The MLD5118 from Massachusetts Bay Technologies is a Limiter Diode with Frequency Range 100 MHz to 20 GHz, CW Input Power 5 W, Input Peak Power 60 dBm, Insertion Loss 0.1 dB, Capacitance 0.15 to 0.2 pF. Tags: Chip. More details for MLD5118 can be seen below.