Diamond Original SP1000 DC-1000MHz Coax Surge Protector / Lightning Arrester - Connectors: UHF Female (SO-239) to UHF Female (SO-239) Coaxial Lightning Arrester, SP-Series, DC Pass Type, 400W, PEP RF Power Rating, UHF Female Impulse Wave Discharge: 1000v. Impulse Wave Discharge Capacity: 6000A. The Diamond SP series of coax surge protectors offer wideband capability with extremely low loss. They boast an insertion loss of less than 0.3 dB. They have an impulse wave discharge capacity of 6000 Amps. Insulating resistance DC 100 V is over 10,000M ohms. Both feature a replaceable surge arrester element. These arresters are vailable with several coaxial connection schemes and with multiple RF power ratings. They're designed to pass DC current, so you can install these arresters in-line with external devices requiring coaxial DC power-feed. Then, when the thunder-boomers approach, you can sit back, relax, and let these Diamond Antenna SP-Series Lightning Arresters take the hit for you!