The STL411 from Crane Aerospace & Electronics is a Limiter with Frequency 2 to 4 GHz, CW Flat Leakage 17 dBm, CW Flat Leakage 0.05 W, Flat Leakage 0.05 W, Flat Leakage 17 dBm. Tags: Module with Connectors, Surface Mount. More details for STL411 can be seen below.