Combined surge protection for RF systems, tested in categories D, C, B (EN 61643), suitable for coaxial cables at frequencies between 0 and 2.7 GHz and for DC applications. Suitable for RF systems with a power of up to 1.9 kW. For use at limits from LPZ 0 for protection against flashover (typically at the point of cable entry) up to LPZ 3 to protect sensitive electronic equipment.