{"product_id":"siemens-bq3b04000s01-40a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens BQ3B04000S01 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens BQ3B04000S01 is a 40A, 240V, 3-pole bolt-on molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to endure in demanding environments, it pairs rugged mounting with precise protective action to keep critical electrical systems safe and available.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection that maintains consistent electrical contact even in busy panels or equipment rooms.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection performance by automatically responding to both overcurrent and short-circuit conditions with coordinated sensitivity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is engineered to fit matching Siemens load centers and panelboards, simplifying replacements and minimizing custom wiring work.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial deployments where reliable protection is essential for downstream circuits and equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this matters for your electrical protection\u003c\/h3\u003e \u003cp\u003eIn any distribution panel, protection isn’t just about stopping a fault—it’s about preventing nuisance trips, reducing downtime, and extending the life of wiring and devices. The BQ3B04000S01’s bolt-on strategy reduces connection resistance over time, while its thermal-magnetic mechanism ensures the right level of protection kicks in promptly when faults occur. That means fewer unexpected outages and faster recovery for critical loads.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eUpgrading or replacing aging breakers in Siemens panelboards and load centers where 240V, 40A protection is required.\u003c\/li\u003e \u003cli\u003eProtecting multi-wire branch circuits and equipment with consistent trip characteristics across commercial or light industrial spaces.\u003c\/li\u003e \u003cli\u003eInstalling in new or retrofit projects where a robust, bolt-on MCCB solution minimizes vibration-related concerns in mechanical or electrical spaces.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: BQ3B04000S01\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker (MCCB)\u003c\/li\u003e \u003cli\u003eAmperage Rating: 40 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 240 V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349765214370,"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_bf0599bb-8b13-4547-ae10-b038772a141d.png?v=1764156178","url":"https:\/\/www.ampstate.com\/products\/siemens-bq3b04000s01-40a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}