WEG RWB40E-3-A4U040 Overload Relay

The WEG RWB40E-3-A4U008 electronic overload relay provides adjustable motor overload and phase-failure protection for three-phase motors in industrial control systems. It is designed for direct mounting on compatible WEG contactors and motor starters, delivering reliable protection in demanding environments such as manufacturing facilities, conveyor systems, pumping stations, HVAC equipment, and industrial control panels. With an adjustable current range of 8-40 A and a 3-pole configuration, it performs electronic thermal overload protection and monitors phase loss and current unbalance to prevent motor damage during inrush, stall, or unbalanced loading. Key specs include a 690 V rated insulation voltage, 50/60 Hz operation, Class 10 trip, and a 1 NO + 1 NC auxiliary contact, plus manual/automatic reset and direct-mount compatibility with WEG CWB/CWM contactor series.