{"product_id":"abb-mb331wb-main-breaker-kit-400a-3-pole-65kaic","title":"Abb mb331wb Main Breaker Kit 400A 3-pole 65kaic","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ABB mb331wb is a main breaker kit rated for 400 amps at 240 volts AC and 208Y\/120 volts AC, designed for use with AQU1 and AQU3 panelboards. The kit includes a breaker and provides a 3-pole main disconnect solution with an interrupting rating of 65 kAIC. It serves as the primary overcurrent protection device at the service entrance of a panelboard, isolating all downstream branch circuits when tripped or manually switched off. Licensed electricians install this component as part of new panelboard builds or service upgrades where a main breaker is required by code.\u003c\/p\u003e\n\u003cp\u003eThis kit is suited for commercial and light industrial electrical distribution applications where a 400-amp, 3-pole main breaker is required. It is compatible with AQU1 and AQU3 series panelboards and supports both 208Y\/120-volt three-phase and 240-volt AC systems. It is appropriate for use in multi-tenant commercial buildings, industrial facilities, and other installations requiring high-capacity service entrance protection.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e400-amp continuous current rating for high-capacity service entrance applications\u003c\/li\u003e\n  \u003cli\u003e3-pole configuration supports three-phase distribution systems\u003c\/li\u003e\n  \u003cli\u003eDual voltage rating: 240 volts AC and 208Y\/120 volts AC\u003c\/li\u003e\n  \u003cli\u003e65 kAIC interrupting rating for use in high fault-current environments\u003c\/li\u003e\n  \u003cli\u003eIncludes breaker — complete kit ready for panelboard installation\u003c\/li\u003e\n  \u003cli\u003eDesigned for AQU1 and AQU3 series panelboards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with ABB AQU1 and AQU3 series panelboards operating at 240 volts AC or 208Y\/120 volts AC.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the utility service before beginning any panelboard work. Verify the panelboard bus rating and service entrance conductors are rated to match the 400-amp breaker before installation. Do not exceed the 65 kAIC interrupting rating of the breaker for the available fault current at the point of installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 240 volts AC \/ 208Y\/120 volts AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupting Rating\u003c\/strong\u003e: 65 kAIC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Panelboards\u003c\/strong\u003e: AQU1, AQU3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ABB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: mb331wb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":51669029421362,"sku":"MB331WB","price":1539.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7f7c203249e823fcbb769b1054125537.jpg?v=1787955695","url":"https:\/\/voomisupply.com\/products\/abb-mb331wb-main-breaker-kit-400a-3-pole-65kaic","provider":"Voomi Supply","version":"1.0","type":"link"}