SunFounder 2 Channel DC 5V Relay Module
4.6Editor score
Compatible with Arduino and Pi
Standard interface connections
LED status indicators included
In this guide
Selecting the right 5V relay module is essential for any electronics project involving high voltage or current loads. These modules act as secure switches allowing low voltage signals to control powerful devices safely. A quality module ensures stable performance and protects your microcontroller from electrical noise or damage during operation.
We evaluated ten leading products based on critical factors like optocoupler isolation, trigger sensitivity, and load capacity. Each entry was scrutinized for build quality, ease of wiring, and compatibility with common development boards. Our goal is to help you find a reliable component that fits your specific automation or control needs.
Each pick in this list highlights unique strengths such as multi-channel designs or enhanced safety features. You will find detailed breakdowns of specifications and real-world application scenarios for every item. Please note that availability and specific pricing may change over time so verify current details before purchasing.
Top 3 Picks for Best 5V Relay Module
4pcs DC 5V Relay Module
4.6Editor score
Optocoupler isolation protects ports
High or low level trigger
Screw terminals for easy wiring
ELEGOO 4 Channel DC 5V Relay Module
4.5Editor score
Four independent control channels
Active low input signals
Flexible NO NC wiring
Top 10 Best 5V Relay Module in 2026 Compared
The following table provides a side-by-side overview of all ten selected relay modules. It highlights key specifications such as channel count, isolation type, and trigger options to help you quickly identify the right fit for your project requirements.
ProductsSpecificationsEditor scorePrice
Editor's Choice
4pcs DC 5V Relay Module
1 Channel Relay
Opto Isolation
5mA Trigger Current
250V AC Load
4.6Editor score
Editor's Choice
HiLetgo 2pcs 5V One Channel Relay Module
1 Channel Relay
SMD Opto Isolation
High Low Trigger
10A Max Load
4.6Editor score
Best Budget
SunFounder 2 Channel DC 5V Relay Module
2 Channel Relay
LED Indicators
Arduino Compatible
Compact Board Size
4.6Editor score
5v Relay Module 5V Indicator Light LED
1 Channel Relay
TTL Control Signal
AC DC Load Support
Motor Control Ready
4.6Editor score
2PCS 5V 4 Channel Relay
4 Channel Relay
High Current Relay
Fault Tolerant Design
Bolt Holes Included
4.3Editor score
4pcs DC 5V Relay Module 2 Channel
2 Channel Relay
High Current Relay
Opto Isolated Inputs
Terminal Plate Included
4.4Editor score
HiLetgo 2pcs 5V 30A One Channel Relay Module
1 Channel Relay
30A High Load
Multi Voltage Support
Strong Drive Capability
4.6Editor score
ELEGOO 4 Channel DC 5V Relay Module
4 Independent Channels
Status LEDs
10A Contact Rating
JD VCC Isolation
4.5Editor score
8 Channel Relay Module DC 5V Relay Board
8 Channel Relay
Jumper Trigger Mode
High Current Relay
Fixed Bolt Holes
4.5Editor score
5V One Channel Relay Module Relay Switch
1 Channel Relay
Dual Indicator Lights
Optocoupler Insulation
10 Pack Value
4.7Editor score
1. 4pcs DC 5V Relay Module – Best Overall 5V Relay Module
4pcs DC 5V Relay Module
Working Voltage DC 5V
Max Load AC 250V
Trigger Current 5mA
Opto Isolation Circuit
This relay module stands out as a top choice for general electronics projects requiring robust switching capabilities. It boasts a high rating of 4.6 stars from users who appreciate its reliable performance. The inclusion of optocoupler isolation ensures your microcontroller remains safe from electrical spikes or noise.
Pros
- Strong driving ability
- Prevents port damage
- Easy jumper setup
- Secure screw terminals
- Wide microcontroller support
Cons
- Basic visual design
- Single channel per board
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Key strengths include the fault-tolerant design which prevents accidental operation if the control line breaks. You can easily configure high or low level triggers using the built-in jumper. The terminals allow for direct wiring of normally open and normally closed contacts making installation straightforward for beginners and experts alike.
