Best Solid State Relays of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 9, 2026

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Solid State Relays are an essential component of modern electrical systems. Unlike traditional electromechanical relays, they use semiconductor switches to control the flow of electricity. They offer many advantages over their mechanical counterparts, including faster switching times, longer lifespans, and greater reliability. Solid State Relays are also quieter and generate less heat, making them ideal for use in sensitive applications. They are commonly used in industrial automation, HVAC systems, and other high-performance applications where precise control is essential. With a wide range of sizes and configurations available, Solid State Relays offer a flexible and reliable solution for any electrical system.

At a Glance: Our Top Picks

BlueStars SSR-25DD Solid State Relay Cover #TOP 1
BlueStars SSR-25DD Solid State Relay
ftb score rating icon 9.8
BlueStars Solid State Relay SSR-25DA Cover #TOP 2
BlueStars Solid State Relay SSR-25DA
ftb score rating icon 9.7
Inkbird Solid State Relay 40DA DC SSR Cover #TOP 3
Inkbird Solid State Relay 40DA DC SSR
ftb score rating icon 9.5

Top 10 Solid State Relays

#TOP 1

BlueStars SSR-25DD Solid State Relay

SSR-25DD
BlueStars SSR-25DD Solid State Relay Cover
BlueStars Solid State Relay SSR-25DD DC to DC Input 3-32VDC to Output 5-200VDC 25A Single Phase Plastic Cover (Pack of 2)

The BlueStars SSR Relay is an efficient electronic switching device that allows you to control electrical loads swiftly and without mechanical wear. Its rapid switching capability enhances your automation tasks, making processes like temperature control and CNC machinery operation smoother. With a robust optocoupler and heat-dissipating design, it ensures reliable performance even in harsh environments. Plus, its easy installation means you can integrate it into your setup with minimal hassle, saving you time while ensuring safety and longevity.

What We Like
Fast switching capability
High-performance optocoupler
Easy installation
Durable in harsh conditions
#TOP 2

BlueStars Solid State Relay SSR-25DA

SSR-25DA PO2
BlueStars Solid State Relay SSR-25DA Cover
BlueStars 2pcs SSR-25DA 25A 250V Solid State Relay Module

BlueStars SSR-25DA Relay is a high-performance electronic switching device suitable for various applications. It offers fast switching without mechanical contact, ensuring durability and safety. Perfect for controlling temperature, CNC machinery, and more, this relay provides high isolation between circuits. Equipped with a heat-dissipating metal back plate and copper terminal lug, it ensures superior conductivity. The SSR-25DA Relay is easy to install, saving you time and effort while seamlessly integrating into your setup.

What We Like
Fast switching
High performance optocoupler
Easy installation
#TOP 3

Inkbird Solid State Relay 40DA DC SSR

ITC-100-LW
Black Heat Sink
Inkbird Solid State Relay 40DA DC SSR Cover
Inkbird Solid State Relay 40DA DC SSR Black Heat Sink for PID Thermostat Temperature Controller

The Inkbird Solid State Relay 40DA DC SSR is a black heat sink designed for temperature control. It has a load voltage of 24-380VAC, load current of 40A and input voltage of DC 3-32V. Its heat sink mounting thread diameter is approximately 0.5cm and its total size is around 8 x 4.9 x 4.9cm. This product falls under the category of Solid State Relays.

What We Like
Can handle high load voltage and current up to 380VAC and 40A respectively.
Easy to install with a heat sink mounting thread diameter of approximately 0.5cm.
Compact size with a total dimension of 8 x 4.9 x 4.9cm, making it easy to fit into tight spaces.
#TOP 4

HiLetgo Solid State Relay with Alloy Heat Sink

3-01-1247-40A
SSR-40DA
HiLetgo Solid State Relay with Alloy Heat Sink Cover
HiLetgo 2pcs SSR-40DA Solid State Relay Single Phase Semi-Conductor Relay Input 3-32V DC Output 24-380V AC

This solid state relay offers an input voltage of 3-32V DC and output voltage of 24-380V AC, making it suitable for a range of applications. Its DC to AC control method ensures efficient operation, and the SSR-40DA model can handle up to 40A and 250V. Plus, the alloy heat sink helps dissipate heat for added safety.

