10 Best Ethernet Relay Module in 2026

Ethernet relay modules provide reliable remote control for industrial and home automation systems. These devices allow you to manage electrical loads securely over a network using standard protocols like Modbus TCP or MQTT.

We evaluated ten top-rated models based on connectivity options, isolation features, power input flexibility, and ease of configuration. Our analysis focuses on performance stability and compatibility with common automation platforms.

Each pick highlights key specifications and real-world use cases to help you find the right fit. Note that product availability and pricing may change over time so verify details before purchasing.

Top 3 Picks for Best Ethernet Relay Module

Top 10 Best Ethernet Relay Module in 2026 Compared

The following table presents a side-by-side comparison of all ten models evaluated in this guide. Use this overview to quickly identify key specifications such as channel count, protocol support, and power options.

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 microcontroller

240MHz dual core

WiFi Bluetooth LE

PoE power supply

This industrial module stands out with its ESP32-S3 microcontroller delivering robust performance. Rated highly by users it combines Ethernet PoE WiFi and Bluetooth into one compact device.

Pros

• High performance processor
• Versatile connectivity options
• Multiple isolation circuits
• Digital input support
• PoE capability

Cons

• Higher price point
• Complex setup required

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It features onboard digital inputs and RS485 alongside Ethernet which makes it ideal for complex automation tasks. The isolation circuits ensure safe operation when handling high voltage loads.

While the feature set is extensive it may require more configuration time than simpler modules. The learning curve is justified for projects needing wireless and wired flexibility.

Recommended for professionals or advanced hobbyists needing scalable industrial grade solutions. Its versatility supports a wide range of smart home and factory automation applications.

Advanced Wireless Connectivity

Integrated 2.4GHz Wi-Fi and Bluetooth LE allows remote control without cabling constraints.

Robust Industrial Design

Multiple isolation protections including power and optocoupler isolation safeguard against interference.

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2. Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module – Premium Ethernet Relay Module

4.7Editor scoreCheck price on Amazon

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module

Xtensa 32-bit processor

Isolated RS485

PoE support

Wide voltage input

This model offers premium features like isolated RS485 and a robust processor for demanding tasks. It is designed for industrial environments where reliability is critical.

Pros

• Dedicated isolation
• Strong documentation
• Multiple interface options
• High performance
• USB Type-C port

Cons

• Premium pricing
• Requires wiring knowledge

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The comprehensive wiki resources simplify development and troubleshooting. Users benefit from stable connectivity through multiple protocols and power options.

It is more expensive than basic modules but the build quality and support justify the investment. Ideal for projects requiring long term stability.

Choose this for professional deployments needing extensive isolation and documentation. It excels in scenarios where communication integrity cannot be compromised.

Reliable Industrial Interfaces

Isolated RS485 enables safe connection to Modbus sensors and other industrial equipment.

Development Support

Official wiki and SDK resources streamline programming and maintenance tasks.

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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

2 Channel relays

TCP UDP protocol

Web server

Compact size

This budget friendly option provides essential Ethernet relay control at a low cost. It supports TCP UDP and includes a web interface for local management.

Pros

• Affordable price
• Simple setup
• Compact design
• Local password security
• Low power use

Cons

• Fewer channels
• Basic interface

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Its compact size fits easily in small enclosures. Security features like password protection ensure safe access to controls.

Limited channel count restricts large scale use but it suits simple tasks well. The build quality is decent for the price.

Best for hobbyists or small projects needing reliable remote switching. It delivers core functionality without unnecessary complexity.

Simple Local Control

Built-in web server allows browser-based configuration without extra software.

Compact Footprint

Small PCB dimensions save space in confined installation areas.

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

4.1Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module

8 Channel relays

Modbus protocol

PoE port

Optocoupler isolation

This module focuses on stability with industrial grade components and rail mount casing. It supports Modbus and PoE for streamlined integration.

Pros

• Rail mount design
• PoE capability
• Relay protection circuits
• Modbus support
• Status LEDs

Cons

• Basic features
• Limited docs

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Isolation circuits prevent interference from high voltage circuits. Network indicators help monitor connection status easily.

Setup is straightforward but lacks advanced configuration options. It is a solid choice for standard applications.

Suitable for users needing dependable relay control without extras. Its design prioritizes durability and simplicity.

Industrial Grade Housing

ABS rail-mount case ensures secure installation in standard DIN racks.

Network Monitoring

LED indicators provide visual feedback on signal transceiving and MCU status.

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5. 8-CH Ethernet Relay Module – Standard Ethernet Relay Module

3.4Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

8 Channel relays

Modbus RTU TCP

PoE support

Rail mount case

A versatile module supporting Modbus and MQTT for diverse automation needs. It allows temporary relay activation via command arguments.

Pros

• Wide power input
• MQTT support
• Flash function
• Reversed protection

Cons

• Lower rating
• Basic configuration

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Power flexibility includes PoE and wide voltage inputs. Optocoupler isolation protects sensitive components effectively.

Lower user ratings suggest some setup challenges. However core functions perform reliably once configured.

Good for projects prioritizing protocol variety over ease of use. Verify compatibility before purchase.

Flexible Timing Control

Flash-on and flash-off functions enable automatic relay cycling for testing.

Multiple Power Sources

Supports direct DC input or PoE for simplified cabling in remote locations.

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

4.6Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 processor

WiFi Bluetooth dual

Ethernet port

Multiple isolations

Powered by ESP32-S3 this module handles complex tasks with ease. It supports both wired Ethernet and wireless connectivity.

Pros

• High performance CPU
• Wireless options
• Digital input
• Reliable isolation
• Developer resources

Cons

• Complex firmware
• Higher cost

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Extensive isolation ensures safety in mixed voltage environments. SDK resources assist developers in customizing operations.

