The VHF50D-MA-PGR from PolyPhaser is a RF Surge Protector with Frequency 100 to 512 MHz, Input Power 750 W, Insertion Loss 0.1 dB, Operating Temperature -50 to 85 Degree C, Surge Current 20 kA. Tags: Filter. More details for VHF50D-MA-PGR can be seen below.