The SDS120J040G2 from Sanan IC is a RF Schottky Diode with Peak Reverse Voltage 1200 V (Surge Peak), Forward continuous Current 20000 to 98000 mA, Forward Voltage 1.45 to 2.70 V, Current Surge Peak 180 A (Non-Repetitive), Current 2 to 300 uA (Reverse). Tags: Surface Mount, Schottky Barrier Diode (SBD). More details for SDS120J040G2 can be seen below.