Active Electronic Component

Tim Ziegler

Active components require electrical power in order to operate and can usually add current into a circuit. Transistors are an example of an active component – transistors take a small current as an input that then either switch on another larger current or amplify their starting current.

By contrast, passive electronic components consume energy but do not produce it. For example, a resistor in a circuit sits the circuit and adds resistance to restrict current flow to a certain level or stop it altogether.