Yes, surge protectors have a limited lifespan and should be replaced periodically. While surge protectors continue to provide basic power functionality even after their protection capability diminishes, it is important to replace them to maintain optimal protection. Most surge protectors come with an indicator light that signals when the protection capabilities have been exhausted or compromised. It is recommended to replace surge protectors every 2 to 5 years, or sooner if they have experienced a significant surge event.