Configuration may require technical expertise. However the performance and flexibility are strong.

Recommended for developers needing a balance of power and versatility. It fits advanced IoT projects well.

Dual Mode Wireless

Bluetooth LE and Wi-Fi enable flexible remote access options.

Developer Friendly

Comprehensive SDK and tutorials accelerate project implementation.

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7. 8-CH Ethernet Relay Module (B) – Feature Rich Ethernet Relay Module

4.9Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module (B)

8 digital inputs

Multiple protocols

Web configuration

PoE compliant

This model adds digital inputs alongside relays for enhanced monitoring. It supports UDP HTTP and MQTT for flexible integration.

Pros

• Digital input support
• Wide protocol list
• Browser config
• Strong isolation
• High rating

Cons

• Advanced setup
• Multiple options

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Web browser configuration simplifies network setup. High ratings reflect user satisfaction with reliability.

The range of options can be overwhelming initially. But it offers great value for adaptable systems.

Ideal for users needing both input and output management. Its high rating confirms consistent performance.

Unified Input Output

Integrated digital inputs allow monitoring of switches and sensors alongside relay control.

Web Interface

Direct web configuration eliminates need for proprietary software tools.

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

4.2Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module (B)

Digital inputs

Modbus support

PoE comms

Debounce algorithm

Features digital inputs with debouncing for clean signal processing. Linkage control allows automatic relay changes based on input.

Pros

• Debounce logic
• Linkage control
• Stable drivers
• Rail mount
• MQTT support

Cons

• Average rating
• Complex wiring

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Dedicated drivers enhance stability. Rail mount design fits standard industrial enclosures.

Average ratings indicate variability in user experience. Quality control is generally good.

Choose for environments needing input based automation logic. It bridges simple and complex needs.

Input Driven Automation

Linkage control enables automatic relay toggling based on sensor inputs.

Signal Processing

Built-in debouncing algorithms filter noise from mechanical switches.

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9. 8-CH Ethernet Relay Module – Dependable Ethernet Relay Module

4.0Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

8 Channel relays

Modbus TCP

PoE supply

Web config

Supports DNS and DHCP for easy network integration. Web configuration simplifies initial setup tasks.

Pros

• DNS support
• DHCP support
• Multiple protocols
• Isolation

Cons

• Mid-range rating
• Setup variability

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Multiple communication modes provide flexibility. Optocoupler isolation protects against surges.

Ratings suggest occasional configuration issues. However reliability is acceptable for most uses.

Suitable for standard industrial applications requiring network control. Verify protocol needs before buying.

Network Ease

DHCP and DNS support streamline integration into existing networks.

Protocol Versatility

Supports TCP UDP HTTP and MQTT for varied integration scenarios.

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10. Waveshare 30-Ch Ethernet Relay Module – High Capacity Ethernet Relay Module

4.2Editor scoreCheck price on Amazon

Waveshare 30-Ch Ethernet Relay Module

30 Channel relays

Modbus protocol

PoE support

Rail mount case

Designed for large scale automation needing many independent channels. It supports Modbus and PoE for robust networking.

Pros

• High channel count
• Industrial use
• Stable control
• Flash functions

Cons

• Larger size
• Higher power

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Flash functions enable temporary activation cycles. LED indicators track status clearly.

Bulkier due to channel count. Power needs may require separate sources.

Best for agricultural or industrial settings needing wide control. It scales well for complex systems.

Scalable Capacity

Thirty channels allow extensive device control in a single unit.

Agriculture Ready

Suitable for smart farming setups requiring numerous pump or valve controls.

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Buying Guide – How to Choose the Best Ethernet Relay Module

Selecting the right Ethernet relay module depends on your specific automation requirements. Consider channel count, protocols, power options, and build quality.

Channel Count and Capacity

Channel count determines how many devices you can control simultaneously. For small home projects two to eight channels suffice. Larger industrial setups may need thirty or more channels for comprehensive control.

Choose a module with enough channels to avoid overloading or needing multiple units.

Communication Protocols

Protocols like Modbus TCP MQTT HTTP allow integration with different software. Modbus is standard for industrial equipment while MQTT suits IoT platforms.

Ensure the module supports the protocol your control system requires for seamless operation.

Power Supply Options

Power options include PoE which delivers power and data via one cable or wide voltage inputs. PoE simplifies installation in remote locations.

Verify voltage compatibility with your system to prevent damage or instability.

Isolation and Protection

Isolation prevents high voltage from affecting sensitive electronics. Optocoupler isolation is standard for safety. Protection circuits guard against reverse polarity.

Select modules with strong isolation for handling high power loads safely.

Build Quality and Mounting

Industrial modules often use rail-mount cases for secure installation. Quality PCB materials ensure longevity in demanding environments.

Check enclosure type and material to match your installation constraints.

Connectivity Flexibility

Modules may offer Ethernet plus wireless options like WiFi or Bluetooth. This flexibility allows remote access without extra hardware.

Consider if wireless backup or control adds value to your project.

Input and Output Support

Some units include digital inputs for sensors alongside relay outputs. This combines monitoring and control in one device.

Look for input support if you need feedback alongside switching.

Configuration and Usability

Web interfaces or software tools simplify setup. Documentation quality affects how easy it is to customize.

Prioritize user-friendly configuration if you lack technical expertise.

How to Use and Care for Your Ethernet Relay Module

Begin by connecting the Ethernet port to your network and configuring IP settings via web interface or software. Ensure power input matches the module specifications.

Use the provided protocols to send commands for switching relays. Test each channel individually to confirm proper operation before full deployment.

Regularly check connections and status indicators for stability. Keep firmware updated to benefit from improvements and security patches.

Frequently Asked Questions

Final Thoughts on Choosing the Best Ethernet Relay Module

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