Updated 12th August 2026
Key Takeaways
- What it is: CAD software for electrical engineering allows electrical design engineers to create 2D drawings and 3D models and schematics for components including PCBs, integrated circuits, and wiring diagrams.
- Applications: PCB design support, IC modelling, wiring diagrams, simulation and testing, enclosure design, bill of materials generation, and PLC wiring.
- Key benefits: Automated processes, error-free accuracy, improved collaboration, and significant cost benefits over manual drafting.
Electrical engineers play a key role in today's society. The electrical engineering industry is gigantic – worth tens of billions in the UK alone – and covers a massive range of sectors including telecommunications, manufacturing, research and development, government and more.
In such a big and highly competitive industry, it's essential that electrical design engineers have all the software and tools that they need to deliver efficient projects in timely fashion – and that's where computer-aided design (CAD) comes in.
Specialised electrical CAD (ECAD) has become the cornerstone design technology of the sector over the last few decades, but how exactly is it used? In this guide, we'll talk about the history, applications and benefits of CAD for electrical engineers – and you can even download our free electrical engineering CAD software, DesignSpark Mechanical, and have a go yourself.
What Is CAD Software for Electrical Engineering?
CAD for electrical engineering is highly accurate, in-depth 2D drawing and 3D modelling software which electrical design engineers use to create, modify and analyse a variety of electrical components.
Common uses for CAD in the sector include support in the production of printed circuit boards (PCBs), integrated circuits (ICs) and a variety of other electrical schematics and wiring diagrams. The advanced features of CAD offer a wide variety of benefits to electrical engineers, from speed and efficiency of process through to the cost-effectiveness of production.
The History of CAD in Electrical Engineering
Computer-aided design technology as a wider concept has roots in the automotive and architectural industries of the 1960s with the likes of programs like Sketchpad and UNISURF. Sketchpad (1963) was the first graphical interface software that featured line drawing and movement of figures on a computer screen, while UNISURF (1968) was the first true CAD program – a tape-based computer that created ink drawing and tooling concepts for car bodies using infinitely scalable parametric "Bézier" curves (named after UNISURF's creator, Pierre Bézier).
Both of the tools mentioned above were ground-breaking technologies that paved the way for future CAD developments; however, their rudimentary design capabilities meant that the electrical engineering world wouldn't pick up on the benefits of CAD until a couple of decades later.
The 1980s was a massive decade for electrical engineering in relation to PCB production. Naturally much more complex in composition than many other engineering structures that had been started to be produced by CAD software, engineers were still creating PCB designs via stencil as surface-mount technology (SMT) revolutionised the assembly and manufacturing process.
With the rise of computers in the 80s came electronic design automation (EDA), which saw a swift uptake of CAD-driven tech in PCB design. Since that point, the complexity, accuracy and efficiency of CAD software for electrical engineers has improved to the point where it's now used in every phase of the planning, design and evaluation process.
How is CAD Used in Electrical Engineering?
Where do electrical engineers use CAD? The answer is throughout the entire engineering process, from the concept through to performance analysis.
Design
The level of depth in quality, accuracy and precision that modern CAD tools offer electrical engineering design specialists has completely overhauled the manual drafting process and enabled it to become significantly more complex, efficient and fast. With CAD, engineers can design a component or system from the schematic stages right through to assessing manufacturing methods, and the accuracy of the system has eliminated the need for complete redraws when modifications are required.
Simulation
CAD offers a sophisticated level of simulation analysis that allows engineers to test the theoretical performance of the components that they're modelling. For example, engineers in PCB design can verify their models using an integrated simulator that carries out relevant behavioural simulations, testing the electrical parameters and tolerances of the board model to ensure that it is fit for purpose, before production.
What Can Electrical Engineers Use CAD For?
CAD software enables a wide range of functions for electrical engineering, optimising processes for speed and efficiency. These applications include:
| Application | How CAD Is Used |
|---|---|
| PCB design support | Create and review component footprints, enclosure cutouts, and connector placements in 3D before PCB manufacture. |
| Integrated circuit (IC) modelling | Model and analyse IC component housings and mounting configurations in 3D. |
| Wiring diagrams and schematics | Create accurate 2D electrical schematics for control systems, power distribution, and automation circuits. |
| Enclosure and housing design | Model the mechanical housing for electrical components and assemblies — critical for ensuring fit, thermal management, and ingress protection compliance. |
| Simulation and testing | Test component placement, thermal distribution, and mechanical performance virtually before physical prototyping. |
| Bill of materials (BoM) | Automatically generate component lists directly from CAD models, reducing manual counting and procurement errors. |
CAD Software for Electrical Engineers
Electrical engineers use CAD software for 3D modelling, component design, enclosure design, and technical drawing. Our 3D CAD software, DesignSpark Mechanical, comes in three tiers, each one ideal for specific design requirements.
| Software Type | Best For | Cost |
|---|---|---|
| DesignSpark Mechanical Explorer | Getting started with 3D CAD for electrical engineering; component modelling and enclosure design | Free |
| DesignSpark Mechanical Creator | Intermediate electrical engineering CAD with advanced 3D modelling and engineering drawing output | Paid subscription |
| DesignSpark Mechanical Engineer | Full professional electrical engineering CAD with engineering drawings, GD&T tolerancing, and annotation tools | Paid subscription |
What Are the Benefits of CAD for Electrical Design Engineers?
