{"product_id":"abb-bmfw463-ac300-4p-63a-300ma-rccb","title":"ABB BMFW463\/AC300 Residual Current Circuit Breaker AC Type, 4P, 63A, 300mA","description":"\u003ch2\u003eABB BMFW463\/AC300 4-Pole 63A 300mA RCCB\u003c\/h2\u003e\n\u003cp\u003eThe BMFW463\/AC300 is a 4-pole 63A residual current circuit breaker (RCCB) with a 300mA AC-type sensitivity from ABB's Formula DIN Rail range. It protects people and installations against earth fault currents and is manufactured to IEC standards, making it well suited to higher-load three-phase distribution boards across UAE residential, commercial, and light industrial installations.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4-pole configuration for three-phase and neutral circuit protection against earth leakage faults\u003c\/li\u003e\n  \u003cli\u003e63A rated current supports higher-load distribution circuits than smaller-frame RCCBs in the same series\u003c\/li\u003e\n  \u003cli\u003e300mA AC-type sensitivity suitable for general protection against fault currents in standard distribution circuits\u003c\/li\u003e\n  \u003cli\u003eIP20 degree of protection with an operating temperature range of -25°C to +55°C, suited to UAE ambient conditions\u003c\/li\u003e\n  \u003cli\u003eGenuine ABB Formula Din Rail quality — rated for 10,000 electrical and mechanical operating cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eBMFW463\/AC300\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eRCCB (ELCB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePoles\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Current (In)\u003c\/td\u003e\n\u003ctd\u003e63A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e300mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput Voltage Type\u003c\/td\u003e\n\u003ctd\u003eAC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Voltage (Ur)\u003c\/td\u003e\n\u003ctd\u003e230\/400V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Impulse Withstand Voltage (Uimp)\u003c\/td\u003e\n\u003ctd\u003e4kV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Frequency\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDegree of Protection\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnecting Capacity\u003c\/td\u003e\n\u003ctd\u003eFlexible 35mm² \/ Solid 25mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElectrical \u0026amp; Mechanical Endurance\u003c\/td\u003e\n\u003ctd\u003e10,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAmbient Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEarth fault protection for higher-capacity three-phase distribution boards in villas and commercial buildings\u003c\/li\u003e\n  \u003cli\u003eMain incomer protection for sub-distribution boards in FM-managed facilities\u003c\/li\u003e\n  \u003cli\u003eFault current protection for HVAC, chiller, and pump motor circuits in commercial installations\u003c\/li\u003e\n  \u003cli\u003eGeneral earth leakage protection in retail, warehouse, and light industrial panels across the UAE\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat's the difference between an MCB and an RCCB\/RCD?\u003c\/strong\u003e\u003cbr\u003eAn MCB protects circuits and wiring against overload and short-circuit current. An RCCB like this one protects against earth leakage by monitoring current imbalance and disconnecting the circuit — the two are complementary and are normally installed together in a distribution board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat does the 300mA sensitivity rating mean?\u003c\/strong\u003e\u003cbr\u003e300mA RCCBs are sized for fire and equipment protection on larger circuits and sub-mains, not personal shock protection — that requires a 30mA device. A 300mA unit is a common choice as a main incomer or sub-distribution protection device upstream of 30mA final-circuit RCDs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow many poles do I need?\u003c\/strong\u003e\u003cbr\u003eA 4-pole (4P) RCCB switches all three phases plus neutral together. Use 4P for three-phase supplies or distribution boards where the neutral must also be isolated; 2-pole devices are used for single-phase circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan this be used alongside MCBs in the same board?\u003c\/strong\u003e\u003cbr\u003eYes. This RCCB is typically installed upstream of the MCBs it protects, on the same DIN rail, so a leakage fault trips the RCCB while overloads\/short circuits are still cleared by the individual MCBs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I install this myself?\u003c\/strong\u003e\u003cbr\u003eNo. RCCBs are wired into a live distribution board and must be installed by a licensed electrician in line with UAE wiring regulations.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44352345702499,"sku":"1SYF604062R3630","price":251.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/6570\/1475\/files\/9PAA00000216761_400x400_aa9d06fe-3c62-4982-a929-80ea9c6780d0.png?v=1787498885","url":"https:\/\/www.deluxeuae.com\/products\/abb-bmfw463-ac300-4p-63a-300ma-rccb","provider":"Deluxe Electricals","version":"1.0","type":"link"}