{"product_id":"siemens-mbk150-transfer-switch-main-breaker-trusted-supplier","title":"MBK150 | Siemens 150A Type SL transfer switch main breaker with EQ frame and NEMA 3R enclosure","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"0\" data-end=\"451\"\u003eThe Siemens MBK150 is a main circuit breaker designed for integration with Type SL transfer switches, providing dependable electrical protection and distribution. The part number MBK150 operates at 120\/240 VAC with a 150 A rating and utilizes a thermal magnetic trip mechanism for reliable overcurrent response. Its NEMA 3R steel enclosure and bolt-on mounting make it suitable for both indoor and outdoor installations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 99.9744%; height: 431.215px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 39.2014px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 39.2014px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 39.2014px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eCircuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eMBK150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eMolded Case Circuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eType SL Transfer Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eMBK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e120\/240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eAmperage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e150 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eInterrupt Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e22 kA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eFrame\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eEQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eTrip Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eThermal Magnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eNumber of Poles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003ePhase\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eEnclosure Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eNEMA 3R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eBolt-On\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 19.6007px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 19.6007px;\"\u003e10 in L × 22 in W × 25 in H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2014px;\"\u003e\n\u003ctd style=\"width: 47.963%; height: 39.2014px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3946%; height: 39.2014px;\"\u003eMain breaker for Type SL transfer switches\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 MBK150\u003c\/h4\u003e\n\u003cp data-start=\"590\" data-end=\"1074\" class=\"\"\u003eThe MBK150 is a Siemens main breaker assembly engineered for use within the MBK series of Type SL transfer switch systems. Built on the EQ frame platform, it features a durable steel construction designed to withstand demanding installation environments. The device integrates seamlessly with compatible Siemens transfer switches, offering straightforward bolt-on mounting for secure mechanical and electrical connectivity. It is commonly used in power distribution systems requiring a main disconnect with thermal magnetic trip protection for residential, commercial, and light industrial applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003eKey Features:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e150 A rating: Supports moderate-load distribution in transfer switch systems.\u003c\/li\u003e\n\u003cli\u003eThermal magnetic trip: Provides overload and short-circuit protection in a single device.\u003c\/li\u003e\n\u003cli\u003e22 kA interrupt rating: Handles high fault levels for enhanced electrical safety.\u003c\/li\u003e\n\u003cli\u003eEQ frame construction: Ensures compatibility with Siemens Type SL transfer equipment.\u003c\/li\u003e\n\u003cli\u003eNEMA 3R enclosure: Suitable for outdoor or exposed installations requiring weather resistance.\u003c\/li\u003e\n\u003cli\u003eBolt-on mounting: Allows secure installation and reliable mechanical fastening.\u003c\/li\u003e\n\u003cli\u003eDurable steel build: Withstands wear and environmental exposure for long-term operation.\u003c\/li\u003e\n\u003cli\u003eCompact dimensions: Sized at 10\" × 22\" × 25\" for integration into various switch assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe MBK150 delivers the reliability and precision required for main breaker functionality in transfer switch applications.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":48738653700394,"sku":"MBK150","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/MBK150.webp?v=1718719660","url":"https:\/\/iqelectro.com\/products\/siemens-mbk150-transfer-switch-main-breaker-trusted-supplier","provider":"IQElectro","version":"1.0","type":"link"}