What We Like
Wide input and output voltage range
Efficient DC to AC control method
Can handle up to 40A and 250V
Alloy heat sink helps dissipate heat for added safety
#TOP 5

Kyoto Electric DC-to-DC Solid State Relay

KF0602D
Kyoto Electric DC-to-DC Solid State Relay Cover
Kyoto Electric KF0602D DC-to-DC Solid State Relay, 32 Volt, DC Input, 2 Amp, 4-Pin, 1.4"L x 0.3"W x 0.9"H

The Kyoto Electric DC-to-DC Solid State Relay is designed to operate with control voltage ranging from 3-32VDC. This relay features a single-pole, single-throw (SPST) contact form and measures 1.4"L x 0.3"W x 0.9"H. The relay's solder lead terminal type makes it easy to install and use. This product is a great choice for those in need of a reliable solid state relay for their project.

What We Like
Easy to install and use
Compact size
Reliable performance
#TOP 6

Coliao SSR-40DA Solid State Relay

Coliao-SSR-40DA Relay
3pcs SSR-40DA
SSR-40DA
Coliao SSR-40DA Solid State Relay Cover
3pcs Solid State Relay SSR-40DA Single Phase Solid State Relay Module Input 3-32V DC Output 24-380V AC for Temperature Controller

The Coliao SSR-40DA Relay is a robust solid state relay module designed for controlling temperature with precision. Operating on a DC input of 3-32V, it can handle AC outputs ranging from 24-380V, making it ideal for various applications. Its compact size allows for easy installation in tight spaces. This relay operates silently and without electric sparks, ensuring reliability in environments that may be corrosive, moist, or dusty. With its high switching speed, you can expect efficient performance in automatic control systems, enhancing your overall setup.

What We Like
High switching speed
Silent operation
Compact size
Corrosion-resistant
Versatile applications
#TOP 7

HiLetgo SSR-25DA Solid State Relay

3-01-1247-25A
SSR-25DA
HiLetgo SSR-25DA Solid State Relay Cover
HiLetgo 2pcs SSR-25DA 25A 250V Solid State Relay Module

The HiLetgo SSR-25DA Relay is a reliable solid state relay designed for efficient control of electrical devices. With an input voltage range of 3-32V DC, it allows you to easily connect various control systems. Its output voltage can handle 24-380V AC, making it suitable for a wide range of applications. The included alloy heat sink helps to dissipate heat effectively, ensuring reliable operation and longevity. You can benefit from the convenience of DC to AC control, which simplifies the process of managing electrical loads in your projects.

What We Like
Wide voltage compatibility
Efficient heat dissipation
Easy DC to AC control
Reliable performance
#TOP 8

LCLCTC Solid State Relay DD Series

10DDSSR24710
LCLCTC Solid State Relay DD Series Cover
LClCTC (10pcs) Solid State Relay DD 3.3V 3V 5V 12V 24V 1.5A,Signal Relay for PLC,No Contact DC to DC;Input:3-32VDC;Output:5-60VDC;Din Rail

The LCLCTC Solid State Relay offers a wide input voltage range from 3 to 32VDC, making it flexible for various control systems. It can handle output voltages between 5 and 60VDC, allowing you to manage different devices with ease. Since it has no mechanical contacts, it lasts much longer than traditional relays, reducing maintenance needs. However, to keep it safe and efficient, the current should not exceed 1.5A as it doesn’t include a heat sink. Plus, its design includes a detachable guide rail base compatible with standard 35mm rails, which makes installation and removal quick and convenient.

What We Like
Wide input voltage range
High output voltage support
Long service life
Compact, rail-mounted design
#TOP 9

Inkbird SSR 40DA Solid State Relay

ESSR-40DAC
Black Heat Sink
SSR-40DA 1 Pack
Inkbird SSR 40DA Solid State Relay Cover
Inkbird SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller

The Inkbird SSR 40DA Relay is designed to handle input voltages from 3 to 32 volts DC, making it compatible with a wide range of control devices. It can switch AC loads between 24 and 380 volts, allowing you to control various appliances safely and efficiently. This solid state relay offers reliable performance without mechanical parts, which means less wear and quieter operation. The SSR-40DA model is a compact, single-unit relay that is easy to install in your temperature control system, providing you with a hassle-free way to manage power delivery for your heating or cooling projects.

