10 Best Ethernet Relay Module in 2026

Ethernet Relay Modules provide robust control for industrial automation and smart systems. They allow remote switching of devices via network connections, offering stability and precision. Choosing the right one depends on your specific protocol needs and power requirements for safe operation.

We evaluated ten top-rated modules based on protocol support, channel count, isolation features, and user feedback. Our comparison highlights key differences in connectivity options like Modbus or PoE. This list covers diverse use cases from home automation to heavy industrial control tasks.

Each pick shows detailed specs and real-world performance insights to help you decide. Prices fluctuate often, so verify current costs before purchasing. Focus on reliability and compatibility with your existing infrastructure for long-term success in your projects.

Top 3 Picks for Best Ethernet Relay Module

Top 10 Best Ethernet Relay Module in 2026 Compared

This side-by-side comparison details the core specifications of all ten selected Ethernet Relay Modules. It helps you quickly identify which model fits your channel count, protocol, and power needs without reading full reviews.

1. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Best Overall Ethernet Relay Module

4.8Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 Dual-Core Processor

Up to 240MHz Speed

Integrated Wi-Fi Bluetooth LE

Contact Rating 10A 250VAC

This industrial 8-channel module stands out with its robust ESP32-S3 microcontroller and versatile connectivity options. It holds an impressive 4.8 rating from users who value its reliability and advanced features like PoE and RS485 support. The device is built for demanding environments where stable network control is essential for operational success.

Pros

• High performance microcontroller
• Multiple communication protocols
• Strong isolation protection
• Direct appliance control

Cons

• Higher price point
• Complex setup needed

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Key strengths include its dual-core LX7 processor running at 240MHz which ensures fast command processing. The onboard digital inputs support both passive and active contacts with bi-directional optocoupler isolation for safety. It can directly switch 220VAC home appliances or low voltage devices up to 30V DC safely.

Trade-offs involve the higher cost compared to basic modules and the need for technical knowledge to configure Arduino IDE resources. These are acceptable given the superior performance and flexible wireless connectivity it offers. Users seeking advanced automation will find the investment worthwhile for long-term efficiency.

Buy this if you need a powerful, future-proof relay for smart home or industrial projects requiring Wi-Fi or Ethernet. It is ideal for developers using Arduino IDE or those needing RS485 integration. The comprehensive SDK and support make it a top choice for serious control applications.

Advanced Wireless Connectivity

Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode communication allows flexible remote control options.

Robust Industrial Safety

Built-in isolation protection circuits ensure safe operation when controlling high-voltage AC devices.

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2. Waveshare 8-Ch Ethernet Relay Module (B) – Best Premium Ethernet Relay Module

4.9Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module (B)

Modbus RTU TCP Protocol

IEEE 802.3af PoE

Bi-Directional Isolation

Web Browser Configuration

With a near perfect 4.9 rating, this module excels in reliability and protocol versatility for industrial control. It features robust isolation and a wide power range supporting PoE for simplified wiring setups. Users praise its stability and ease of web browser configuration for quick setup.

Pros

• Highest user ratings
• Multiple config modes
• Wide power input
• Strong isolation circuits

Cons

• Requires specific protocols
• Learning curve for Modbus

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It supports TCP server client and UDP modes allowing flexible integration into existing network infrastructures. The digital inputs handle both dry and wet contacts safely with optocoupler isolation. This ensures high voltage circuits do not interfere with low voltage control signals.

The downside is the requirement to understand Modbus commands for optimal use which may challenge beginners. However the detailed docs and flexible modes make it manageable for experienced users. The premium features justify the cost for critical systems requiring precise data exchange.

Choose this for industrial setups needing reliable Modbus communication and PoE power. It suits engineers who need web configuration and strong isolation for safety. Its proven track record makes it a safe bet for high-stakes automation tasks.

Flexible Network Modes

Supports TCP Server Client UDP Multicast HTTP and MQTT for diverse system integrations.

Simplified Power Setup

PoE compliance allows network and power delivery over a single cable reducing wiring.

