The 4-pole auxiliary relays are used for switching auxiliary and control circuits (forced-guided contacts available). They feature an electronic coil interface that can accommodate a very wide control voltage range, allowing them to handle significant voltage fluctuations. They come with built-in overvoltage protection and do not require additional suppression components. Additionally, a wide range of accessories is available. For types with coil code -20, the connection polarity (A1+ / A2-) must be observed.