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Electronics Symbols Download

Electronics Symbols Download

Download electrical safety, equipment and WEEE symbols in SVG, PNG and PDF formats. Learn what each marking means, when it is required and which electrical and electronic products it applies to.

The symbols on this page are free to use.

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Responsible Joe Aniba
Last Update 20/08/2026
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Symbols Compliance
Electrical Safety Symbols
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Indoor Use Only Symbol Download: SVG, PNG and PDF
Indoor Use Only Symbol Download: SVG, PNG and PDF
Preview

The indoor use only symbol indicates that electrical equipment is intended exclusively for use indoors. Download the house symbol in SVG, PNG and PDF and learn when it should be used.

What Does the Indoor Use Only Symbol Mean?

The house symbol indicates that equipment is designed for indoor use and should not be exposed to outdoor environmental conditions such as rain or excessive moisture.

It is commonly found on power supplies, adapters, lighting equipment and other electrical products intended only for indoor environments.

When Is the Indoor Use Only Symbol Used?

The symbol can be used when the safe use of electrical equipment is restricted to indoor locations. Whether the marking is required depends on the product, its design and the applicable product-specific safety requirements and standards.

The symbol should not be used as a substitute for assessing the environmental conditions and ingress protection required for the product.

Does Indoor Use Only Mean the Product Is Not Waterproof?

An indoor-use restriction generally means the equipment has not been designed for unrestricted outdoor exposure. However, the house symbol itself does not specify an IP rating or a particular level of protection against water and dust.

Check the product's IP rating and applicable safety requirements separately where protection against water or solid objects is relevant.

You Might Also Need These Symbols

Depending on your electrical product, you may also need the Class II Double Insulated, Class III, AC or DC and WEEE symbols. Products covered by EU or UK conformity legislation may also require a CE or UKCA mark.

Download

Download the indoor use only symbol below in SVG, PNG and PDF format.

indoor-use-only-symbol.pngindoor-use-only-symbol.svgindoor-use-only-symbol.pdf

Use the symbol only where an indoor-use restriction is appropriate for the equipment. Always check the applicable product standard and environmental requirements before applying the marking.

Looking for another electrical marking? View all electronics symbols.


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Functional Earth Symbol Download: SVG, PNG and PDF
Functional Earth Symbol Download: SVG, PNG and PDF
Preview

The functional earth symbol identifies an earthing connection provided for functional purposes rather than electrical safety. Download the symbol in SVG, PNG and PDF and learn when it should be used.

What Is Functional Earth?

A functional earth connection is provided to support the correct operation of electrical or electronic equipment. It may be used for purposes such as electromagnetic compatibility, interference reduction, signal reference or other functional requirements.

Unlike protective earth, functional earth is not primarily intended to protect users against electric shock.

When Is the Functional Earth Symbol Used?

The symbol can be used to identify a terminal or connection intended specifically for functional earthing. Whether such a connection is required depends on the design and intended operation of the equipment.

It should not be used to identify a protective earth terminal where the connection performs a safety function.

Functional Earth vs Protective Earth

Functional earth and protective earth have different purposes. Protective earth is a safety connection designed to provide protection against electric shock, while functional earth supports the operation or performance of the equipment.

Using the correct symbol is therefore important when identifying terminals and connections.

You Might Also Need These Symbols

Depending on the electrical design of your product, you may also need the Protective Earth, Class I Appliance or Class II Double Insulated symbols. View our Electronics Symbols page for other electrical safety and equipment markings.

Download

Download the functional earth symbol below in SVG, PNG and PDF format.

functional-earth-symbol.pngfunctional-earth-symbol.svgfunctional-earth-symbol.pdf

Use the symbol only for connections intended for functional earthing. Do not use it as a substitute for the protective earth symbol.

Looking for another electrical marking? View all electronics symbols.


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Class II Double Insulated Symbol Download: SVG, PNG and PDF
Class II Double Insulated Symbol Download: SVG, PNG and PDF
Preview

The Class II double insulated symbol identifies electrical equipment designed with double or reinforced insulation and without reliance on protective earthing. Download the double square symbol in SVG, PNG and PDF format.

What Is Class II Electrical Equipment?

Class II equipment is designed so that protection against electric shock does not rely solely on basic insulation or a protective earth connection. Additional safety is provided through double or reinforced insulation.

This type of equipment is commonly referred to as double insulated equipment.

When Is the Double Insulated Symbol Used?

The square-within-a-square symbol identifies electrical equipment classified as Class II. It indicates that the equipment uses the required insulation measures for Class II construction and does not rely on a protective earth connection for protection against electric shock.

