{"product_id":"siemens-bq1b040h-40a-120v-1-pole-bolt-on-circuit-breaker","title":"Siemens BQ1B040H - 40 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens BQ1B040H is a 40A, 120V, 1-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers with precision and reliability. Crafted by Siemens, this unit delivers dependable overcurrent and short-circuit protection while fitting seamlessly into compatible OEM panel systems. It’s an ideal solution for residential, commercial, and light industrial electrical installations where consistent performance matters.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: a rigid, vibration-resistant connection to the bus bar ensures stable conductivity and reduces the risk of loose contacts over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: combines thermal overload protection with instantaneous magnetic trip, delivering stable, repeatable protective behavior across varying load conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 40A, 120V design\u003c\/strong\u003e: targeted protection for individual branch circuits that require 40 amps at standard residential\/commercial voltages.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e: engineered to be a drop-in match for Siemens load centers and panelboards, simplifying replacements and upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e: well-suited for a range of environments—from home electrical panels to light commercial and industrial installations—where reliable circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\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 BQ1B040H\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 120V\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 \u003cp\u003ePractical scenarios where the BQ1B040H shines include upgrading aging panels, replacing failed breakers in Siemens ecosystems, or provisioning new circuits in residential and light commercial setups. When selecting a replacement or expansion, this 1-pole, 40A bolt-on solution provides a reliable balance of fast short-circuit response and predictable overload protection, all while maintaining compatibility with Siemens’ panelboard ecosystems. Trust AmpState to supply a component that aligns with your panel’s design and your project’s safety requirements.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349760266402,"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_3c3ac38a-c588-498e-85da-1c2d7b36a635.png?v=1764156068","url":"https:\/\/www.ampstate.com\/products\/siemens-bq1b040h-40a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}