The ACLM4809F from Cobham Signal & Control Solutions is a Limiter with Frequency 18 to 26.5 GHz, CW Flat Leakage 15 dBm, CW Flat Leakage 0.03 W, Flat Leakage 0.03 W, Flat Leakage 15 dBm. Tags: Module with Connectors, PIN Diode. More details for ACLM4809F can be seen below.