The SDS065J004C3 from Sanan IC is a RF Schottky Diode with Peak Reverse Voltage 650 V, Forward continuous Current 4000 mA, Forward Voltage 1.35 to 1.55 V, Current Surge Peak 34 A (Non-Repetitive), Current 12 uA (Reverse). Tags: Schottky Barrier Diode (SBD). More details for SDS065J004C3 can be seen below.