www.vishay.com CS3D, CS3G, CS3J, CS3K, CS3M Visha.
CS3D - Surface Mount Glass Passivated Rectifier
PCS3D11 - Power Chip Shielded Inductors
PCS3D12 - Power Chip Shielded Inductors
PCS3D16 - Power Chip Shielded Inductors
DCS3D20 - SMT Directional Couplers