The DUB01CB23500V is a true RMS monitoring relay designed for single-phase applications, featuring voltage detection capabilities for both over and under voltage conditions. It operates within a measuring range of 2 to 500V AC/DC, with a power supply requirement of 115/230VAC. The relay provides 1 SPDT output and is housed in a compact 22.5x83.5x99.5mm enclosure rated IP20, suitable for DIN rail mounting.