While the board design is functional rather than sleek it prioritizes utility over aesthetics. The single channel layout means you may need multiple units for complex projects. However this simplicity reduces cost and complexity ensuring stable operation without unnecessary features that could introduce failure points.
Ideally suited for Raspberry Pi CNC machines or ARM based systems this module offers excellent value. It is a solid choice for anyone needing a dependable switch for motors or lights. We recommend it as a primary option for most standard automation tasks.
Secure Isolation Technology
The optocoupler isolation prevents high voltage currents from damaging sensitive input output ports on your controller board.
Flexible Trigger Configuration
A simple jumper allows you to switch between high or low level triggering to match your specific logic requirements.
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2. HiLetgo 2pcs 5V One Channel Relay Module – Reliable Optocoupler Relay Module
HiLetgo 2pcs 5V One Channel Relay Module
SMD Optocoupler Isolation
Trigger Current 5mA
Human Nature Interface
AC 250V Load Rating
This module from HiLetgo is widely recognized for its genuine quality relay components and stable electrical performance. It features SMD optocoupler isolation which provides strong driving capability while keeping the control circuit safe. The 4.6 rating reflects consistent user satisfaction with its reliability in various projects.
Pros
- Genuine quality relay
- Stable performance
- Direct connection terminals
- Fault tolerant design
- Two pack value
Cons
- Limited channel count
- Basic PCB finish
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The interface design is notably convenient allowing all connections to be made directly through terminal leads. This reduces the risk of wiring errors and makes prototyping faster. The module supports both high and low level triggers so you can adapt it to different microcontroller logic levels easily.
While it offers only one channel per board the two pack included adds significant value for multi node systems. The fault-tolerant feature ensures safety by keeping the relay inactive if control signals are lost. It is a straightforward tool that avoids unnecessary complexity in your circuit design.
Best for users who need multiple isolated switching points without high cost this module is a strong contender. It works well with Arduino or PIC microcontrollers for controlling appliances. Its simplicity and safety features make it a preferred choice for many hobbyists.
Direct Terminal Access
All interfaces are available through direct connection terminals making wiring very convenient for quick prototyping sessions.
Safe Control Logic
The fault-tolerant design ensures the relay does not move if the control line breaks providing a fail-safe operation mode.
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3. SunFounder 2 Channel DC 5V Relay Module – Best Budget Relay Module
SunFounder 2 Channel DC 5V Relay Module
2 Channel Interface Board
High Current Relay
Standard Microcontroller Interface
Compact Dimensions
This expansion board is ideal for projects requiring two independent switching points on a single compact PCB. With a solid 4.6 rating it is praised for its compatibility with a wide range of microcontrollers including Arduino and Raspberry Pi. Each channel needs about 15 to 20mA of driver current ensuring efficient operation.
Pros
- Two control channels
- Clear LED indicators
- Standard connections
- Wide MCU compatibility
- Affordable price point
Cons
- Specific low trigger
- Limited to 10A load
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It comes equipped with high current relays rated for AC 250V and DC 30V loads which suits many home automation needs. The standard interface allows direct control from microcontrollers without complex interfacing circuits. LEDs clearly indicate relay output status helping you troubleshoot wiring issues quickly during development.
The size is small enough to fit in tight enclosures yet robust enough for typical loads. While it is optimized for low level triggering this works perfectly with most digital outputs. The price point makes it an excellent budget option for those needing more than one relay per board.
If you need a reliable dual channel solution that integrates easily with common dev boards this is a great pick. It balances cost and functionality effectively. We recommend it for learners and builders who value simplicity and clear status indicators.
Dual Channel Efficiency
Each relay can be controlled individually allowing you to manage two separate loads from a single board easily.
Visual Status Feedback
Indication LEDs for relay output status provide immediate visual feedback on whether the circuit is active.
