{"product_id":"siemens-bqd145-45a-277v-1-pole-bolt-on-circuit-breaker","title":"Siemens BQD145 - 45 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens BQD145 — a 45A, 277V, 1-pole bolt-on molded case circuit breaker engineered to safeguard your electrical systems. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, it delivers precise, reliable performance where it matters most.\u003c\/p\u003e \u003ch2\u003eWhy the BQD145 stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, ensuring enduring electrical contact even in environments with movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection performance for both overloads and short circuits, helping prevent nuisance trips and protect connected loads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e designed to pair with matching OEM load centers and panelboards, simplifying replacement and upgrades without compatibility concerns.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial installations where 277V circuits are common, including commercial lighting and equipment feeds.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications\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 BQD145\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 45A\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 \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtect 277V branch circuits in commercial buildings, such as lighting feeders and receptacle circuits in offices, retail spaces, and schools.\u003c\/li\u003e \u003cli\u003eUpgrade or replace aging breakers in panelboards and load centers where a secure bolt-on connection is preferred for vibration-prone environments like mechanical rooms or equipment areas.\u003c\/li\u003e \u003cli\u003eInstall in residential and light industrial settings where single-pole protection is appropriate for individual 277V circuits or equipment feeds.\u003c\/li\u003e \u003cli\u003eEnsure consistent protection in installations that demand robust, field-replaceable components with OEM compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Siemens BQD145, you get a purpose-built solution that aligns with standard panelboard configurations while delivering durable performance and precise protection for 277V single-pole circuits. Choose this bolt-on breaker when you need a dependable, OEM-compatible device that supports secure mounting, reliable trip behavior, and versatile use across residential, commercial, and light industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349767868578,"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_9b05111b-731c-4dc2-a274-cacca974055d.png?v=1764156234","url":"https:\/\/www.ampstate.com\/products\/siemens-bqd145-45a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}