The WAGO 2042 series replacement plug-in relay is designed for railway applications and features a green LED indicator. It is a single-pole (1P) relay with a control voltage range of 16.8-30Vdc (nominally 24Vdc) and operates within 0.7 to 1.25 times the control voltage. The relay is an electromechanical type with a normally closed (1NC/SPST-NC) contact configuration, capable of handling a continuous rated current of 6A. It includes push-in connections for easy installation, supports plug-in mounting, and has an IP20 protection rating. The contacts are made of Silver-Tin (AgSnO) material, and it is equivalent to the model 20423054.