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4. 5v Relay Module 5V Indicator Light LED – Simple Control Relay Module
5v Relay Module 5V Indicator Light LED
TTL Control Signal 5V
AC Load Control 220V
NO NC Contacts Available
Digital Output Compatible
This module is designed for straightforward appliance control using standard digital outputs from your development board. It features a clear 5V indicator light that shows when power is supplied making it easy to verify connections. The 4.6 rating indicates users find it reliable for basic switching tasks in various environments.
Pros
- Simple wiring process
- AC and DC support
- Indicator light included
- Appliance control ready
- Digital interface
Cons
- Single channel design
- Basic component selection
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You can use it to control DC or AC signals including 220V AC loads with safety. The presence of both normally open and normally closed contacts gives you flexibility in circuit design. Simply connect a digital output to the module and you can switch on off power demanding appliances with ease.
While it lacks advanced isolation features it is sufficient for many low voltage logic applications. The design focuses on utility allowing you to control motors or LED strips without complex wiring. It serves as a quick solution for simple prototyping where extra features are not required.
Ideal for hobbyists who need a quick way to toggle high voltage devices this module offers a hassle free experience. It works well with Arduino boards for basic automation. We suggest it for projects where simplicity and direct control are the main priorities.
Versatile Load Support
Control DC or AC signals effectively allowing the module to manage a wide range of devices from lights to motors.
Intuitive Indicator
The built in indicator light helps you quickly confirm power status and module operation at a glance.
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5. 2PCS 5V 4 Channel Relay – Versatile Multi-Channel Relay Module
2PCS 5V 4 Channel Relay
4 Isolated Channels
High Current Relay 10A
Opto Isolated Digital Input
Screwed Terminal Plate
This module provides four independent isolated channels allowing you to control multiple loads from a single board. Each relay can be switched on or off individually via opto-isolated digital inputs which keeps your microcontroller safe. The 4.3 rating reflects good performance though it may be slightly less consistent than some top picks.
Pros
- Four control points
- Individual switch capability
- Secure screw terminals
- Fault tolerant design
- Versatile jumper logic
Cons
- Slightly lower rating
- Requires more power
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It is equipped with high current relays rated for AC 250V and DC 30V loads ensuring it handles demanding tasks. The screw terminal plates and fixed bolt holes make installation secure and permanent which is great for finished projects. You can select high or low level triggers using jumpers to fit your logic needs.
While the rating is lower than others it still offers excellent value for the channel count. The fault-tolerant design adds safety by preventing movement if control lines fail. It is a practical solution for complex automation where multiple independent switches are required without separate boards.
Best for users needing extensive control capabilities this module saves space on your project enclosure. It is well suited for industrial or advanced hobbyist projects. We recommend it if you prioritize channel quantity and isolation features for your specific application.
Independent Control Channels
Each relay can individually switch on or off by an opto-isolated digital input offering flexible multi load management.
Secure Mounting Design
Equipped with screw terminal plates and fixed bolt holes on both sides for easy and stable installation.
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6. 4pcs DC 5V Relay Module 2 Channel – Robust Dual Relay Module
4pcs DC 5V Relay Module 2 Channel
2 Channel Isolated Module
Max Load AC 250V
Trigger Current 5mA
Screwed Terminal Plate
This dual channel module offers a balanced mix of safety and functionality for general automation tasks. It supports high or low level triggering giving you flexibility in how you interface with your microcontroller. The 4.4 rating indicates reliable performance across typical usage scenarios with consistent user feedback.
Pros
- High current relay
- Opto isolated inputs
- Flexible trigger mode
- Secure terminal plate
- Broad MCU support
Cons
- Moderate load rating
- Compact footprint
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Each relay is isolated via opto-couplers preventing electrical interference from affecting the control signals. It comes with high current relays capable of handling AC 250V and DC 30V loads. The screwed terminal plate and fixed bolt holes ensure a secure connection that stays stable even in vibrating environments.
While it is not the highest rated option it provides excellent value for two channels of control. The standard interface allows direct connection to a wide range of microcontrollers without adapters. It is a practical choice for projects needing independent switching of two devices.
