{"product_id":"siemens-bqd6120-20a-347v-1-pole-bolt-on-circuit-breaker","title":"Siemens BQD6120 - 20 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens BQD6120—a 20A, 347V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to perform in residential, commercial, and light industrial environments, this unit combines robust mechanical design with precise protection behavior you can trust.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting for a secure, vibration-resistant connection\u003c\/strong\u003e: a rigid bus contact that stays put even in panels subject to vibration or movement, helping maintain consistent protection over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit for stable, repeatable protection\u003c\/strong\u003e: combines thermal overload protection with magnetic instantaneous trip for fast fault isolation, delivering predictable performance across varying temperatures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible compatibility\u003c\/strong\u003e: specifically designed to pair with matching Siemens OEM load centers and panelboards for straightforward installation and reliable integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: ideal for residential service upgrades, commercial distribution panels, and light industrial installations where dependable branch-circuit protection matters most.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe BQD6120 is a single-pole, 20-ampere breaker rated for 347V, making it well-suited for commercial lighting circuits and other 347V distribution panels common in multi-tenant buildings and light manufacturing settings. Its molded-case construction adds durability and long-term reliability in spaces where panels face daily use and occasional vibration.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy choose bolt-on in your panel?\u003c\/strong\u003e Bolt-on breakers like the BQD6120 provide a more solid, vibration-resistant connection than some clip-on designs, reducing the risk of loose contacts that can cause intermittent trips. This makes them particularly well-suited for installations in environments with equipment vibration, door openings, or heavy panel access, where stable performance matters for ongoing uptime.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eUse cases at a glance:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eUpgrading or replacing a 1-pole 20A circuit in a Siemens-compatible panelboard\u003c\/li\u003e \u003cli\u003eProtected lighting and receptacle circuits in commercial buildings with 347V distribution\u003c\/li\u003e \u003cli\u003eSmall to medium power distribution in light industrial panels where reliability is critical\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: BQD6120\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 20A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 347V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 1\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re equipping a residential panel with reliable protection or outfitting a commercial or light industrial distribution system, the Siemens BQD6120 delivers precise trip performance, robust mounting, and seamless integration with Siemens OEM panel hardware. Protect circuits, minimize nuisance trips, and keep critical loads safe with a breaker built to perform when it matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349769998498,"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_b54b9f73-d2ac-4bf1-9549-c9a319c3c994.png?v=1764156277","url":"https:\/\/www.ampstate.com\/products\/siemens-bqd6120-20a-347v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}