The PE8031 from Pasternack Enterprises Inc is a Limiter with Frequency 2 to 4 GHz, Flat Leakage 0.02 W, Flat Leakage 14 dBm, Input Power 30 dBm, Input Power 1 W. Tags: Module with Connectors, PIN-Schottky Diode. More details for PE8031 can be seen below.