If you need a dependable two channel solution with solid isolation this module is a strong candidate. It works well for lighting control or small motor switching. We recommend it for builders who want reliable performance without extra cost.
Opto Isolated Protection
Each relay can individually switch on or off by an opto-isolated digital input for safe control.
Robust Construction
Relay Module designed with fault-tolerant features to ensure stability and prevent accidental operation.
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7. HiLetgo 2pcs 5V 30A One Channel Relay Module – High Load Relay Module
HiLetgo 2pcs 5V 30A One Channel Relay Module
30A High Load Capacity
Multi Voltage Support
Strong Drive Capability
Optocoupler Isolation
This module is designed for high load applications where standard relays might struggle. It supports up to 30A on the contact allowing it to switch powerful motors or industrial heaters safely. The 4.6 rating shows users trust its ability to handle demanding electrical loads without failure.
Pros
- 30A contact rating
- Strong drive capability
- Multiple voltage support
- Optocoupler isolation
- Two pack included
Cons
- Single channel design
- Higher current draw
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It features optocoupler isolation which provides strong driving capability and stable performance across different conditions. The friendly interface design lets you connect terminals directly for convenient wiring. Trigger current remains low at 5mA ensuring it works well with standard logic outputs.
While it only offers one channel the high current capacity makes it valuable for specific heavy duty tasks. The ability to handle 5V 12V or 24V control signals adds versatility to your projects. It is a specialized tool for users needing robust switching power in a small form factor.
Best for high power automation tasks this module offers a reliable solution for controlling large appliances. It is ideal for industrial prototypes or heavy machinery control. We recommend it when load capacity is your top priority over channel count.
Heavy Duty Switching
Supports 30A current allowing the module to handle high power loads safely without overheating.
Stable Driving Performance
Strong drive capability ensures reliable operation even under varying voltage conditions or load requirements.
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8. ELEGOO 4 Channel DC 5V Relay Module – Best Premium Relay Module
ELEGOO 4 Channel DC 5V Relay Module
Four Independent Channels
JD-VCC Isolation Config
10 A Contact Rating
NO NC Screw Terminals
ELEGOO delivers a premium 4-channel module designed specifically for complex Arduino projects requiring multiple independent controls. Each channel uses an active-low input and has its own status LED making wiring checks and troubleshooting much easier. The 4.5 rating reflects its high build quality and clear documentation.
Pros
- Flexible input stages
- Status LEDs included
- Clear documentation
- NO NC wiring
- Quality build
Cons
- Requires JD VCC config
- Pack does not include power
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It features optocoupler-equipped input stages that separate control signals from relay drive circuitry. You can configure isolated power setups using the JD-VCC and VCC pins for added safety. Each relay is rated for up to 10A at 250V AC or 30V DC matching typical industrial standards.
The flexible NO/NC wiring allows you to choose how the circuit behaves during normal or triggered states. This level of customization is rare in budget modules and adds significant value for advanced users. While you must supply your own power it offers a clean professional look on your breadboard.
Ideal for makers who want a polished and flexible solution this module simplifies multi-load control. It is well suited for smart home or robotics projects. We recommend it as a premium choice for those who value clarity and build quality.
Opto Isolated Input Stages
Four optocouplers separate the control-input stages from the relay-drive circuitry for robust electrical isolation.
Status Indicator LEDs
Each channel has its own status LED allowing easier wiring checks and troubleshooting during development.
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9. 8 Channel Relay Module DC 5V Relay Board – Max Channel Relay Module
8 Channel Relay Module DC 5V Relay Board
8 Channel Isolated Relay
Jumper Trigger Setting
Opto Isolated Input
Max Load AC 250V
This board offers eight isolated channels allowing extensive control capabilities from a single unit. Each relay can be triggered by high or low level through jumper settings giving you full flexibility. The 4.5 rating confirms its reliability for managing multiple devices in a single setup.
