{"product_id":"siemens-heb1b020b-20a-277v-1-pole-bolt-on-circuit-breaker","title":"Siemens HEB1B020B - 20 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens HEB1B020B is a purpose-built solution for dependable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a 20A rating and 277V capability in a compact 1-pole, bolt-on molded case design, it’s ready to guard commercial, residential, and light industrial circuits against faults while fitting neatly into standard Siemens panel builds.\u003c\/p\u003e \u003ch2\u003eWhy this 1-pole bolt-on breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection that stays put even in environments subject to movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection performance. The thermal element handles gradual overcurrent, while the magnetic element responds quickly to short circuits, helping prevent damage to wiring and connected equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is specifically matched for use with Siemens panelboards and loadcenters, ensuring reliable fit, alignment, and electrical continuity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple settings\u003c\/strong\u003e ideal for residential, commercial, and light industrial applications where reliable 20A protection at 277V is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhere and how it shines\u003c\/h2\u003e\n\u003cp\u003eUse the Siemens HEB1B020B to protect branch circuits in panelboards and loadcenters that serve lighting, receptacle runs, small motors, HVAC controls, and auxiliary equipment in commercial spaces, or in modern residential systems with higher voltage requirements. The 277V rating broadens its utility for commercial lighting circuits and other 277V distribution scenarios, making it a practical choice for retrofit projects and new builds alike.\u003c\/p\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrong manufacturer:\u003e Siemens\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HEB1B020B\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 277V\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 \u003ch2\u003ePractical tips for best results\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePair this breaker with compatible Siemens panelboards and loadcenters to ensure seamless mechanical fit and electrical performance.\u003c\/li\u003e \u003cli\u003eWhen installing, ensure the bolt-on connection is tightened to secure, vibration-free contact between the breaker and the busbar to maintain consistent protection behavior.\u003c\/li\u003e \u003cli\u003eUse in circuits where 277V distribution is standard, such as certain commercial lighting and equipment feeds, to maximize protection coverage without overengineering the solution.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eAvailable through AmpState, the Siemens HEB1B020B delivers a reliable, purpose-built protection solution that blends robust mechanical design with precise thermal-magnetic trip performance. Whether you’re upgrading an existing panel or specifying equipment for a new installation, this 20A, 277V, 1-pole bolt-on breaker helps you safeguard circuits with clarity and confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349797720226,"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_15012140-b277-400c-a369-00c59eb42855.png?v=1764157087","url":"https:\/\/www.ampstate.com\/products\/siemens-heb1b020b-20a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}