The ACLM4637 from Cobham Signal & Control Solutions is a Limiter with Frequency 100 MHz to 4 GHz, Flat Leakage 0.08 W, Flat Leakage 19 dBm, Peak Flat Leakage 20 dBm, Peak Flat Leakage 0.1 W. Tags: Module with Connectors, PIN Diode. More details for ACLM4637 can be seen below.