{"product_id":"siemens-bqd340-40a-480v-3-pole-bolt-on-circuit-breaker","title":"Siemens BQD340 - 40 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens BQD340 is a 40A, 480V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to endure vibration and harsh electrical environments, its secure bolt-on mounting ensures a rigid, stable bus connection for consistent protection performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection that stays reliable even in demanding installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by responding to both sustained overloads and short-circuit events, reducing nuisance trips and improving system uptime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for 3-phase systems\u003c\/strong\u003e with a 40A rating, ideal for balanced protection in commercial and light industrial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e480V rating\u003c\/strong\u003e suits higher-voltage panelboards and distribution gear, expanding compatibility beyond basic residential needs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded case, bolt-on style\u003c\/strong\u003e designed for straightforward installation and robust performance in OEM panelboards and load centers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e built to align with matching Siemens load centers and panelboards, ensuring seamless integration and reliable protection across installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho benefits from the Siemens BQD340? electricians and facility managers upgrading or maintaining electrical distribution in homes, small to mid-size commercial spaces, and light-industrial environments. It’s particularly well-suited for panelboard and load center upgrades where a compact, reliable 3-phase protection solution is required, without compromising safety or performance.\u003c\/p\u003e \u003cp\u003eUse cases and scenarios:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtect new or existing 3-phase branch circuits in commercial wiring runs, equipment rooms, or service panels.\u003c\/li\u003e \u003cli\u003eUpgrade aging protection in panelboards where a rugged bolt-on solution can resist vibration and movement in busy electrical rooms.\u003c\/li\u003e \u003cli\u003eReplace a failing breaker in Siemens OEM systems with a compatible, high-visibility 40A protection device that maintains coordinated protection with upstream devices.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey specifications at a glance:\u003c\/p\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 BQD340\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\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 \u003cp\u003eChoosing the Siemens BQD340 means prioritizing long-term reliability, straightforward installation, and compatibility with Siemens’ panelboard ecosystems. When you equip your distribution system with this bolt-on molded case circuit breaker, you’re investing in a proven, high-performance solution that keeps critical circuits protected under varying loads and conditions. AmpState makes it easy to select the right Siemens protection for your 3-phase distribution needs, backed by real-world performance and support.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349769506978,"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_382d2df9-919e-486f-a9c1-a4a534e3e5f2.png?v=1764156266","url":"https:\/\/www.ampstate.com\/products\/siemens-bqd340-40a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}