The LP18-40A from Herotek is a Limiter with Frequency 18 to 40 GHz, Flat Leakage 0.079 W, Flat Leakage 19 dBm, CW Input Power 1 W, CW Input Power 30 dBm. Tags: Module with Connectors, Module with Connectors, Surface Mount, PIN Diode. More details for LP18-40A can be seen below.