Coax surge protectors provide an inline connection that helps divert excess electrical energy from the coaxial cable to ground before it reaches connected equipment. They also maintain the cable’s signal path, with many models supporting satellite pass-through voltage and low signal attenuation.

Match the surge protector’s impedance to the coaxial cable system, choosing 75 ohms for 75-ohm runs and 50 ohms for 50-ohm runs. Select connector types that match the installation, such as F connectors for 75-ohm coax and N connectors for 50-ohm applications, while confirming the required connector gender.

Install coax surge protectors inline with the coaxial cable near the building entry point, using compatible connectors and keeping the protected cable run on the equipment side. For outdoor applications, use a weather-resistant protector and bond its grounding connection to the building’s grounding electrode system with a short, direct path that follows local electrical codes.

Compare signal attenuation by looking for a lower value, which indicates less signal loss through the protector; the assortment includes coax options rated below 1 dB, as well as an in-line option rated below 0.2 dB. Choose a frequency range that covers the signals in your system, and select a protector with pass-through voltage when the installation uses satellite equipment that requires voltage on the coax line.