APC ProtectNet Dataline Surge Suppressor: * SurgeArrest components such as MOVs and Thermal fuse ensure instantaneous reaction to lightning strikes and wiring faults * Protection of data lines (Ethernet, coaxial and phone) * Once the circuit of an APC SurgeArrest has been compromised, the unit disconnects equipment from the power supply ensuring that no damaging surges reach your equipment * Prevent damage to your equipment from power surges and spikes