SunFounder 2 Channel DC 5V Relay Module
4.6Editor score
Compact design
Standard interface
LED status indicators
In this guide
Selecting the right 5V relay module is crucial for any electronics project involving high voltage control. These modules allow microcontrollers to safely switch AC or DC loads without direct electrical contact.
We evaluated ten popular options based on isolation quality, trigger flexibility, and build reliability. Each entry offers distinct advantages for hobbyists and professionals seeking consistent performance.
Every pick highlights key specs and real-world usability. Prices fluctuate often, so verify current listings before purchasing to ensure you get the best value for your specific setup.
Top 3 Picks for Best 5V Relay Module
4pcs DC 5V Relay Module
4.6Editor score
Optocoupler isolation
High or low trigger
Screw terminal access
ELEGOO 4 Channel DC 5V Relay Module
4.5Editor score
Four independent channels
Optocoupler equipped
Flexible NO NC wiring
Top 10 Best 5V Relay Module in 2026 Compared
The following table provides a side-by-side overview of key specifications for all ten products, helping you quickly identify the right match for your voltage and channel requirements.
ProductsSpecificationsEditor scorePrice
Editor's Choice
4pcs DC 5V Relay Module
DC 5V working voltage
AC 250V 10A load
Optocoupler isolation
High or low trigger
4.6Editor score
Editor's Choice
HiLetgo 2pcs 5V One Channel Relay Module
Genuine quality relay
SMD optocoupler
Fault-tolerant design
Human nature interface
4.6Editor score
Best Budget
SunFounder 2 Channel DC 5V Relay Module
2 Channel interface board
AC250V 10A load
Standard microcontroller interface
Indication LEDs
4.6Editor score
5v Relay Module 5V Indicator Light LED
TTL 5V 12V signal
Controls 220V AC load
Normally open contact
Appliance control module
4.6Editor score
2PCS 5V 4 Channel Relay
4 Channel isolated
10A relay switch
Opto-isolated input
Screwed terminal plate
4.3Editor score
4pcs DC 5V Relay Module 2 Channel
2 Channel 5V relay
High-Current relay
Opto-isolated digital
Fault-tolerant design
4.4Editor score
HiLetgo 2pcs 5V 30A One Channel
5V 12V 24V support
30A One Channel
Optocoupler isolation
Friendly interface design
4.6Editor score
ELEGOO 4 Channel DC 5V Relay Module
Four independent channels
Active-low input
Status LED each channel
NO COM NC terminals
4.5Editor score
8 Channel Relay Module DC 5V
8 Channel isolated module
AC 250V 10A
High or low trigger
Fixed bolt holes
4.5Editor score
5V One Channel Relay Module Pack of 10
Pack of 10 units
Dual indicator lights
Patch optocoupler
AC 250V 10A
4.7Editor score
1. 4pcs DC 5V Relay Module – Best Overall 5V Relay Module
4pcs DC 5V Relay Module
Optocoupler isolation
High or low trigger
Screw terminal access
Fault-tolerant design
This 4-pack of 5V relay modules stands out for its robust isolation and safety features. With a rating of 4.6 stars, it offers reliable switching for various microcontroller projects.
Pros
- Strong driving ability
- Stable performance
- Prevents I/O damage
- Flexible jumper setup
- Wide application range
Cons
- Requires external power for some loads
- Screw terminals can be tight
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The optocoupler isolation ensures that high currents from the relay do not damage your sensitive control boards like Arduino or Raspberry Pi. The fault-tolerant design adds an extra layer of safety if control lines break.
While it requires careful wiring for high current loads, the screw terminals provide secure connections. The ability to switch between high and low trigger levels makes it adaptable to different logic requirements.
Ideal for hobbyists needing multiple units for diverse projects, this module balances price and performance effectively. It is a top choice for anyone prioritizing safety and flexibility.
Safety First Design
The optocoupler isolates the control side from the load side, protecting your microcontroller from voltage spikes.
Flexible Trigger Options
A simple jumper lets you choose between high or low level triggers to match your logic circuit needs.
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2. HiLetgo 2pcs 5V One Channel Relay Module – Reliable Dual Pack Option
HiLetgo 2pcs 5V One Channel Relay Module
Genuine quality relay
SMD optocoupler
Fault-tolerant design
Human nature interface
HiLetgo offers a solid dual pack of single-channel relay modules that are perfect for small to medium projects. The build quality is consistent with their reputation in the maker community.
