Unregulated vs Regulated Power Supply

In the world of electronics, power supplies play a crucial role in delivering the necessary energy to drive various devices and systems. 

When it comes to choosing the right power supply, the debate between unregulated vs regulated power supply often comes up. This blog post will provide an in-depth look at these two types of power supplies - fully covering their differences, advantages, and disadvantages.

We will also discuss how to tell if a power supply is regulated or unregulated, and help you decide which is best for your specific needs among other useful info.

What is the Difference Between Regulated vs Unregulated Power Supply?

The topic of regulated vs unregulated power supply can be quite complex if you don't have a good understanding of electronics. So we'll break it all down in the most easy-to-understand terms in the following sections.

What is a Regulated Power Supply?

A regulated power supply works to ensure a constant output voltage, no matter what fluctuations in input voltage or load occur. To guarantee this stability and precision, advanced electronic components such as voltage regulators are implemented into the system. 

This technology is often used in sensitive applications like computers, laboratory instruments, and communication devices where obtaining precise control over electrical current flows is critical for optimal performance.

A regulated power supply's voltage regulation ensures that sensitive components are protected from fluctuations in input voltage, which can lead to inconsistent performance or even damage. 

This protection is particularly important when dealing with high-voltage power supplies, as the potential for damage is even greater. Furthermore, a regulated power supply can help prevent bad power supply symptoms, such as overheating, noise, or erratic behavior in connected devices.

What is an Unregulated Power Supply?

In contrast to regulated power supplies, unregulated ones do not have the same degree of voltage regulation. Instead, their output changes depending on both input voltage and load conditions. 

Unregulated power supplies offer a cheaper design that is simpler in structure than its counterpart; however, they may lack support for applications needing consistent voltages as fluctuations can lead to damaging delicate components or yield unwanted results.

Unregulated power supplies can still be used in many applications where voltage stability is not critical. For instance, they can be utilized in basic power supply sizing projects for non-sensitive electronics or devices with built-in voltage regulation.

Nevertheless, it is critical to grasp the restrictions of an unregulated power supply and all potential hazards that come with its usage.

How to Tell if a Power Supply is Regulated or Unregulated

Now let's explain how to tell if a power supply is regulated or unregulated. To determine this, you can look for the following indicators:

  1. Check the product specifications or datasheet: This information should clearly state whether the power supply is regulated or unregulated. Manufacturers often provide details about power supply voltage regulation capabilities and other relevant specifications.
  2. Identify the voltage regulator: A regulated power supply will most likely have a voltage regulator component, whereas an unregulated source won't. If you notice one present, this is usually a good indication that it's regulated.
  3. Measure the output of varying loads: An effective and accurate way to differentiate between the two types of supplies lies in their efficacy at maintaining stable output voltages regardless of load conditions - something only supplied by regulatory sources. As such, assessing how well your device performs under various loads can be immensely helpful here!

Unregulated vs Regulated Power Supply: Pros, Cons, and Use Cases For Each

Now let's take a look at the pros and cons of each type of power supply, as well as some common use cases.

Pros & Cons of Regulated Power Supplies


  • Stable output voltage: Regulated power supplies guarantee a safe and consistent voltage output, which helps protect sensitive components from potential damage.
  • Suitable for sensitive electronics: Devices that require precise and stable voltage, such as lab equipment and computers, benefit from regulated power supplies.
  • Can handle fluctuations in input voltage: Regulated power supplies can regulate the input current in order to maintain a steady voltage, even if the input voltage changes. This ensures that connected devices continue to run reliably.


  • Higher upfront cost: Regulated power supplies tend to be more costly due to their additional components and complex design.
  • Heavier: The inclusion of voltage regulators and other components can make regulated power supplies bulkier and heavier in comparison to unregulated power supplies, but this comes with the added safety.
  • Lower power supply efficiency: The voltage regulation process can lead to some minor energy loss.

