{"product_id":"siemens-q2125b-125a-240v-2-pole-plug-in-circuit-breaker","title":"Siemens Q2125B - 125 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens Q2125B is a 125A, 240V, 2-pole plug-in molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.\u003c\/p\u003e \u003cp\u003eKey advantages include a fast plug-in connection that simplifies installation and replacements, and a thermal-magnetic trip unit that combines fast response to short circuits with stable, repeatable overload protection. When a fault or overload occurs, the magnetic element trips for a rapid shutdown, while the thermal element handles gradual heat build-up for protection that's consistent over time.\u003c\/p\u003e \u003ch2\u003eDesigned for seamless Siemens OEM compatibility\u003c\/h2\u003e\n\u003cp\u003eThis 2-pole, 125A breaker is designed to fit Siemens OEM load centers and panelboards, ensuring proper fit, electrical coordination, and reliable performance with your existing system. Its plug-in mounting makes swaps quick and clean, with fewer tools and less downtime during service or upgrades.\u003c\/p\u003e \u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cp\u003ePerfect for residential panels, commercial electrical rooms, and light industrial installations where robust branch circuit protection is required. The Q2125B guards against overcurrent conditions on each branch circuit, helping prevent insulation damage and fire risk.\u003c\/p\u003e \u003ch3\u003eWhat makes it unique\u003c\/h3\u003e\n\u003cp\u003eUnlike generic substitutes, the Q2125B is built to Siemens specifications, offering precise trip curves and coordination within Siemens panel ecosystems. The molded case construction provides durability in demanding environments, while the 240V, 2-pole design supports common 240V circuits such as HVAC equipment, water heaters, and large lighting or receptacle runs.\u003c\/p\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\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 Q2125B\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 Plug-in\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\u003ePro tips for installation: verify the panelboard compatibility with the Siemens Q2125B, ensure the same voltage and amperage rating, and follow all safety procedures during service. When replacing an older breaker, confirm that the trip curve matches the protection requirements of the circuit and that neutral\/grounding conductors are correctly terminated.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355154698402,"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_d01f9db2-8208-4587-bb53-322965674e87.png?v=1764689698","url":"https:\/\/www.ampstate.com\/products\/siemens-q2125b-125a-240v-2-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}