The PTRT7FT7F09S from NexTek, LLC. is a RF Surge Protector with Frequency DC to 750 MHz, Input Power 37 to 1600 W, Insertion Loss 0.1 to 0.14 dB, Operating Temperature -40 to 90 Degree C, Surge Current 40 kA. Tags: Gas Discharge Tube. More details for PTRT7FT7F09S can be seen below.