The product has a special system for short-circuit protection and over-voltage protection. An automatic fuse with delayed action that does not require replacement is an excellent protection.A high-quality varistor with a fast operating time of less than 25 nanoseconds and a high value of the absorbed 6000A pulse, protects the device against dangerous voltage peaks.R5 does not take up much space and, combined with the possibility of mounting to the ground, is a universal product with a wide range of applications.It protects electronic devices at home and in the office against short circuits as well as dangerous voltage spikes.