The PHOENIX CONTACT part 2859987 is a device protection unit designed for 1-phase power supply networks with separate N and PE (3-conductor system: L1 - N - PE). It is classified as type 3/class III device protection and comes equipped with a network interference suppression filter to prevent high-frequency interference voltages. Additionally, this unit features a remote indication contact for added convenience and monitoring. With its advanced features, the PHOENIX CONTACT part 2859987 offers reliable protection for your electrical systems.