SMRF 5025S shielded inductors

Gowanda Electronics has announced a series of surface mount inductors - SMRF 5025S - which has high performance shielding designed into the inductor, allowing electronic components to be mounted closer together on circuit boards in RF applications.

This shielded series is targeted for RF applications where coupling between board components is a concern due to board density. Applications for this series include ali RF signal circuitry in communications equipment, test and measurement equipment, medical diagnostic equipment and industrial process control equipment.

The electromagnetic shielding is accomplished by placing a sleeve of magnetic material directly over the coil winding. Gowanda's manufacturing process enhances the centring of the magnetic shield which results in consistent, minimum coupling from part to part.

This tends to provide a more effective magnetic closed gap compared with the distributed gap materials incorporated in moulding compounds.

The process provides shielding with typically less than 2% coupling vs distributed gap materials which provide 3% to 5% coupling.

As with its other inductors, the company uses a semiconductor grade moulding material and high temperature solder on the internal connection.

Technical specifications include: inductance from 0.10 to 10,000 µH and incremental current ratings from 3900 to 54 mA DC (based on a 35°C temperature rise at ambient temperature of 90°C).