This design is intended to show how our basic technology building block models can be combined to represent the essential physics and electrical behavior of a more complex component. In this case, an electro-magnet and simple mechanical elements are used, together with an ideal electrical switch and some technology converter blocks, to model an electro-mechanical relay.

When the relay is energized and closes, the lamp lights up! You can even see contact bounce in the armature position waveform (green waveform), and its impact on the lamp inrush current transient (blue waveform).