The TP-ESP-100-POE24 is a low cost 100Mbps Network POE Lightning/Surge 5KA protector to help protect equipment from surges due to lightning and grid power fluctuations. It is POE Compatible. It protects all 8 CAT5 pins with 7.5V clamp voltage on the data wires and 46V clamp voltage on the POE power wires. It has an all metal case and shielded RJ45 connectors for EMI suppression. There are 2 integral mounting feet and a separate 16AWG ground wire.
For more details on this protector please take a look at the spec sheet.