{"product_id":"siemens-b2125-125a-240v-2-pole-bolt-on-circuit-breaker","title":"Siemens B2125 - 125 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B2125 is a dependable, high-performance 125A, 240V, two-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers. Its robust bolt-on mounting delivers a rigid, vibration-resistant bus connection, helping maintain reliable protection even in environments with equipment vibration or movement.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e125A at 240V\u003c\/strong\u003e – ideal for safeguarding sizable feeders and critical loads in residential, commercial, and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e2-pole design\u003c\/strong\u003e – provides complete 240V protection for circuits that require two hot legs and a common trip.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e – ensures a secure, long-lasting connection to the bus, reducing the risk of loose contacts and nuisance trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e – combines thermal overload protection with magnetic short-circuit protection for stable, repeatable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e – engineered to match Siemens OEM panelboards and load centers for a clean, reliable fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e – suitable for residential panels, commercial distribution, and light industrial circuits where dependable overcurrent protection is critical.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy the B2125 matters for your electrical safety\u003c\/h3\u003e\n\u003cp\u003eIn everyday electrical systems, consistent protection against overcurrent and short circuits is non-negotiable. The B2125’s bolt-on design locks into place for a solid bus connection, minimizing movement that can compromise touch-safe clearances and electrical continuity. The thermal-magnetic trip unit reacts to real fault conditions, delivering prompt protection for high-inrush loads without excessive nuisance tripping, so you can rely on protected circuits day in and day out.\u003c\/p\u003e \u003ch3\u003eUse cases and ideal scenarios\u003c\/h3\u003e\n\u003cp\u003eChoose the B2125 when you need a rugged, 2-pole solution for 240V circuits such as large appliances, main feeders, HVAC equipment, water heating, or lighting and receptacle circuits in spaces where panel security and stable operation are essential. It’s the practical choice for replacements in Siemens-compatible panelboards, ensuring continuity of protection without compatibility concerns.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\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: B2125\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: 125A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles\u003c\/strong\u003e: 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style\u003c\/strong\u003e: Bolt-on\u003c\/li\u003e \u003cli\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003eBranch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor reliable, site-tested protection that fits seamlessly with Siemens panels, the B2125 stands out as a practical, long-term solution. It delivers the protection your electrical system demands with a mounting and trip design that ensures consistent performance across residential, commercial, and light industrial environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349747749026,"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_d63e1082-48cc-467c-900a-db089bcc74e1.png?v=1764155809","url":"https:\/\/www.ampstate.com\/products\/siemens-b2125-125a-240v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}