{"product_id":"siemens-bq2b125-125a-240v-2-pole-bolt-on-circuit-breaker","title":"Siemens BQ2B125 - 125 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens BQ2B125 is a 125 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and loadcenters. Built for environments where connections must stay solid under vibration, this breaker locks onto the bus with a secure bolt-on mounting, helping minimize movement that can lead to loose connections over time.\u003c\/p\u003e \u003cp\u003eWith a thermal-magnetic trip unit, the BQ2B125 provides stable, repeatable protection against both overloads and short circuits. The thermal element handles gradual overcurrent, while the magnetic element responds quickly to high-current faults, helping protect wiring and devices from damage and reducing nuisance trips in everyday use.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRigid bolt-on mounting\u003c\/strong\u003e keeps the breaker firmly connected to the bus, supporting long-term reliability in vibration-prone installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection\u003c\/strong\u003e delivers predictable trip behavior, so you know exactly when and why the breaker will trip.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is built to work with matching Siemens loadcenters and panelboards for a cohesive, plug‑and‑play installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile across applications\u003c\/strong\u003e suitable for residential, commercial, and light industrial panel setups, giving you a single solution for multiple environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch4\u003eTechnical specifications at a glance\u003c\/h4\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: BQ2B125\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 125 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 240 V\u003c\/li\u003e \u003cli\u003eNumber of poles: 2\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 \u003cp\u003eDesigned for reliable performance in panelboards and loadcenters, the Siemens BQ2B125 helps you protect circuits with confidence. Whether upgrading an existing installation or outfitting a new panel, this 2-pole, bolt-on breaker delivers dedicated protection for your home or small-to-mid-size commercial electrical systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349763772578,"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_709674ca-4e00-4fb6-878c-778e96a5f303.png?v=1764156139","url":"https:\/\/www.ampstate.com\/products\/siemens-bq2b125-125a-240v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}