Pros
- Strong driving capability
- Stable performance
- Convenient terminals
- 5mA trigger current
- Easy installation
Cons
- Only one channel per module
- Standard size might not fit small enclosures
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Each module uses genuine quality relays and SMD optocouplers to ensure stable switching. The interface design allows for direct connection via terminals, making wiring straightforward for beginners.
While the single channel limitation might not suit complex automation needs, it is sufficient for basic on off tasks. The fault-tolerant design prevents accidental activation if the control wire is disconnected.
This option is great for users who need a few reliable modules without breaking the bank. It simplifies the process of controlling AC or DC loads safely.
High Quality Components
Using genuine relays and SMD optocouplers ensures long-term reliability during repeated switching cycles.
User Friendly Interface
All interfaces are accessible via direct connection terminals, reducing the need for soldering or complex wiring.
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3. SunFounder 2 Channel DC 5V Relay Module – Best Budget Value
SunFounder 2 Channel DC 5V Relay Module
2 Channel interface board
AC250V 10A load
Standard microcontroller interface
Indication LEDs
SunFounder delivers a budget-friendly 2-channel module that does not compromise on essential features. It is an excellent entry point for those new to relay control.
Pros
- Compact size
- Dual channel control
- Wide MCU compatibility
- Status LEDs included
- Affordable pricing
Cons
- Low level trigger fixed
- Board size may vary slightly
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The module supports a wide range of microcontrollers including Arduino and Raspberry Pi. Each channel is equipped with an LED to show the relay status clearly at a glance.
While it operates on low level trigger by default, this is often preferred in Arduino projects. The compact dimensions make it suitable for space-constrained breadboard or prototype builds.
If you need two independent relays at a low cost, this module is a top contender. It provides the necessary isolation and power handling for most hobbyist tasks.
Dual Channel Efficiency
Managing two loads with one board saves space and wiring complexity compared to two single channel modules.
Clear Visual Feedback
Indication LEDs for each relay output make troubleshooting wiring issues quick and intuitive.
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4. 5v Relay Module 5V Indicator Light LED – Simple Single Control
5v Relay Module 5V Indicator Light LED
TTL 5V 12V signal
Controls 220V AC load
Normally open contact
Appliance control module
This module is designed for simplicity, allowing direct control from microcontroller digital outputs. It is a straightforward solution for switching basic appliances.
Pros
- Simple interface
- Versatile voltage control
- Motor and LED strip support
- Digital output compatible
- Compact footprint
Cons
- Fewer safety features listed
- Basic terminal connections
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The board accepts 5V to 12V control signals, making it flexible for different logic families. It can switch AC 220V loads, which is useful for home automation projects.
It includes a normally open contact configuration that is standard for most relay applications. Users can easily control motors or LED strips with a simple digital signal.
Best for quick prototyping where advanced safety features are less critical, this module offers ease of use. It is a functional option for controlling power-demanding devices.
Broad Voltage Compatibility
Supporting control signals from 5V up to 12V allows integration with various microcontroller platforms.
Direct Device Control
Ideal for controlling motors or LED strips directly from a digital output pin without extra logic.
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5. 2PCS 5V 4 Channel Relay – High Density Switching
2PCS 5V 4 Channel Relay
4 Channel isolated
10A relay switch
Opto-isolated input
Screwed terminal plate
This 2-pack of 4-channel modules provides high-density switching for complex automation tasks. It allows you to control many devices from a single microcontroller setup.
Pros
- Multiple channels per pack
- Reliable optical isolation
- Easy installation bolts
- Flexible input logic
- Secure terminal connections
Cons
- Lower rating than single channel
- Larger board size
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Each relay is opto-isolated to protect the control system from load spikes. The fault-tolerant design ensures safety even if control lines are accidentally broken during wiring.
Screwed terminal plates and bolt holes make physical installation secure and vibration-resistant. The jumper settings allow you to reverse input logic easily for different circuit designs.
For projects requiring many control points, this module offers a cost-effective solution. It balances channel count with reliability for demanding industrial or hobby applications.
High Channel Density
Controlling four independent loads on one board saves significant space in large scale projects.
Secure Mechanical Mounting
Fixed bolt holes on both sides ensure the module stays firmly in place during operation.
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6. 4pcs DC 5V Relay Module 2 Channel – Bulk Multi-Channel Option
4pcs DC 5V Relay Module 2 Channel
2 Channel 5V relay
High-Current relay
Opto-isolated digital
Fault-tolerant design
Buying four 2-channel modules offers excellent value for larger deployments. This bulk pack ensures you have enough relays for extensive project lists without frequent reordering.
