The PTCTNFMMF09S from NexTek, LLC. is a RF Surge Protector with Frequency DC to 6 GHz, Input Power 37 to 240 W, Insertion Loss 0.1 to 0.3 dB, Operating Temperature -55 to 85 Degree C, Operating Voltage 58 V. Tags: Gas Discharge Tube. More details for PTCTNFMMF09S can be seen below.