Fast switching

Slow switching

Packet switching

Medium switching

Supply power to loads

To increase load current

To decrease load current

To protect the load from arcing

To minimize eddy current losses

To increase the hysteresis losses

To maximize eddy current losses

To increase core saturation losses

Hinges

Relay coil

Relay contacts

Frame and core

LC filter

RC filter

Inductor Input filter

Capacitor Input filter