Electrical engineering CAD has revolutionised the basics of component production in the industry. Here are the four biggest ways in which it is making an impact today.
| Benefit | Detail |
|---|---|
| Boosted efficiency and productivity | CAD automates time-draining manual tasks such as wire numbering, PLC tagging, and bill of materials generation, while 3D models can be assessed and revised quickly throughout the design process. |
| Error-free accuracy | Automated checks significantly reduce the risk of human error, and the 3D virtual environment highlights potential issues before production. |
| Improved collaboration | Multiple users can collaborate on projects via cloud storage, optimising communication across global teams and ensuring everyone is working from the same directive. |
| Less resources, lower costs | Faster, more accurate, and more collaborative CAD processes deliver significant cost benefits for any electrical engineering project. |
1. Boosted Efficiency and Productivity
The manual drafting process in electrical engineering was one full of time-draining tasks like wire numbering, tagging programmable logic controllers (PLCs) and creating a bill of materials (BoM). With CAD, all these processes become automated – plus there are numerous benefits to the design phase. 3D models can be assessed and revised quickly, narrowing down the product development window for quicker, more resourceful project completion.
2. Error-Free Accuracy
Human error is always a factor in manual drafting processes. The accuracy and consistency of CAD more or less eliminates this concern from designers' minds. Specialised ECAD software comes with a number of automated systems designed to drastically reduce the risk of errors, and the 3D virtual environment can highlight any potential issues before the model reaches the later stages of production. Likewise, CAD tools can generate reports for process improvement and offer error-free data transfer between modelling and manufacturing software.
3. Improved Collaboration
Electrical engineering applications, as with many industries that use CAD, are in depth, multi-phase and highly complex processes that require big teams to get the project from start to finish. With CAD, multiple users can easily collaborate on projects, typically via cloud storage. This massively optimises communication among different parts of the team, reducing the amount of downtime spent looking at revisions and edits and ensuring that everyone is following the same directive in production.
4. Less Resources, Lower Costs
Increased efficiency, productivity, accuracy and collaborative ability all make CAD-driven electrical engineering software an extremely cost-effective venture. When your work is done faster and to a higher standard with less resources involved, you know that there are going to be significant cost benefits to enjoy with it.
CAD Across Industries: More From DesignSpark
CAD software is used across a wide range of industries beyond electrical engineering. Go through each use case in the guides below. You can also read our guide to the top 3D CAD software solutions on the market.
| Industry / Use Case | Guide |
|---|---|
| Architecture | CAD in Architecture: How It Works and Benefits |
| Construction | CAD in Construction |
| Civil Engineering | The Use of CAD in Civil Engineering |
| Building Design | CAD Software for Building Design |
| Automotive Industry | CAD in the Automotive Industry |
| Mechanical Engineering | CAD for Mechanical Engineering |
| Interior Design | How is CAD Used for Interior Design? |
| Jewellery Design | CAD for Jewellery Design |
| Fashion Design | How is CAD Used in Fashion Design? |
| Rapid Prototyping | How is CAD Used for Rapid Prototyping? |
Frequently Asked Questions
What is CAD software for electrical engineering?
CAD software for electrical engineering is a specialist 2D and 3D design software that allows electrical engineers to create component models, enclosure designs, wiring diagrams, and schematics. It replaces manual drafting with a faster, more accurate, and more collaborative digital process.
What CAD packages do electrical engineers use?
Electrical engineers use CAD software for 3D component modelling, enclosure design, and engineering drawing. DesignSpark Mechanical is a free CAD package that provides 3D modelling capabilities suitable for electrical engineering work at no cost. Creator and Engineer plans add engineering drawing output, GD&T tolerancing, and advanced modelling tools for more demanding electrical design workflows.
Do electrical engineers use CAD?
Yes. CAD software is used throughout the electrical engineering design process — from initial component and enclosure modelling through to simulation, technical documentation, and manufacturing file generation.
What is CAD used for in electrical engineering?
In electrical engineering, CAD is used for 3D component and enclosure modelling, wiring diagram creation, simulation and performance testing, bill of materials generation, PLC wiring support, and technical documentation. The accuracy and automation features of modern CAD software have transformed every phase of the electrical design process, from initial concept through to post-production maintenance.
Is there free CAD software for electrical engineers?
Yes. DesignSpark Mechanical Explorer is a free 3D CAD download suitable for electrical engineering design work, including component modelling and enclosure design. Creator and Engineer subscription plans are available for users who need engineering drawings, GD&T annotations, and additional design features.
Free CAD Software for Electrical Engineers: Get Started With DesignSpark Mechanical
You can get started with our free CAD software for electrical engineers today! Download DesignSpark Mechanical Explorer to see what our basic CAD package looks like, then upgrade to Creator or Engineer to get a host of advanced features.
If you want to know more about what our CAD software has to offer, you can learn the basics of DesignSpark Mechanical here or take a look at our support FAQs and Mechanical forum to get all of the answers that you need.
Download DesignSpark Mechanical Explorer for free
Sign up to DesignSpark Mechanical Creator today
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