The PTRONF7AF23S from NexTek, LLC. is a RF Surge Protector with Frequency DC to 2.2 GHz, Input Power 240 W, Insertion Loss 0.15 dB, Operating Current 10 A, Operating Temperature -40 to 90 Degree C. Tags: Gas Discharge Tube. More details for PTRONF7AF23S can be seen below.