Pros
- Value of four units
- Two independent relays
- Optical coupling isolation
- Standard MCU interface
- Reliable triggering
Cons
- Larger bulk packaging
- More complex wiring
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Each module features high-current relays capable of handling typical household loads safely. The opto-isolated digital inputs provide reliable switching without risking damage to the controller.
The fault-tolerant design adds peace of mind by preventing activation if control wires are severed. Standard interfaces make it easy to connect with various microcontrollers directly.
This is a strategic purchase for labs or classrooms where multiple setups are needed. It provides a balanced mix of channel count and reliability for group projects.
Bulk Efficiency
Four units in a pack reduce per-unit costs and ensure availability for multiple setups.
Independent Channel Control
Each of the two relays can be switched on or off individually for precise control.
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7. HiLetgo 2pcs 5V 30A One Channel – High Current Specialist
HiLetgo 2pcs 5V 30A One Channel
5V 12V 24V support
30A One Channel
Optocoupler isolation
Friendly interface design
This module stands out for its ability to handle significantly higher currents than standard options. It is designed for heavy-duty applications where 10A is not enough.
Pros
- Handles 30A load
- Supports higher voltage
- Strong drive capability
- Easy direct connection
- Stable performance
Cons
- Physically larger module
- Higher power requirement
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With a 30A rating, it can switch larger motors or high-power AC loads safely. The isolation ensures your control circuit remains protected even under high current stress.
The interface is designed for convenience, allowing direct terminal connections for quick setup. It accepts various control voltages including 5V 12V and 24V for flexibility.
Best for industrial or automotive projects requiring robust switching, this relay is a solid investment. It provides the extra capacity needed for demanding electrical loads.
High Current Capacity
A 30A rating allows switching of heavy machinery or large appliances that exceed standard limits.
Multiple Control Voltages
Supporting 5V 12V and 24V inputs makes it versatile for various power and logic systems.
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8. ELEGOO 4 Channel DC 5V Relay Module – Top Quality Kit
ELEGOO 4 Channel DC 5V Relay Module
Four independent channels
Active-low input
Status LED each channel
NO COM NC terminals
ELEGOO is known for quality educational kits, and this 4-channel module reflects that standard. It offers professional features in a package designed for ease of use.
Pros
- High-quality construction
- Four independent relays
- Clear status LEDs
- Flexible wiring options
- Trusted brand reputation
Cons
- Slightly higher price
- Active-low logic only
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Each of the four channels has its own optocoupler and status LED for clear troubleshooting. The NC and NO screw terminals allow flexible wiring configurations for different circuit needs.
While it uses active-low input which may require logic adjustment for some users, it simplifies common microcontroller designs. The robust build ensures long-term reliability in demanding environments.
For those valuing brand trust and detailed documentation, this module is a premium choice. It is perfect for advanced students or professionals needing precise control.
Independent Channel Status
Status LEDs for each channel help quickly identify which relay is active during debugging.
Flexible Terminal Wiring
NO COM NC terminals allow you to configure circuits as normally open or normally closed easily.
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9. 8 Channel Relay Module DC 5V – Maximum Control Points
8 Channel Relay Module DC 5V
8 Channel isolated module
AC 250V 10A
High or low trigger
Fixed bolt holes
This module offers the highest channel count in our list, making it ideal for complex automation systems. It allows control of eight separate loads from one interface.
Pros
- Maximum channel count
- Fully isolated channels
- Flexible trigger settings
- Secure mounting points
- Direct MCU connection
Cons
- Large footprint required
- Complex logic planning
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All eight channels are opto-isolated to ensure safety and stability. The jumper settings allow you to choose high or low level triggers to match your specific logic requirements.
Fixed bolt holes provide secure mounting options which are essential for larger boards in vibration-prone environments. Direct connection to microcontrollers is straightforward with standard headers.
If your project requires controlling many devices simultaneously, this board is the ultimate solution. It simplifies the wiring and logic needed for multi-output systems.
High Channel Capacity
Eight independent channels provide extensive control without needing multiple smaller modules.
Logic Flexibility
Jumpers allow you to customize the trigger logic for each channel to fit your code.
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10. 5V One Channel Relay Module Pack of 10 – Bulk Supply Solution
5V One Channel Relay Module Pack of 10
Pack of 10 units
Dual indicator lights
Patch optocoupler
AC 250V 10A
This pack of ten single channel modules offers the highest rating in our review, reflecting consistent customer satisfaction. It is an excellent stock for workshops or frequent builders.
