The PTR7AM7AF14K1 from NexTek, LLC. is a RF Surge Protector with Frequency DC to 1 GHz, Input Power 8000 W, Insertion Loss 0.1 to 0.2 dB, Operating Temperature -40 to 90 Degree C, Operating Voltage 1400 V. Tags: Gas Discharge Tube. More details for PTR7AM7AF14K1 can be seen below.