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3. Pinhaijing LAN Ethernet 2 Way Relay Board – Best Budget Ethernet Relay Module

4.8Editor scoreCheck price on Amazon

Pinhaijing LAN Ethernet 2 Way Relay Board

STC Microcontroller Chip

TCP UDP Controller

Web Server Enabled

Compact PCB Design

This affordable module offers essential remote switching via web interface for simple home or office projects. It holds a strong 4.8 rating thanks to its reliable STC microcontroller and password protected cloud access. It is a practical entry point for those needing basic LAN control.

Pros

• Low cost option
• Web browser control
• Password protection
• Compact footprint

Cons

• Only 2 channels
• Basic industrial features

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The built-in web server allows you to control relays from any browser without extra apps. It supports 5V or 9-24V inputs providing flexible power options for different setups. The military grade PCB material ensures durability despite its small size and price.

Its main limitation is the 2 channel count which limits expansion for larger systems. Basic safety isolation might not suit heavy industrial applications compared to premium models. However for light duty tasks it delivers excellent value and consistent performance.

Buy this if you need a cheap reliable relay for simple lighting or appliance control. It works well for DIY enthusiasts wanting a web interface without complexity. The password protection adds a necessary layer of security for network devices.

Easy Browser Control

Web server interface enables direct control from any network connected browser.

Secure Access

Local password protection keeps unauthorized access away from your control panel.

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4. 8-CH Ethernet Relay Module – Solid Modbus Ethernet Relay Module

3.4Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

8 Channel Relay

Modbus RTU TCP

PoE Power Supply

ABS Rail-Mount Case

This module provides a straightforward industrial solution for eight relay channels via Ethernet. It supports Modbus protocols and PoE making it versatile for standard automation needs. Users note it is easy to use though the rating suggests some variability in performance.

Pros

• Wide power input range
• PoE support
• Flash on-off function
• Standard industrial case

Cons

• Lower user ratings
• Basic feature set

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Features include flash-on and flash-off functions for timed control without extra coding. The optocoupler isolation protects against high voltage interference ensuring safe operation. The ABS rail-mount case simplifies installation in control panels or cabinets.

The lower rating implies potential connectivity or stability issues reported by some users. It may lack advanced protocols like MQTT found in cost models. However for simple Modbus applications it remains a cost-effective choice with essential protections.

Select this for basic industrial control where Modbus is standard. It is suitable for projects needing a rail-mount design and PoE power. Verify compatibility with your controller before purchase to avoid integration issues.

Timed Control Options

Flash functions allow automatic relay cycling for brief periods without software.

Stable Power Options

Supports DC 7 to 36V input and PoE for flexible power distribution.

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5. Waveshare 8-Ch Ethernet Relay Module – Reliable Industrial Ethernet Relay Module

4.1Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module

8 Channel Design

PoE Port

Optocoupler Isolation

4 Network Indicators

Waveshare delivers a reliable 8-channel module with strong isolation and clear status indicators. It supports Modbus and PoE for straightforward industrial automation setups. Users appreciate the rail-mount design and robust protection circuits for safety.

Pros

• Industrial grade case
• Clear LED indicators
• PoE support
• Solid protection

Cons

• Limited protocol range
• Basic configuration

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The network indicators help troubleshoot signal status quickly during installation. It includes flash-on and flash-off functions for flexible timing control. The optocoupler isolation prevents high voltage interference from affecting the MCU.

Compared to advanced models it lacks MQTT or wireless options. Configuration is basic which may limit complex system integration. Yet for wired Modbus networks it offers consistent performance at a fair price.

Use this for standard industrial control where reliability and ease of installation matter. It suits technicians needing visible status LEDs and PoE power. It is a solid mid-range option for stable automation tasks.

Visual Status Monitoring

Four LEDs indicate MCU and signal transceiving status for easy debugging.

Protective Design

Reverse-proof circuit protects against accidental incorrect connections.

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6. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Advanced Wireless Ethernet Relay Module

4.6Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 Core

Wi-Fi Bluetooth LE

RS485 Interface

10A Relay Rating

This module offers advanced wireless control with ESP32-S3 and RS485 for diverse automation. It holds a 4.6 rating for its reliable performance and robust SDK support. Users value the combination of Ethernet and wireless flexibility for remote projects.

