MSD Low DCR Coupled Inductors Coilcraft MSD Low DCR Coupled Inductors provide a wide range of inductance values, high efficiency, and excellent current handling. The inductors can be used as two single inductors connected in series or parallel or as common mode chokes with some also suitable for wideband or 1:1 transformers. Coilcraft MSD inductors are ideal for use in a variety of circuits including flyback, multi-output buck, and SEPIC.