The Bourns® SRN Inductors are designed using semi-magnetic shielding technology. Instead of the conventional ferrite shield, the magnetic shield of the Model SRN Series utilizes an epoxy-ferrite powder mixture resin.
This compound is applied to the perimeter of the inductor which completely envelops the winding. As a result, the Model SRN Series Inductors provide effective magnetic shielding while emitting lower radiation compared to non-shielded inductors. In addition, the models offer moderate cost savings to comparably-sized conventional ferrite shield inductors.