Based on this product's specifications, here are some alternatives and similar models
Surge protector Lancom 61257 for Ethernet/LAN connections, model AirLancer 61257
Summary description:
Surge protector AirLancer 61257 by Lancom is designed to protect Ethernet/LAN network equipment from voltage spikes and transient surges. It connects inline with network cabling to reduce risk to routers, switches and access points. Suitable for network installations where surge protection is needed to improve equipment reliability and reduce downtime.