Pros
- Eight isolated channels
- High current relay
- Individual switch control
- Screw terminal plate
- Standard MCU interface
Cons
- Large physical size
- Requires more power supply
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It includes high current relays rated for AC 250V and DC 30V loads ensuring safe switching of various appliances. The optical coupling isolation makes triggering more reliable and stable across different environments. Screwed terminal plates and fixed bolt holes provide a solid foundation for permanent installations.
While the board is physically larger than single channel options it consolidates wiring significantly. The standard interface connects directly with microcontrollers removing the need for extra shields. It is a powerful tool for projects requiring many independent outputs like lighting grids or motor arrays.
Best for complex automation needing many switches this board saves space and reduces wiring clutter. It is suitable for industrial monitoring or large scale smart home systems. We recommend it if maximizing channel count is your primary design goal.
Eight Independent Control Paths
This 5V Relay Module is 8 Channel Isolated, Each Relay Can Individually Switch On/Off By An Opto-Isolated Digital Input
Stable Fault Tolerant Design
This Module Design With Fault-Tolerant Even If The Control Line Breaks, The Relay Will Not Move
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10. 5V One Channel Relay Module Relay Switch – Value Pack Relay Module
5V One Channel Relay Module Relay Switch
Pack of 10 Units
Dual Indicator Lights
Insulation Optocoupler
Max Load AC 250V
This package offers ten individual relay boards providing excellent value for projects needing multiple nodes. Each unit features dual indicator lights showing both power supply and working status clearly. The 4.7 rating highlights the high quality and reliability of these compact modules.
Pros
- Great bulk value
- Dual indicator lights
- Insulation design
- Humanized interface
- Wide application range
Cons
- Single channel per unit
- Basic housing material
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The insulation design uses a patch optocoupler preventing relay switching currents from damaging your E/A port. It adopts a normally open interface with high quality relays rated for AC 250V and DC 30V loads. The humanized design includes input and output terminals for convenient wiring and setup.
While each board is single channel the pack allows you to distribute control across multiple locations. It works with all kinds of single-chip microcomputers making it versatile for different projects. This bulk option reduces the need to buy separate units later if you expand your setup.
Ideal for large scale prototyping or classroom kits this pack offers great convenience and cost savings. It is a practical choice for users needing many simple switches without complexity. We recommend it for educational purposes or wide area control networks.
Powerful Dual Indicators
Dual indicator lights include a green power indicator and a red relay status indicator for clear visual feedback.
Protection via Insulation
The relay board is insulated with a patch optocoupler to prevent damaging the E/A port from relay switching current.
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Buying Guide – How to Choose the Best 5V Relay Module
Selecting the right 5V relay module involves considering isolation, channel count, and trigger modes to ensure safety and compatibility.
Optocoupler Isolation
Optocoupler isolation is a critical safety feature that separates the low voltage control circuit from the high voltage load circuit. This prevents electrical noise or voltage spikes from the relay coil from reaching your microcontroller and causing damage. Always look for modules that explicitly state opto-isolation to protect your Arduino or Raspberry Pi.
Ensure the module uses optocouplers to isolate inputs and outputs for reliable safe operation.
Channel Count
The number of channels determines how many independent loads you can control from a single board. Single channel modules are simple and cheap while multi-channel boards like 4 or 8 channel options save space and wiring complexity. Choose based on how many devices you need to switch simultaneously.
Select a channel count that matches your project complexity to avoid using multiple boards.
Trigger Logic
Relay modules typically support High Level or Low Level triggering depending on how the input signal interacts with the relay coil. Some boards allow you to switch between these modes via a jumper which adds flexibility for different microcontroller logic levels. Check if your logic level matches the module or if it has jumper settings.
Verify the trigger logic matches your microcontroller output settings to ensure proper operation.
Load Capacity
Each relay has a maximum load rating usually specified in Amps and Volts for AC and DC circuits. Common modules handle up to 10A at 250V AC or 30V DC. Exceeding this rating can damage the relay or cause safety hazards so always check the specs against your appliance requirements.
Match the relay load rating to your appliance needs to ensure safe reliable performance.
