10 Best Ethernet Relay Module in 2026

Ethernet relay modules provide a robust way to control electrical devices over a network without needing complex wiring setups. They are essential for automation tasks where remote access and stability matter most in critical environments like factories or smart homes.

We evaluated ten leading models focusing on their protocol support build quality and ease of integration with existing systems. Each unit was assessed for reliability features and compatibility to ensure you find the right fit for your specific project needs.

Each pick below highlights key strengths and ideal use cases to help you make an informed decision quickly. Please note that product availability and pricing can change so always verify current details before purchasing.

Top 3 Picks for Best Ethernet Relay Module

Top 10 Best Ethernet Relay Module in 2026 Compared

The table below offers a side by side look at the technical specifications and key capabilities of each model to simplify your selection process.

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

PoE Power Support

RS485 Interface

WiFi Bluetooth LE

This Industrial 8-Ch ESP32-S3 WiFi Relay Module stands out as a top-tier solution for users needing both robust networking and advanced processing capabilities. With a 4.8 rating it reflects strong user satisfaction regarding its reliability and feature set. It offers a unique combination of Ethernet PoE and wireless options that few competitors match in this price segment.

Pros

• High performance dual core processor
• Flexible power options include PoE
• Strong wireless connectivity features
• Multiple isolation circuits for safety
• Supports Arduino IDE easily

Cons

• Higher price than basic units
• Requires some technical setup knowledge

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The onboard ESP32-S3 microcontroller provides significant processing power allowing for complex automation logic directly on the device. You can manage digital inputs and relay outputs via RS485 Bluetooth or WiFi making it incredibly versatile for smart factory or home applications. The inclusion of multiple isolation circuits ensures that your low voltage control logic remains safe from high voltage interference.

While the price is higher than basic modules the added functionality justifies the cost for serious projects. You might find the initial configuration slightly more involved than plug-and-play units but the flexibility gained is substantial. This unit is ideal for engineers or hobbyists who need to integrate advanced protocols into their control systems.

If you require a module that supports both wired and wireless communication without compromising on safety features this is the top choice. It handles up to 10A per channel and supports direct control of home appliances. We recommend this for anyone building scalable industrial IoT systems.

Advanced Processing Power

The 32-bit LX7 dual-core processor allows for faster data handling and more complex logic execution compared to standard microcontrollers.

Versatile Connectivity

Support for RS485 WiFi and Ethernet means you can integrate this module into almost any existing network infrastructure seamlessly.

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2. 8-CH Ethernet Relay Module (B) – Best Value Ethernet Relay Module

4.9Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module (B) with Digital Input

Modbus RTU TCP

8-Ch Digital Input

PoE Power Supply

HTTP MQTT Support

The 8-CH Ethernet Relay Module (B) is a strong contender for the top spot due to its exceptional rating and comprehensive feature set. It balances industrial robustness with ease of use making it suitable for a wide range of control applications. Users praise its stability and the flexibility of its communication protocols.

Pros

• Excellent 4.9 user rating
• Versatile configuration options
• Includes digital inputs out of box
• Wide power input range
• Supports HTTP and MQTT

Cons

• Web configuration requires network access
• No wireless connectivity included

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This module supports both Modbus RTU and TCP allowing it to integrate seamlessly with standard industrial SCADA systems. The inclusion of eight digital inputs means you can monitor sensors or switches without needing extra hardware. Configuration is straightforward via a web browser or software tool which simplifies deployment for system integrators.

The main limitation is the lack of built-in wireless connectivity which may require a separate WiFi bridge if wiring is difficult. However the Ethernet and PoE options provide reliable power and data transmission in most fixed installations. This makes it a practical choice for permanent control panels or machine monitoring setups.

For projects requiring reliable wired connectivity and digital monitoring this module offers the best balance of features and cost. It supports dynamic IP assignment via DHCP which eases network setup significantly. We recommend it for users needing a robust industrial relay controller.

Industrial Protocol Support

Full Modbus RTU and TCP support ensures compatibility with legacy industrial equipment and modern software systems.

Integrated Monitoring

Eight digital inputs allow you to monitor external states like door switches or sensor triggers alongside relay control.

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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 Way Relay

TCP UDP Control

Web Server Access

5V 24V Input

The Pinhaijing LAN Ethernet 2 Way Relay Board is an excellent entry point for those needing basic network control without breaking the bank. With a 4.8 rating it delivers reliable performance for simple on-off tasks. Its compact design makes it easy to fit into tight enclosures or small projects.

Pros

• Very affordable price point
• Simple web interface control
• Compact PCB design
• Dual voltage input support
• Local password protection

Cons

• Limited to only two channels
• Fewer advanced features

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It functions as a simple web server allowing you to control relays via any browser on your local network. The STC microcontroller ensures stable operation and the board supports both TCP and UDP protocols for flexible integration. Password protection adds a layer of security to prevent unauthorized access to your controls.

While it lacks the advanced digital inputs of higher end units it serves its purpose well for simple automation. The limited channel count means it is not suitable for large scale systems but perfect for lighting or small appliance control. Users appreciate the military grade PCB material which adds durability.

If you need a cheap reliable way to turn devices on and off over the internet this board is the top pick. It supports a wide voltage range which simplifies power supply choices. We recommend it for hobbyists or small scale automation needs.

Easy Web Control

The built-in web server allows you to manage relay states using any standard browser without installing extra software.

Cost Effective Design

Despite the low price the board includes essential protection features and a robust PCB construction for reliability.

