{"product_id":"siemens-mbk125-main-breaker-kit-responsive-support","title":"MBK125 | Siemens 125A 120\/240V 2-Pole Main Breaker Kit for 1-Phase Liquid-Cooled Systems","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"451\" data-start=\"0\"\u003eThe Siemens MBK125 is a 125-amp main circuit breaker kit designed for 1-phase liquid-cooled electrical systems operating at 120\/240 VAC. This two-pole unit supports up to 70 kW of system power while providing reliable overcurrent protection with a 22 kA interrupt rating. Built with a durable aluminum housing, the MBK125 is suited for residential, commercial, and specialty installations requiring high-capacity main disconnect capability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCircuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMBK125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMolded Case Circuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1-Phase Liquid Cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\/240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmperage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Poles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterrupt Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22 kA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48 in L × 37 in W × 97 in H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMain breaker kit for liquid-cooled electrical systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About MBK125 \u003c\/h4\u003e\n\u003cp class=\"\" data-end=\"1074\" data-start=\"590\"\u003eThe MBK125 belongs to Siemens’ family of main breaker kits engineered for integration into liquid-cooled power distribution equipment. Designed for single-phase systems, its two-pole configuration ensures balanced handling of 120\/240-volt loads commonly found in residential and light commercial applications. The breaker’s 22 kA interrupt rating supports safe clearing of high fault currents, while its 70 kW power capacity enables the unit to serve demanding electrical loads. Constructed with an aluminum enclosure and delivered in a large-format assembly, the MBK125 offers long-term durability and installation flexibility across diverse application environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"1102\" data-start=\"1085\"\u003eKey Features:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e125A, 120\/240V rating: Supports high-capacity single-phase electrical systems.\u003c\/li\u003e\n\u003cli\u003eDesigned for liquid-cooled applications: Suitable for specialized cooling-integrated power equipment.\u003c\/li\u003e\n\u003cli\u003e2-pole configuration: Provides complete main disconnect capability for 1-phase systems.\u003c\/li\u003e\n\u003cli\u003e22 kA interrupt rating: Ensures dependable short-circuit protection.\u003c\/li\u003e\n\u003cli\u003e70 kW power capability: Supports large residential or commercial load demands.\u003c\/li\u003e\n\u003cli\u003eAluminum housing: Offers lightweight durability and corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eLarge installation footprint: 48 in L × 37 in W × 97 in H for compatibility with major system enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe MBK125 delivers the reliability and precision required for main breaker protection in liquid-cooled power distribution systems.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":48493937852714,"sku":"MBK125","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/MBK125.webp?v=1716304739","url":"https:\/\/iqelectro.com\/products\/siemens-mbk125-main-breaker-kit-responsive-support","provider":"IQElectro","version":"1.0","type":"link"}