The capacitor symbol is vital in electrical and circuit diagrams. It represents one of the most common electronic components. Understanding the capacitor symbol helps you in all your work with electric circuits. Capacitor symbols have many versions that depend on the component type. They follow international design conventions to help designers create accurate electrical systems.
This article explores different capacitor symbols in circuit diagrams and shows how they help circuits work better through accurate analysis.
In this article
All Common Types of Capacity Symbols
- Non-Polarized Capacitor Symbol
- Polarized Capacitor Symbol
- Voltage-dependent Capacitor Symbol
- Variable Capacitor Symbol
- Trimmer Capacitor Symbol
- Electrolytic Polarized Capacitor Symbol
Non-polarized capacitor symbol
The non-polarized capacitor symbol represents capacitors that have no polarity and can be connected in any direction in a circuit. It consists of two parallel straight lines, each of equal length.
This symbol has many uses in AC circuits, including filters, oscillators, and tuning circuits. Non-polarized capacitors, like ceramic and film ones, are often preferred.
They are durable, reliable, and can operate at high frequencies. The simplicity of the non-polarized capacitor symbol ensures clarity when interpreting circuit diagrams.

Polarized Capacitor Symbol
The polarized capacitor symbol is distinct. It has one straight line for the positive plate and one curved line for the negative plate. This symbol shows polarized capacitors, like electrolytic ones.
Polarized capacitors are common in DC circuits, including power supplies, audio systems, and timing circuits, and must be installed correctly to avoid damage or circuit failure.
The symbol's design shows the capacitor's directional nature. It helps engineers and technicians ensure proper orientation during installation.

Voltage-dependent capacitor symbol
Standard capacitor symbols include extra elements to represent their voltage-dependent characteristics. A symbol of a standard capacitor has extra markings. These include diagonal lines, curved shapes, or annotations. They show how its capacitance responds to applied voltage.
Varactors are nonlinear capacitors. They allow for frequency tuning in oscillator devices and phase-locked loops.
Precise capacitance control from voltage changes can adjust circuit performance. This component's unique symbol notation helps identify schematic diagrams and distinguishes it from standard capacitors, which do not react to voltage changes.

Variable Capacitor Symbol
The variable capacitor symbol is a standard capacitor. It has an arrow or diagonal line through it. This shows its capacitance is adjustable. Variable capacitors tune and adjust frequency in circuits, like radios and signal generators.
These capacitors allow fine control of the circuit by varying the capacitance. The symbol's unique arrow indicates that it is adjustable, making it easy to spot in schematic diagrams.

Trimmer Capacitor Symbol
The trimmer capacitor symbol, a variation of the variable capacitor symbol, includes a diagonal arrow or line. It may have extra markings to show it's adjustable.
Trimmer capacitors are small variable capacitors. They are used for tuning circuits. They are often used in RF circuits, oscillators, and filters. These applications need precise tuning. The symbol shows the component's role in minor adjustments, not continuous tuning.

Electrolytic Polarized Capacitor Symbol
The electrolytic capacitor symbol is the same as polarized capacitors. It shows the required polarization directions. These capacitors handle large capacitance loads. They are used in power supply filtering and signal handling, where energy storage is needed. The symbol shows how the electrolytic capacitor must face to protect it from harm.