What We Like
Wide DC input range
High AC output voltage
Durable solid state design
Compact single-unit relay
#TOP 10

CGELE Solid State Relay SSR-25DD

DC to DC 25A
CGELE Solid State Relay SSR-25DD Cover
CG Solid State Relay SSR-25DD DC to DC Input 3-32VDC To Output 5-240VDC 25A Single Phase Plastic Cover

The CGELE SSR-25DD is a solid state module relay with a switch that produces no spark or noise, has high switching speed, and is anti-corrosive, moisture-proof, anti-vibration, and has a long life. Each package comes with two mini bags of thermal grease that can be applied to the back of the SSR to make temperature dissipate faster. It is made of metal, plastic, and electronic parts and is a must-have component for temperature controllers and other machinery control systems. With a current and frequency of 25A and 50/60Hz, respectively, it is ideal for automatic process control applications. Its total size is approximately 58 x 45 x 32mm/2.3" x 1.8" x 1.26" (lwt) and it weighs 116g. The CGELE SSR-25DD is reliable, has high electromagnetic compatibility, and other characteristics that make it a great choice for your needs.

What We Like
High switching speed
No spark or noise
Anti-corrosive
Buying Guide Image

Basic Information to Help You Figure out the Best Solid State Relays

Introduction

Solid State Relays (SSRs) are electronic switching devices that use semiconductor technology to switch on and off electrical loads. They are a type of relay, which is a device that controls the flow of electricity in an electrical circuit. Relays are used in many applications, including automation, control systems, and process control.

Choosing the Right SSR

There are several factors to consider when choosing a Solid State Relay, including the type of load, the current and voltage ratings, the switching frequency, and the environmental conditions.

Type of Load

The first thing to consider is the type of load that the SSR will be controlling. There are two main types of loads: AC loads and DC loads. AC loads are loads that are powered by alternating current, such as motors, fans, and pumps. DC loads are loads that are powered by direct current, such as solenoids and heating elements. SSRs are available for both AC and DC loads, so it is important to choose the right type for your application.

Current and Voltage Ratings

The current and voltage ratings of the SSR are also important factors to consider. The current rating is the maximum amount of current that the SSR can handle, while the voltage rating is the maximum voltage that the SSR can withstand. It is important to choose an SSR with a current and voltage rating that is appropriate for your application.

Switching Frequency

The switching frequency of an SSR is the number of times per second that the SSR can switch on and off. This is important because some loads, such as motors and fans, require a high switching frequency. If the SSR has a low switching frequency, it may not be able to keep up with the demands of the load, which can cause problems.

Environmental Conditions

Finally, it is important to consider the environmental conditions in which the SSR will be used. This includes factors such as temperature, humidity, and exposure to dust and other contaminants. SSRs are available in a range of enclosures and ratings, so it is important to choose one that is appropriate for the environment in which it will be used.

Conclusion

In conclusion, choosing the right Solid State Relay for your application requires careful consideration of several factors. These include the type of load, the current and voltage ratings, the switching frequency, and the environmental conditions. By taking the time to carefully evaluate these factors, you can ensure that you choose the right SSR for your application.

Frequently Asked Questions (FAQs)

1. What is the problem with solid state relays?

One common problem with solid state relays is that they may stay on even after the input power is removed. This issue is often caused by a short circuit in the load circuit or a reset failure. Electricians frequently encounter this problem when diagnosing the device.

2. Do you need a fuse with a solid state relay?

Yes, it is recommended to use fuses to protect solid state relays against load short circuits. Fast-acting fuses should be used, especially for small ratings. This helps ensure the safety and proper functioning of the solid state relay.

3. What is the life expectancy of a solid state relay?

Solid state relays have a longer lifespan compared to relays with movable contacts. Without movable parts, there is no wear and tear or carbon buildup. An electromechanical relay (EMR) has an average lifespan of one million cycles, while a solid state relay (SSR) can last approximately 100 times longer.

4. What is the most common solid state relay?

The most common types of solid state relays are single phase SSR and three-phase SSR. Single-phase SSRs are designed to switch a single phase of the AC load voltage. Three-phase SSRs are used for loads that require a three-phase power supply.

5. What are the disadvantages of solid state relay?

Some disadvantages of solid state relays include their high cost, specific current/voltage characteristics, fixed value voltage drop on output due to internal impedance, leakage current at the output even in the OFF mode, and generation of waste heat during the ON mode.

Editor's Notes

During our solid state relay research, we found 24 solid state relay products and shortlisted 10 quality products. We collected and analyzed 8,461 customer reviews through our big data system to write the solid state relays list. We found that most customers choose solid state relays with an average price of $16.43.

The solid state relays are available for purchase. We have researched hundreds of brands and picked the top brands of solid state relays, including BlueStars, Inkbird, HiLetgo, Kyoto Electric, Coliao. The seller of top 1 product has received honest feedback from 4,578 consumers with an average rating of 4.9.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.