BUY D1FS4 https://www.utsource.net/itm/p/11281664.html
D1FS4 SBD Schottky Barrier Diodes 40V 1.1A 550mV/0.55V SMA/DO-214AC marking S4 low forward voltage
Description: Diode, Fast Recovery, Single, 4A, 200V Features: Low forward voltage drop High surge current capability High reliability Low reverse leakage current High temperature soldering guaranteed: 260°C/10 seconds at terminals Applications: Switching power supplies Automotive applications General rectification (For reference only)