The symbol should only be used when the product has actually been designed and assessed as Class II equipment.

Does Class II Equipment Need an Earth Connection?

Class II equipment does not rely on protective earthing for protection against electric shock. It should therefore not be confused with Class I equipment, which typically uses a protective earth connection as part of its safety measures.

A functional earth connection may still exist in some equipment for purposes unrelated to protection against electric shock.

You Might Also Need These Symbols

For other electrical constructions, see the Protective Earth and Functional Earth symbols. Depending on the product and market, electrical equipment may also require a CE or UKCA mark and the WEEE crossed-out wheeled bin.

Download

Download the Class II double insulated symbol below in SVG, PNG and PDF format.

Class-2-appliance-symbol.pngClass-2-appliance-symbol.svgClass-2-appliance-symbol.pdf

Use this symbol only for equipment that meets the applicable requirements for Class II construction. Do not use it merely because a product does not have an earth connection.

Looking for another electrical marking? View all electronics symbols.


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Protective Earth Symbol Download: SVG, PNG and PDF
Protective Earth Symbol Download: SVG, PNG and PDF
Preview

The protective earth symbol identifies a terminal intended for connection to an external conductor for protection against electric shock. Download the symbol in SVG, PNG and PDF and learn when it is used on electrical equipment.

What Is Protective Earth?

Protective earth, commonly abbreviated as PE, is an electrical safety connection. It connects accessible conductive parts of equipment to earth so that dangerous fault currents can be safely conducted away.

Protective earthing is commonly associated with Class I electrical equipment, which relies on basic insulation together with a protective earth connection for protection against electric shock.

When Is the Protective Earth Symbol Used?

The symbol is used to identify a protective earth terminal or connection. It allows installers, users and service personnel to distinguish the safety earth connection from other electrical connections.

Whether protective earthing is required depends on the construction of the equipment and the applicable electrical safety requirements.

Protective Earth vs Functional Earth

Protective earth has a safety function and is intended to protect against electric shock. Functional earth, by contrast, is provided for operational purposes such as electromagnetic compatibility or interference reduction.

The two connections therefore use different symbols and should not be confused.

You Might Also Need These Symbols

Depending on the construction of your electrical product, see also the Functional Earth, Class II Double Insulated and other electrical safety symbols. Products subject to EU or UK conformity legislation may also require a CE or UKCA mark.

Download

Download the protective earth symbol below in SVG, PNG and PDF format.

Protective-earth-symbol-class-1.pngProtective-earth-symbol-class-1.svgProtective-earth-symbol-class-1.pdf

Use this symbol only to identify a protective earth terminal or connection. Do not use it for a functional earth connection.

Looking for another electrical marking? View all electronics symbols.


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Class III Symbol Download: SVG, PNG and PDF
Class III Symbol Download: SVG, PNG and PDF
Preview

The Class III symbol identifies electrical equipment designed for protection against electric shock by operation at safety extra-low voltage. Download the symbol in SVG, PNG and PDF and learn when it is used.

What Is Class III Electrical Equipment?

Class III equipment is designed to operate at safety extra-low voltage (SELV). Protection against electric shock relies on the equipment being supplied at this low voltage, and voltages higher than SELV are not generated within the equipment.

Unlike Class I equipment, Class III equipment does not rely on protective earthing.

When Is the Class III Symbol Used?

The Roman numeral III inside a diamond identifies equipment classified as Class III. It should only be used when the electrical design of the product meets the applicable requirements for Class III construction.

Simply operating at a relatively low voltage does not automatically make a product Class III.

Class I, Class II and Class III

Class I equipment uses protective earthing as part of its protection against electric shock. Class II equipment relies on double or reinforced insulation, while Class III equipment relies on operation at safety extra-low voltage.

These classifications describe different methods of protection and should not be used interchangeably.

You Might Also Need These Symbols

Depending on your product, see also the Protective Earth and Class II Double Insulated symbols. Electrical products may also require the CE or UKCA mark and, in the EU, the WEEE crossed-out wheeled bin.

Download

Download the Class III symbol below in SVG, PNG and PDF format.

class-III-appliance-symbol.pngclass-III-appliance-symbol.svgclass-III-appliance-symbol.pdf

Use this symbol only for equipment that meets the applicable requirements for Class III construction. Do not use it simply because a product operates at low voltage.

Looking for another electrical marking? View all electronics symbols.


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You might also need these icons

Selling electrical or electronic products in France? You may need additional French EPR symbols, including Triman and Info-tri markings. You may also need the CE or UKCA mark, depending on the product and market where it is sold.