Electrical Symbols Chart — Complete Guide with Meanings & Copy Paste

Published May 7, 2026

Whether you are studying electronics, reading a wiring diagram, or trying to understand a circuit schematic, electrical symbols are the language you need to know. These standardized symbols represent components like resistors, capacitors, switches, and power sources in a universal format that engineers and electricians around the world can read.

In this guide, we will walk through the most common electrical symbols, explain what each one means, and show you the Unicode characters you can copy and paste for your own diagrams, presentations, or documents.

Why Electrical Symbols Matter

Imagine trying to draw a realistic picture of every wire, battery, and resistor in a circuit. It would be a mess. Electrical symbols solve this problem by giving every component a simple, standardized representation. The International Electrotechnical Commission (IEC) and the American National Standards Institute (ANSI) maintain these standards so a schematic drawn in Tokyo reads the same as one drawn in New York.

If you work with circuit diagrams regularly, memorizing these symbols will save you hours of confusion. Let us break them down.

Basic Electrical Components

Resistor Symbol

The resistor is one of the most fundamental components in electronics. It limits the flow of electrical current in a circuit. In IEC standards, it is drawn as a rectangle. In ANSI standards, it appears as a zigzag line. The unit of resistance is the Ohm, represented by the Greek letter Omega.

Capacitor Symbol

A capacitor stores electrical energy temporarily. In schematics, it is represented by two parallel lines (or one curved line for polarized capacitors). The unit is the Farad (F), but you will usually see values in microfarads.

Inductor Symbol

An inductor stores energy in a magnetic field. It appears as a series of loops or coils in circuit diagrams. Inductors are measured in Henrys (H) and are commonly found in filters, transformers, and power supplies.

Power Source Symbols

Battery Symbol

The battery symbol shows one or more pairs of parallel lines (one long, one short) representing cells. A single pair is one cell, while multiple pairs indicate a multi-cell battery. The long line represents the positive terminal.

Ground (Earth) Symbol

The ground symbol is one of the most important in any schematic. It represents the reference point of zero voltage. There are several types: earth ground (a horizontal line with descending lines below), chassis ground (connected to the equipment frame), and signal ground (for circuit reference).

Switch and Relay Symbols

Switches control the flow of current in a circuit. A simple single-pole single-throw (SPST) switch is shown as a line with a movable contact. More complex switches like DPDT (double-pole double-throw) have multiple contacts shown in the diagram.

Common Switch Types

• SPST — Single Pole, Single Throw (simple on/off)
• SPDT — Single Pole, Double Throw (one input, two outputs)
• DPST — Double Pole, Single Throw (two circuits, one switch)
• DPDT — Double Pole, Double Throw (two circuits, two directions)
• Push-button — Momentary contact, normally open or closed

Semiconductor Symbols

Semiconductors are the building blocks of modern electronics. Here are the key symbols you will encounter:

Diode

A diode allows current to flow in only one direction. Its symbol is a triangle pointing toward a line. The triangle represents the anode and the line represents the cathode. Special types include Zener diodes, LEDs (light-emitting diodes), and Schottky diodes.

Transistor

Transistors amplify or switch electronic signals. The two main types are BJT (Bipolar Junction Transistor) and FET (Field Effect Transistor). BJTs come in NPN and PNP varieties, each with a distinct schematic symbol showing the emitter, base, and collector connections.

Electrical Symbol Quick Reference Chart

Here is a handy collection of electrical-related Unicode symbols you can copy and paste:

Measurement Unit Symbols

Every electrical measurement has a standard unit with its own symbol. Here are the ones you will see most often:

• V — Volt (voltage/electrical pressure)
• A — Ampere (current flow)
• Ω — Ohm (resistance)
• W — Watt (power)
• F — Farad (capacitance)
• H — Henry (inductance)
• Hz — Hertz (frequency)
• S — Siemens (conductance)

Reading Electrical Schematics

A schematic is like a map of an electrical circuit. Here are some tips for reading them effectively:

• Follow the current flow from the power source through each component
• Identify ground symbols — they show the return path for current
• Look for node dots where wires connect (no dot means no connection)
• Pay attention to component values written next to each symbol
• Reference designators (R1, C2, L3) identify specific components

For more symbol guides, check out our Greek letters and symbols guide since many electrical units use Greek characters.

Copy Paste Electrical Symbols

Need these symbols for a document, presentation, or project? Here is a complete copy-paste collection:

Final Thoughts

Electrical symbols are essential knowledge for anyone working with circuits, electronics, or electrical engineering. Whether you are a student learning the basics or a professional reading complex schematics, understanding these symbols makes the difference between guessing and knowing. Bookmark this page and come back whenever you need a quick reference.