Plain-language answer: An RF surge protector diverts part of a transient from a feed or control line toward the bonded grounding system.
Why it matters
It can reduce damage from induced surges, but its clamping technology, frequency range, power rating, installation inductance, and ground path determine performance.
Use it correctly
Mount it at the protected entry, bond it with a short low-impedance path, coordinate it with other services, inspect it, and replace sacrificial elements as required.
The common mistake
Installing an arrestor on coax with no effective bonded path for surge current.
Decision boundary
Current regulation, program rules, manufacturer limits, exact station configuration, and live observations control. Recheck changing rules, solar conditions, and operating status before acting.
