The MAP-252S from M-pulse Microwave is a RF Schottky Diode with Forward continuous Current 1 mA, Forward Voltage 0.3 to 0.4 V, Power Dissipation 100 mW, Capacitance 0.3 - 0.5 pF, Operating Temperature -65 to +150 Degrees C. More details for MAP-252S can be seen below.