The MLD5119 from Massachusetts Bay Technologies is a Limiter Diode with Frequency Range 100 MHz to 20 GHz, CW Input Power 10 W, Input Peak Power 63 dBm, Insertion Loss 0.2 dB, Capacitance 0.3 to 0.6 pF. Tags: Chip. More details for MLD5119 can be seen below.