The PTCTNMTNF09S from NexTek, LLC. is a RF Surge Protector with Frequency DC to 2.5 GHz, Input Power 37 W, Insertion Loss 0.15 dB, Operating Current 7.5 A (Through), Operating Temperature -40 to 90 Degree C. Tags: Gas Discharge Tube. More details for PTCTNMTNF09S can be seen below.