Pros

• Strong wireless options
• Arduino IDE support
• High rating
• Isolation circuits

Cons

• Higher power needs
• Complex setup

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It supports passive and active digital inputs with optocoupler isolation for safety. The contact rating allows direct control of home appliances or low voltage devices. Documentation and tutorials simplify the development process for hobbyists and pros.

The setup requires technical knowledge which may deter non-technical users. Power needs are higher than simple modules. Yet the versatility justifies the complexity for smart home or IoT integrations.

Choose this for projects needing wireless and wired connectivity together. It is ideal for those using Arduino IDE for custom automation. The strong support ensures you can build complex systems with confidence.

Comprehensive Development Support

SDK tutorials and technical help streamline custom project development.

Dual-Mode Wireless

Integrated Wi-Fi and Bluetooth LE enable versatile remote access.

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7. Waveshare 30-Ch Ethernet Relay Module – High Channel Ethernet Relay Module

4.2Editor scoreCheck price on Amazon

Waveshare 30-Ch Ethernet Relay Module

30 Relay Channels

Modbus RTU TCP

PoE Power

Dedicated Driver Chip

With thirty channels this module handles large scale industrial and farming control efficiently. It holds a 4.2 rating for its stability and ease of use in high demand setups. The dedicated driver chip ensures stable power for all relays simultaneously.

Pros

• High channel count
• Strong driving ability
• Industrial grade case
• PoE support

Cons

• Expensive
• Large physical size

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Features like flash-on and flash-off simplify timing tasks without external controllers. The optocoupler isolation and flyback diodes protect against electrical noise. Rail-mount design fits standard DIN rails for organized installation.

It costs more than smaller units and takes up significant panel space. It is overkill for small projects needing only a few channels. But for agriculture or factory automation it provides unmatched channel density.

Buy this for large projects needing many control points in one unit. It suits farmers or engineers managing complex systems. The reliable driver ensures all thirty channels operate smoothly without flicker.

Scalable Control

Thirty channels allow control of numerous devices from a single module.

Robust Protection

Flyback diode and isolation circuits protect against voltage spikes.

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8. Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module – High Performance Ethernet Relay Module

4.7Editor scoreCheck price on Amazon

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module

Xtensa Dual-Core CPU

240MHz Clock Speed

RTC Chip

PoE Optional

This module combines high performance with industrial safety for demanding tasks. It holds a 4.7 rating for its powerful processor and detailed documentation. The RTC chip enables scheduled tasks without constant external monitoring.

Pros

• Fast processor
• RTC for scheduling
• High rating
• Wiki resources

Cons

• PoE varies by version
• Higher price

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Its 240MHz clock ensures fast response times for time-sensitive automation. USB Type-C simplifies firmware updates and debugging. The isolated RS485 interface connects to sensors or other industrial modules reliably.

PoE availability depends on specific version which requires checking before buying. Price is high compared to basic units. Yet the speed and resources make it worth it for complex smart projects.

Choose this when processing speed and scheduling are critical. It suits developers needing detailed resources and reliable RS485. The strong build quality ensures it performs under continuous industrial load.

Scheduled Automation

RTC chip allows device to run tasks at set times automatically.

Easy Debugging

USB Type-C port simplifies power and firmware updates.

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9. Waveshare 8-Ch Ethernet Relay Module (B) – Versatile Ethernet Relay Module

4.2Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module (B)

Modbus TCP RTU

Debouncing Algorithm

Linkage Control

4 Network Indicators

This module stands out with linkage control and debouncing for stable inputs. It holds a 4.2 rating for its flexible features and safety circuits. Users like how digital inputs can trigger relays automatically without extra code.

Pros

• Linkage control
• Debouncing logic
• Flash functions
• Rail-mount case

Cons

• Setup complexity
• Mid-range price

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The debouncing algorithm filters noise from sensors for cleaner signals. Flash-on and flash-off functions help with automated sequences. Isolation prevents high voltage spikes from damaging the control logic.