Pros
- Highest rating
- Ten units included
- Clear indicator lights
- Patch optocoupler
- Wide application range
Cons
- Single channel limit
- Higher initial cost
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Dual indicator lights clearly show power and relay status, making it easy to debug issues at a glance. The patch optocoupler ensures reliable insulation and prevents damage to control ports.
While the single channel design limits complex setups, it provides simplicity and reliability for basic control needs. The 10A rating is sufficient for most common loads and appliances.
For those who need a bulk supply of reliable modules, this pack is the safest bet. It ensures you always have a spare module ready for future projects.
Clear Visual Status
Dual indicator lights show power and relay status distinctly for quick visual checks.
Reliable Insulation
Patch optocoupler technology provides consistent isolation to protect your controller effectively.
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Buying Guide – How to Choose the Best 5V Relay Module
Selecting the right module depends on your specific load requirements and microcontroller compatibility. Below are key factors to consider before making a purchase.
Channel Count
Consider how many devices you need to control simultaneously. Single channel modules are simple, but multi-channel boards save space and wiring time for complex setups.
Choose a board with enough channels for your current and future needs to avoid replacing units later.
Optocoupler Isolation
Always ensure the module has optocoupler isolation. This protects your microcontroller from high voltage spikes generated by the relay switching loads.
Optical isolation is essential for safe operation, especially when working with AC mains or higher voltage DC loads.
Trigger Logic
Check if the module supports high or low level triggers. Some boards let you switch between them using a jumper for compatibility with different logic circuits.
Ensure the trigger logic matches your microcontroller output requirements to prevent wiring errors.
Load Ratings
Verify the maximum current and voltage the relay can handle. Standard modules handle 10A at 250V AC, but high-power needs may require 30A rated units.
Exceeding ratings can lead to failure or safety hazards, so match the relay to your load specifications.
Terminal Type
Screw terminals are generally more reliable than solder pins for high current applications. They provide secure connections and allow for easy wire changes.
Look for modules with robust terminal blocks to ensure safe and lasting connections.
Mounting Options
Consider the physical size and mounting features of the board. Fixed bolt holes or secure mounting points are important for installations subject to vibration.
Ensure the board fits your enclosure and mounting needs to prevent mechanical stress.
Indicator Lights
LED indicators for power and relay status help in troubleshooting and monitoring. Having visual feedback simplifies debugging during the development phase.
Modules with clear LEDs save time by showing the state of the circuit instantly.
Brand and Quality
Reputable brands often provide better quality control and documentation. This can be crucial for complex projects or educational environments.
Invest in trusted brands to ensure reliability and access to support if issues arise.
How to Use and Care for Your 5V Relay Module
Start by connecting the VCC and GND pins to your 5V power source. Ensure the ground is shared with your microcontroller for correct signal reference.
Wire the control signal to the IN pin and connect your load to the COM and NO or NC terminals. Do not exceed the rated current to prevent overheating.
Test with a multimeter before connecting high voltage loads to verify the switching action. Regularly check terminals for tightness to ensure consistent performance over time.
Frequently Asked Questions
Can I use a 5V relay module with a 3.3V microcontroller?
Many modules support 5V input, but some logic inputs can accept 3.3V. Check the datasheet or test the pin voltage to ensure reliable activation without damage.
What is the difference between NO and NC terminals?
NO stands for Normally Open which means the circuit is open until the relay activates. NC stands for Normally Closed which means the circuit is closed until the relay activates.
Do I need a separate power supply for the relay module?
Yes, you typically need a separate supply for the relay coil to prevent voltage drops on your microcontroller. Use a common ground between the two supplies.
How many amps can a standard 5V relay handle?
Most standard 5V relay modules are rated for 10A at 250V AC or 30V DC. Always check the label on your specific module for accurate ratings.
Why is my relay clicking but not switching?
This may be due to insufficient current for the relay coil or loose wiring. Ensure your power supply can deliver the required current and check all connections.
Can I stack multiple relay modules together?
Yes, you can stack modules if you have enough GPIO pins on your microcontroller. Ensure each has adequate power and secure mounting to prevent shorts.
Final Thoughts on Choosing the Best 5V Relay Module
Our top picks include the 4pcs DC 5V Relay Module for overall balance, the SunFounder 2 Channel for budget needs, and the ELEGOO 4 Channel for quality.
Prioritize safety features like optocoupler isolation and correct load ratings for your application. The right module ensures reliable control and protects your components.
Always verify current pricing and availability before buying. Prices can vary, so checking the latest listings helps you secure the best deal for your project.