrent and short‑circuit protection where it matters most.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the Siemens B120 20A 1-Pole Bolt-On Breaker?\u003c\/strong\u003e Its bolt-on mounting creates a rigid, vibration‑resistant connection to the bus, helping to maintain a consistent electrical pathway even in environments with everyday movement or vibration. The thermal‑magnetic trip unit provides stable, repeatable protection across a range of temperatures and conditions, ensuring the same trip behavior whether it’s hot or cool, quiet or busy load conditions. Designed to work alongside matching OEM load centers and panelboards, it offers a seamless, reliable replacement or upgrade within existing Siemens systems.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey benefits at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a solid, vibration-resistant connection to the bus for long‑lasting performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip\u003c\/strong\u003e delivers consistent protection against both overcurrent and short circuits, reducing nuisance trips and promoting safer operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible fit\u003c\/strong\u003e guarantees reliable integration with Siemens load centers and panelboards’ design, layout, and labeling.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e ideal for residential panels, small commercial setups, and light industrial circuits needing dependable single‑pole protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\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 B120\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 20A\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 \u003cp\u003e\u003cstrong\u003eWho is this for?\u003c\/strong\u003e Homeowners upgrading an older panel, electricians stocking a reliable go‑to for common 120V branch circuits, property managers maintaining multi‑unit buildings, and small business owners needing compliant, easy-to-install protection for lighting, outlets, and other 120V loads.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical tips\u003c\/strong\u003e — When replacing or adding protection, pair the B120 with a compatible Siemens load center to ensure consistent performance, clear labeling, and smooth operation during inspections. For best results, follow standard installation practices for bolt-on breakers and verify that the panel’s bus connections are clean and free of corrosion before mounting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349744111778,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-b120-20-a-120-v-1-pole-bolt-on-circuit-breaker-ampstate-490.webp?v=1788719969","url":"https:\/\/www.ampstate.com\/products\/siemens-b120-20a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}