It may require careful setup for linkage logic which adds complexity. It is not the cheapest option on the market. However these features save time in advanced automation scenarios.

Use this for projects needing automated input-to-output logic. It suits industrial setups where sensor noise is common. The flexible design allows tailored control strategies for specific tasks.

Smart Input Logic

Digital inputs can directly control relays using linkage settings.

Noise Filtering

Built-in debouncing removes false signals from sensors.

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10. 8-CH Ethernet Relay Module – Standard Modbus Ethernet Relay Module

4.0Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

Modbus TCP Server

PoE Compliant

Web Configuration

Optocoupler Isolation

This standard module offers essential Modbus and PoE features for general control. It holds a 4.0 rating for its balanced features and ease of web configuration. Users find it suitable for basic automation where complex protocols are not needed.

Pros

• Multiple protocols
• Web browser setup
• PoE power
• Standard rails

Cons

• Average features
• Variable reliability

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It supports DHCP and DNS for flexible network addressing. Flash functions provide simple timing control. Optocoupler isolation protects the unit from electrical interference.

It lacks advanced options like RS485 or Wi-Fi found in higher end models. Reliability is average compared to premium brands. But for simple tasks it delivers decent value.

Choose this for standard control needing basic web or Modbus access. It works well for simple industrial panels or hobby setups. Verify current stock for consistent performance before buying.

Flexible Addressing

Obtains dynamic IP via DHCP for easy network connection.

Web Access

Web browser configuration simplifies setup without extra software.

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Buying Guide – How to Choose the Best Ethernet Relay Module

Selecting the right Ethernet Relay Module requires understanding your specific connectivity and safety needs. This guide breaks down the key factors to ensure you choose a device that fits your environment.

Communication Protocol

Most modules support Modbus RTU or TCP which are industry standards for automation. Ensure your system can communicate with these protocols. Some offer HTTP or MQTT which are better for cloud based smart home systems.

Check your existing infrastructure before buying to avoid costly adapters.

Channel Count

Modules range from 2 to 30 channels. Pick a count that matches your current and future needs. Too few channels require multiple units while too many waste budget and space.

A 8-channel unit is the most versatile for general projects.

Power Supply

Look for wide input ranges like 7 to 36V DC. PoE support simplifies installation by combining power and data in one cable. Ensure the power source matches the module specifications.

PoE is ideal for hard to reach locations.

Isolation and Safety

Optocoupler isolation is vital for protecting low voltage logic from high voltage spikes. Modules with reverse-proof circuits prevent damage from wiring errors. Always verify contact ratings like 10A 250VAC.

Never skip isolation features for industrial or appliance control.

Digital Input Support

Some modules include digital inputs for sensors. Support for both dry and wet contacts increases flexibility. Bi-directional isolation ensures inputs do not interfere with outputs.

Useful if you want automated triggers without external controllers.

Ease of Configuration

Web browser interfaces simplify setup for non coders. Others require Arduino IDE or specific software. Check if the vendor provides clear guides or SDKs.

Easy configuration saves time and frustration.

Physical Design

Rail-mount cases fit standard control panels. LEDs for status monitoring help troubleshooting. Size matters for crowded enclosures.

Pick a case that matches your mounting space.

Brand Support

Established brands like Waveshare offer better documentation and warranty. Check online resources or wikis for help. Good support is crucial for long-term reliability.

Always verify vendor responsiveness before purchase.

How to Use and Care for Your Ethernet Relay Module

First install the module in a dry and ventilated area to prevent overheating. Connect the Ethernet cable and power source according to the terminal labels. If using PoE ensure your switch supports IEEE 802.3af standard.

Second configure the IP address using the vendor tool or web browser. Test each relay channel individually with a low voltage load. Set up protocols like Modbus or MQTT to link with your controller.

Third inspect connections regularly for tightness and signs of wear. Keep the case clean from dust to maintain airflow. Avoid touching the relay contacts directly to prevent corrosion or damage.

Frequently Asked Questions

Final Thoughts on Choosing the Best Ethernet Relay Module

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