The SDS120J040H2 from Sanan IC is a RF Schottky Diode with Peak Reverse Voltage 1200 V (Surge Peak), Forward continuous Current 40000 to 90000 mA, Forward Voltage 1.50 to 2.70 V, Current Surge Peak 320 A (Non-Repetitive), Current 2 to 600 uA (Reverse). Tags: Surface Mount, Schottky Barrier Diode (SBD). More details for SDS120J040H2 can be seen below.