Arc Fault Detection A-Type RCBO – WFD140B-030 (40A, B Curve, 30mA) 4 & 5 pole MCBs (&Shunt Trip) and overload protection in one

and overload protection in one compact device

Dual-handle trip indication – black handle trips on overload/short

and other larger installations where multiple three-phase circuits need to be distributed from one main board

the enclosure includes DIN rail mounting and an earth bar

The C curve prevents nuisance tripping while maintaining full circuit protection

Arc Fault Detection A-Type RCBO – WFD140B-030 (40A, B Curve, 30mA) 4 & 5 pole MCBs (&Shunt Trip) and overload protection in oneThe WFD140B 030 is a 40A, B Curve Arc Fault Detection (AFDD) RCBO, designed to deliver maximum protection against arc faults, earth leakage, overload, and short circuits in one compact unit. Built to BS 7671: 2018 (18th Edition) standards, it provides fire safe reliability for high load domestic and commercial circuits. Unlike a standard RCBO, this device features microprocessor driven arc fault detection that constantly monitors electrical waveforms.