Terminal Type
The physical connection method impacts ease of wiring and durability. Screw terminals allow for secure connections of thicker wires while pin headers are better for breadboarding. For permanent installations look for modules with robust terminals and mounting holes to secure the board.
Look for screw terminals and mounting holes for secure and durable physical connections.
Indicator LEDs
Status LEDs help you visually confirm when power is applied and when the relay is triggered. This is useful for debugging wiring issues or monitoring system status without multimeter measurements. Modules with dual LEDs for power and trigger state offer better visibility.
Choose modules with clear status LEDs to simplify troubleshooting and visual monitoring.
Fault Tolerance
A fault-tolerant design ensures the relay does not activate if the control signal is lost or the wire breaks. This safety feature prevents accidental switching which could be dangerous if connected to sensitive or high power equipment. Prioritize modules with this feature for critical applications.
Prioritize modules with fault-tolerant designs to prevent accidental operation when control fails.
Compatibility
Ensure the module voltage matches your microcontroller logic such as 5V systems. Most standard modules work well with Arduino Raspberry Pi and similar boards but always verify input voltage and current requirements. Incompatible voltage levels can damage your microcontroller or the module itself.
Verify the module voltage and current specs match your microcontroller for safe compatibility.
How to Use and Care for Your 5V Relay Module
To begin connect the relay module power pins to a stable 5V source and ground to your power supply. Then connect the input signal pin to a digital output pin on your microcontroller. Ensure you set the correct trigger mode using the jumper to match your code logic.
Connect your high voltage load to the Normally Open COM and Normally Closed terminals depending on your desired behavior. Test the circuit with low voltage first to ensure the relay clicks and the load switches correctly. Use a multimeter to verify continuity before connecting mains power.
Keep the module in a dry and cool environment to prevent corrosion or overheating. Do not exceed the rated current or voltage to avoid damaging the contacts. If using multiple modules ensure your power supply can handle the total current draw for all coils.
Frequently Asked Questions
What is a 5V Relay Module?
A 5V relay module is an electronic switching device designed to operate at 5V logic levels. It allows low voltage signals from microcontrollers to safely switch higher voltage circuits. The module typically includes an optocoupler for isolation and screw terminals for load connection.
Can I use this with 3.3V microcontrollers?
Some modules can work with 3.3V controllers but many require a 5V trigger signal for reliable switching. If your board outputs 3.3V you may need a logic level shifter to ensure the relay activates properly. Always check the datasheet for specific trigger voltage requirements before purchasing.
What is the difference between NO and NC terminals?
NO stands for Normally Open meaning the circuit is off until the relay is triggered. NC stands for Normally Closed meaning the circuit is on until the relay is triggered. COM is the common terminal that connects to either NO or NC depending on the relay state.
How much current does the module draw?
Each relay coil typically draws about 15 to 20mA when active. If using a multi-channel board calculate the total current by multiplying by the number of active channels. Ensure your 5V power supply can handle this load to avoid unstable operation.
Why is optocoupler isolation important?
Optocoupler isolation protects your microcontroller from high voltage spikes that occur when switching heavy loads. It electrically separates the control side from the load side preventing damage to sensitive ports. This safety feature is crucial for reliable long term operation.
Can I control AC motors with this module?
Yes as long as the motor voltage and current are within the relay rating usually AC 250V 10A. Always use proper wiring and safety precautions when dealing with AC mains. Verify the motor specs match the relay capacity before connecting.
Final Thoughts on Choosing the Best 5V Relay Module
Choosing the right 5V relay module depends on your specific needs for isolation, channel count, and load capacity. Our top picks highlight modules that balance safety, performance, and value for various project types. Whether you need a single switch or an 8-channel solution there is an option for every builder.
Prioritize safety features like optocoupler isolation and fault-tolerant designs to protect your electronics. Match the trigger logic and terminal types to your existing components to simplify wiring. Investing in quality components ensures your automation projects run smoothly without interruption.
Remember to check current availability and pricing before finalizing your purchase as stock levels change. Verify the specifications meet your load requirements to ensure safe operation. With the right module your control systems will be reliable and efficient for any application.