The MSS39,148-B10B from Cobham Metelics is a RF Schottky Diode with Frequency 20 GHz, Peak Reverse Voltage 3.5 V, Forward continuous Current 50 mA, Forward Voltage 0.38 to 0.48 V, Current 50 mA. Tags: Surface Mount, P Type. More details for MSS39,148-B10B can be seen below.