{"product_id":"siemens-bqd120-20a-1p-277v-circuit-breaker","title":"Siemens BQD120 20A 1P 277V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens BQD120 — a bolt-on, 20A, 1-pole circuit breaker designed for panelboards, load centers, and electrical distribution. Its retrofit-friendly bolt-on design supports maintenance planning when the part number needs to stay consistent, while a 277V rating makes it a practical choice for commercial circuits and lighting feeders in mid-size facilities. The BQD120 is built to protect a single branch with reliable overcurrent protection, helping you maintain safe and uninterrupted power delivery.\u003c\/p\u003e \u003ch2\u003eWhy the Siemens BQD120 stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e provides a secure, robust fit in panelboards and load centers, simplifying retrofit work and reducing field installation time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e277V rating\u003c\/strong\u003e aligns with typical commercial electrical distribution, so you can protect higher-voltage branches without adapters or workarounds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 20A configuration\u003c\/strong\u003e offers targeted protection for individual circuits, keeping your distribution system simple and easy to manage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart-number continuity\u003c\/strong\u003e supports maintenance planning and inventory control — use BQD120 to match existing protection schemes without surprises.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmpState availability\u003c\/strong\u003e ensures timely access and expert support to confirm compatibility and fit for your system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eKey specifications\u003c\/h2\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: BQD120\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Circuit Breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 20 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 277 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eRetrofit installations in panelboards and load centers where a bolt-on device is preferred for secure mounting and quick swaps.\u003c\/li\u003e \u003cli\u003eProtection of 277V circuits in commercial buildings, including lighting feeders and auxiliary power branches.\u003c\/li\u003e \u003cli\u003eMaintenance planning episodes requiring consistent part numbers to minimize inventory fragmentation.\u003c\/li\u003e \u003cli\u003eNew or replacement installs in facilities that rely on Siemens protection components for long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and practical considerations\u003c\/h2\u003e\n\u003cp\u003eBefore you select the BQD120, verify your panel supports bolt-on breakers and that the mounting hardware is compatible with Siemens’ installation guidelines. Follow standard electrical safety practices, de-energize equipment, and adhere to local codes during replacement or retrofit work. The 277V rating should match the circuit it protects, ensuring proper protection without oversizing or undersizing the breaker.\u003c\/p\u003e \u003ch2\u003eSupport and availability\u003c\/h2\u003e\n\u003cp\u003eAmpState lists the BQD120 as available, with expert assistance to confirm fit and compatibility when you’re upgrading existing panels or planning a retrofit. If you’re matching a part number for a specific installation, reach out for guidance and we’ll help ensure the BQD120 is the right choice for your Siemens-based protection scheme.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410848829602,"sku":"BQD120","price":206.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/siemens-bqd120-20a-1p-277v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}