The PTRONF7AF60S from NexTek, LLC. is a RF Surge Protector with Frequency DC to 2.2 GHz, Input Power 37 to 4500 W, Insertion Loss 0.15 dB, Operating Temperature -40 to 90 Degree C, Surge Current 50 kA. Tags: Gas Discharge Tube. More details for PTRONF7AF60S can be seen below.