WEG RWB40E-3-A4U008 Electronic Overload Relay 1.6-8A 3-Pole Class 10/20/30

The WEG RWB40E-3-A4U008 is a 3-pole electronic overload relay with a wide 1.6–8A current adjustment range and selectable trip class (10, 20, or 30), designed for direct mounting to WEG CWB series contactors. Engineered for low-voltage three-phase electric motor protection in 50/60 Hz sinusoidal networks, it delivers increased reliability, lower power dissipation, and easier maintenance management than traditional thermal overload relays. Both automatic and manual reset modes are supported, offering flexibility for different applications.
 
Key Specifications
Current Adjustment Range: 1.6–8A
Poles: 3
Type: Electronic
Trip Classes: 10, 20, 30 (selectable)
Reset: Automatic / Manual
Mounting: Direct (to CWB series contactors)
Maximum Insulation Voltage (Ui): 690V
Network: 50/60 Hz sinusoidal three-phase
Application: Low-voltage motor protection
 
Ideal for motor starter assemblies in pumps, fans, compressors, conveyors, and general industrial machinery where electronic precision, low power dissipation, selectable trip class, and reliable long-term protection are required. A modern upgrade over traditional thermal overload relays.