Index of Electronic Circuit Components

Introduction

This page is an alphabetical list of electronics components with their common circuit symbols. The headings with links lead to more detailed tutorial documents on those components. The unlinked headings are of very simple devices that are included only to illustrate their circuit symbols.

The descriptive documents will often refer to a component as either a passive or an active device. Passive components, such as resistors and capacitors, are generally two-terminal devices that have no external power source. Active devices, such as transistors, have more than two terminals and have are externally powered so that the device output can be amplified compared to an input.

Capacitors

Diodes

Fuses

Note: the SB in the example means "slow blow"

Ground or earth

Note: multiple ground symbols in a circuit imply that they are connected to a common ground.

Lamps

Inductors

Meters

Note: The voltmeter is used in parallel to measure the potential difference between two points and the ammeter is used in series to measure the current through a point.