Pros & Cons of Unregulated Power Supplies


  • Less expensive: Unregulated power supplies have simpler designs and fewer components, making them more cost-effective than regulated options.
  • Simpler design: Without voltage regulation components, unregulated power supplies have a straightforward design that can be an advantage in certain applications.
  • Smaller and lighter: Due to their lack of additional components, unregulated power supplies are usually smaller and lighter compared to regulated ones.


  • Fluctuating output voltage: The output voltage of unregulated power supplies can vary depending on input voltage and load conditions, which may cause issues for sensitive electronics.
  • Not suitable for sensitive electronics: Devices that require a stable voltage may be impaired or even damaged when using an unregulated power supply.
  • Can be affected by changes in input voltage: Unregulated power supplies are more susceptible to variations in the source voltage, leading to instability in the output voltage.

Use Cases for Regulated Power Supplies

Regulated power supplies are the best option for applications requiring a stable voltage, such as:

  • Computers and servers: Consistent supply of power is essential for computers and servers to perform optimally and prevent data loss or hardware breakdown.
  • Laboratory equipment: To ensure accurate results, precision instruments used in scientific research need regulated power supplies.
  • Communication devices: Telecommunication and networking systems rely on regulated power supplies for proper signal transmission and no disruptions.
  • High-voltage power supplies: For high-voltage applications, regulated power supplies provide the necessary stability to keep sensitive components from being damaged and guarantee safe operation.

Use Cases for Unregulated Power Supplies

Unregulated power supplies are ideal for applications where voltage fluctuations are allowed, such as:

  • Motors and solenoids: These devices generally have some room for voltage variation without affecting their performance.
  • LED lighting (with proper current protection): With suitable current limiting mechanisms in place, unregulated power supplies can safely be used to light up LED systems.
  • Non-sensitive electronics: For applications where voltage stability is not a critical aspect, unregulated power supplies offer a cost-effective and compact solution.

So, Which is Better: Unregulated vs Regulated Power Supply?

So when it comes to unregulated vs regulated power supply, which comes out on top? The superior choice is undoubtedly a regulated power supply. This is especially true for sensitive electronics that require a stable voltage, where a regulated power supply is essential for optimal performance and protection.

Regulated power supplies offer more reliable and stable performance, as well as greater safety, compared to unregulated power supplies. Although the latter may be a cheaper and more compact choice for less critical applications, regulated power supplies are generally preferred for a variety of needs.

Find the Most Efficient, Reliable Regulated Power Supplies at Bravo Electro

At Bravo Electro, we offer a wide range of regulated power supplies designed to meet various application requirements. Our selection includes enclosed power supply, open frame power supply, DIN rail power supply, and LED driver power supply. We understand the importance of providing reliable and efficient power solutions for your projects, and our team of experts is here to help you choose the best product for your needs.

Whether you're seeking a modular power supply for a custom-built device or need to understand the difference between UL listed vs UL recognized power supplies, we have the knowledge and expertise to assist you.

Additionally, we can guide you through the differences between class 2 vs class II power supply, as well as the nuances between open frame vs enclosed power supply to help you make an informed decision.

Wrapping Up Our Unregulated vs Regulated Power Supply Comparison

In conclusion, the choice between unregulated and regulated power supplies depends on your specific needs and the requirements of your application. Due to the risks associated with unregulated power supplies, regulated is the way to go.

At Bravo Electro, our regulated power supplies come in various voltage ranges, such as 12V power supplies, 24V power supply, and 48V power supply to cater to different needs.

As you delve deeper into the world of power supplies, you'll encounter various other aspects to consider, such as what’s the difference between AC and DC power, is household electricity is AC or DC, and more. Understanding these topics can help you select the best power supply for your project.

At Bravo Electro, we're here to help you navigate the complex world of power supplies, ensuring that you find the most suitable and reliable solution for your application. Our team of experts is always available to provide guidance and support, so feel free to reach out with any questions or concerns you may have.