The PE8037 from Pasternack Enterprises Inc is a Limiter with Frequency 8 to 16 GHz, Flat Leakage 0.01 W, Flat Leakage 12 dBm, Peak Flat Leakage 20 dBm, Peak Flat Leakage 0.1 W. Tags: Module with Connectors, PIN-Schottky Diode. More details for PE8037 can be seen below.