Explore More Capacity Symbols on EdrawMax
EdrawMax is the best platform for a wide range of capacitors and other electronic symbols. This visual collaboration app is a valuable tool. It has a library of over 26,000+ symbols.
So, it is great for both professionals and hobbyists. The electronic symbol library has all kinds of capacitor symbols. It includes basic and advanced versions. Use it to create clear, precise circuit diagrams with ease. EdrawMax simplifies your work. It has all the tools you need in one place, whether designing electrical systems, working on schematics, or exploring electronics.
What is Wondershare EdrawMax?
EdrawMax is a visual collaboration app. It lets users create professional diagrams and drawings easily. The program serves engineers, designers, teachers, and students. It helps them make flow charts, mind maps, electrical schematics, and circuit designs. EdrawMax helps you reach your goals faster. It lets you draw your thoughts using built-in symbols and styles. Key features of EdrawMax:
- It offers 26,000+ symbols for various electronic and capacitor products.
- Support 210 different diagram styles in our platform, including flowcharts, schematics, and network plans.
- Using simple drag-and-drop tools helps you design professional-standard diagrams without any prior experience.
- The software works on Windows, Mac, and Linux. It can also run as a web app so that users can access it on all their devices.
- The software lets many users work together in real time. They can mark up projects and exchange updates with their team.
- The software connects with Microsoft Office and Google Workspace. It helps users work better.
- Convert diagrams to PDF, PNG, SVG, and Visio formats. This will make them easy to share.
- Offers a large collection of project start templates and examples.
- Edrawmax’s smart tools simplify your work. They streamline diagram creation and handle graphic elements.
How to Find More Symbols on EdrawMax?

Step 1Launch EdrawMax
Open the EdrawMax application and log in to get started.

Step 2Create a New Project
Click on the "New" tab in the interface. Then, choose "Blank Diagram" to start a new workspace for your project.

Step 3Access the Symbol Library
Use the left menu to access Symbols in your workspace. Navigate to the Symbols panel to find symbols available from EdrawMax. Each diagram style exhibits its unique format within the symbol collection.

Step 4Search for Specific Symbols
The search bar at the top of the page enables users to find symbols by entering their desired terms.

Step 5Download Additional Symbols
Click on "More Symbols” at the bottom of the symbol library to find downloadable symbol packs in the pop-up window options. Select the symbol packs you desire from the available collection. The saved items will appear within your created library.

Step 6Create Custom Symbols
In EdrawMax, users can create custom symbols using its building system. To do this, right-click on a new symbol. You can save your new asset to recent diagrams by selecting "Add to Library" from the right-click menu.

Step 7Discover the Symbol Library
Explore the symbol library to unlock the full potential of EdrawMax. Inside, you’ll find over 26,000 expertly designed symbols. These symbols can enhance your diagrams for electronic and technical uses.

How to Make a Circuit Diagram on EdrawMax?
The software EdrawMax helps users create circuit diagrams with ease. Whether you’re starting from scratch or using a template, here’s how to do it step by step:

Step 1Open EdrawMax
Launch and log in to EdrawMax, then select "New" under the main menu options.

Step 2Select a Template or Start from Scratch
Select an electrical diagram. Choose "blank drawing" to start from scratch. Or, use "new from templates" for built-in templates.

Step 3Add Circuit Symbols
Open the symbol library. Place the required capacitor symbols with the other elements on the workspace to create your schematic. To link your elements, use drawing tools to place wires or lines. The smart connectors in EdrawMax help users align and wire components.

Step 4Arrange and Customize
Your design needs labels and either text annotations or dimensions for clarity. You can apply formatting options from the toolset to improve the way your diagram looks.

Step 5Review and Export
After finishing your diagram, review it and select "Export" to generate and save it in the desired format like PDF, PNG, or Visio files for sharing and printing purposes.

Ending Notes
Mastering capacitor symbols is essential for anyone in electrical engineering or circuit design. Knowing the types of capacitor symbols will help you. Their roles and diagram representations are meaningful, too. It will ensure precise and effective circuit creation and troubleshooting.
For high-frequency circuits, use non-polarized capacitors. For DC, use polarized ones. For advanced designs, use supercapacitors. Correct symbols ensure accurate, reliable designs.
To streamline your circuit design, try EdrawMax. It is a powerful tool. It has a library of 26,000+ symbols. It has intuitive features like drag-and-drop, intelligent connectors, and cross-platform support. EdrawMax lets anyone, from experts to beginners, create top-notch diagrams quickly and precisely.
Start using EdrawMax today. Unlock its power to simplify your projects and bring your electrical designs to life!