The MLD5116 from Massachusetts Bay Technologies is a Limiter Diode with Frequency Range 100 MHz to 20 GHz, CW Input Power 4 W, Input Peak Power 56 dBm, Insertion Loss 0.2 dB, Capacitance 0.3 to 0.5 pF. Tags: Chip. More details for MLD5116 can be seen below.