The 5VA40-13 from ACST GmbH is a RF Schottky Diode with Frequency Up to 350 GHz, Peak Reverse Voltage 39 to 42 V (Breakdown Voltage), Forward continuous Current 1 uA, Forward Voltage 1.90 to 1.98 V, Capacitance 13 to 16 fF. Tags: Chip. More details for 5VA40-13 can be seen below.