{"product_id":"siemens-bqd245-45a-480v-2-pole-bolt-on-circuit-breaker","title":"Siemens BQD245 - 45 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens BQD245 is a 2-pole, 45 A, 480 V bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. With secure bolt-on mounting, it creates a rigid, vibration-resistant bus connection, helping maintain reliable electrical performance in demanding environments. The thermal-magnetic trip unit delivers stable, repeatable protection, responding quickly to short circuits while avoiding nuisance trips on normal load fluctuations.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 45 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 480 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a rigid bus connection and reduces the risk of voltage disturbances from vibration in tough installation environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection performance, balancing fast response to faults with resistance to nuisance trips during normal load changes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e is designed to work with matching Siemens load centers and panelboards, making replacements and upgrades straightforward without compromising system integrity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application range\u003c\/strong\u003e supports residential, commercial, and light industrial settings that require dependable 480 V circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replacing existing 2-pole breakers in Siemens-compatible panelboards and load centers within 480 V distribution systems.\u003c\/li\u003e \u003cli\u003eProtecting branch circuits in commercial lighting, HVAC, and other 480 V infrastructure where reliable short-circuit protection is essential.\u003c\/li\u003e \u003cli\u003eIntegrating into new installations in light industrial environments where durable, vibration-resistant connections improve long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation\u003c\/h3\u003e\n\u003cp\u003eThe BQD245 is specifically designed to be compatible with matching OEM Siemens load centers and panelboards, ensuring a cohesive protection solution across your electrical distribution equipment. When installing, verify proper bolt-on mounting alignment to maintain a solid bus connection and confirm that the connected panels are rated for 480 V and 2-pole operation. Follow standard safe installation practices and any panelboard manufacturer guidelines to ensure optimal performance and compliance.\u003c\/p\u003e \u003ch3\u003eTips for reliable protection\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUse in circuits and panels that match the 480 V, 2-pole specification to ensure the breaker operates within its designed thermal-magnetic range.\u003c\/li\u003e \u003cli\u003ePeriodically inspect the bolt-on connection for tightness and signs of wear or corrosion, which can affect protection performance over time.\u003c\/li\u003e \u003cli\u003eWhen upgrading to or from similar Siemens devices, confirm the BQD245’s compatibility with the exact panelboard model to maintain warranty and UL-listed integrity.\u003c\/li\u003e \u003cli\u003eDocument ampacity and voltage ratings in your electrical documentation to prevent mismatched replacements in future maintenance tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349768687778,"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_72cf1b2c-c376-4f13-bf6d-6481f4df808c.png?v=1764156250","url":"https:\/\/www.ampstate.com\/products\/siemens-bqd245-45a-480v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}