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4. 8-CH Ethernet Relay Module – Standard Industrial Ethernet Relay Module

3.4Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

Modbus RTU TCP

PoE Power Supply

ABS Rail Case

Flash On Off

This 8-CH Ethernet Relay Module is a standard industrial unit designed for straightforward relay control via Modbus protocols. It offers a functional solution for environments where basic connectivity and stability are the primary concerns. The design prioritizes reliability for fixed installations over advanced features.

Pros

• Standard Modbus protocol support
• PoE power capability
• ABS rail-mount casing
• Flash-on flash-off feature

Cons

• Lower user rating score
• Basic feature set

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The module supports PoE which simplifies wiring by combining power and data in a single cable. It includes a flash-on flash-off function that allows for automatic timed operations without external logic. The ABS rail-mount case ensures it fits securely into standard industrial distribution panels.

Despite its functional design it holds a lower user rating which suggests potential issues with documentation or connectivity stability for some users. It is best suited for simple tasks where advanced monitoring is not required. Users should ensure their network environment is stable before deployment.

For basic industrial control tasks where cost and simplicity are key this module is a viable option. It provides the essential Ethernet and Modbus capabilities needed for machine automation. We recommend checking community reviews before bulk purchasing to ensure it fits your specific needs.

Industrial Housing

The ABS rail-mount case is designed to withstand industrial environments and fits standard DIN rails securely.

Basic Timing

Flash on off features allow for simple pulse timing without needing an external timer or PLC.

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

4.1Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module

Modbus Protocol

MQTT Support

Optocoupler Isolation

Network Indicators

The Waveshare 8-Ch Ethernet Relay Module is a solid choice for users prioritizing safety and communication reliability. It features robust isolation circuits that protect the internal electronics from high voltage interference effectively. This makes it a dependable choice for environments with electrical noise.

Pros

• Strong isolation protection
• MQTT cloud control demo
• Clear status indicators
• PoE port communication

Cons

• Price higher than generic units
• Requires configuration for MQTT

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It supports MQTT protocol which allows for easy integration with cloud platforms like Alibaba Cloud. This feature is valuable for remote monitoring applications where data needs to be sent to a central server. The unit includes clear LED indicators that help diagnose network and status issues quickly.

While the price is slightly higher than generic options the build quality and support resources provided by Waveshare justify the cost. Users should be prepared to configure the MQTT settings via the provided demo which adds a step to the setup process. However once configured it offers stable remote control.

For projects requiring cloud connectivity and high safety standards this module is a strong candidate. The rail mount case ensures easy installation in control cabinets. We recommend it for users building IoT connected industrial systems.

Cloud Ready

Built-in MQTT support simplifies sending status data to cloud dashboards for remote monitoring capabilities.

Safety Isolation

Onboard optocoupler isolation prevents high voltage spikes from damaging the control logic or network ports.

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

4.6Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 Controller

RS485 and Ethernet

Optocoupler Isolation

Arduino IDE Support

This Industrial 8-Ch ESP32-S3 WiFi Relay Module combines powerful processing with extensive connectivity options for demanding applications. It is built around the ESP32-S3 which provides a strong foundation for running custom logic and scripts. Users benefit from a high satisfaction rating reflecting its stability.

Pros

• Dual mode wireless support
• Rich development resources
• Strong isolation circuits
• Wide power input range

Cons

• Complex setup for beginners
• Higher cost than standard units

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It supports both RS485 and Ethernet making it flexible for hybrid network setups. You can control it via Bluetooth or WiFi which removes the need for physical cabling in some areas. The unit includes comprehensive SDK resources and tutorials which simplify the development process for custom projects.

While it is not cheap the flexibility it offers for custom coding is significant. It is ideal for developers who need to implement proprietary protocols or complex automation logic. The presence of multiple isolation circuits ensures that even with advanced features safety is maintained.

If you are building a custom system that needs both wired and wireless options this module is highly capable. It supports up to 10A relay switching which covers most industrial needs. We recommend it for advanced users looking for flexibility.

Developer Friendly

Access to comprehensive SDKs and tutorials makes it easier to customize the module for specific project needs.

Hybrid Connectivity

Ethernet RS485 and wireless options provide multiple pathways to control the relay based on site conditions.

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

4.2Editor scoreCheck price on Amazon

Waveshare 30-Ch Ethernet Relay Module

30 Relay Channels

Modbus RTU TCP

Flyback Diode Protection

PoE Power Supply

The Waveshare 30-Ch Ethernet Relay Module is designed for applications that require control over a large number of devices. It stands out for its channel count which reduces the need for multiple units in complex systems. Users value its industrial grade design which ensures reliability in harsh conditions.

Pros

• High channel count
• Industrial grade build
• Dedicated driver chip
• PoE support included

Cons

• Higher price point
• Requires larger enclosure space

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It uses a dedicated relay driver chip that offers stronger driving ability and stability. This is crucial when switching multiple loads simultaneously without risk of failure. The unit also includes flyback diode protection which helps preserve the longevity of the relay contacts.

While it is more expensive than 8 channel units the cost per channel is often competitive for large systems. You will need a larger space to mount the unit which is something to consider during system planning. The PoE support helps manage power delivery for many channels efficiently.

If you are managing a large farm or factory setup this module provides a centralized control solution. It supports Modbus TCP which is essential for modern automation integration. We recommend it for large scale industrial monitoring and control.

High Density Control

With thirty independent channels you can control many devices from a single network interface saving space and cost.

Robust Driving

Dedicated driver chips ensure that the relays switch reliably even under high load conditions.

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

4.7Editor scoreCheck price on Amazon

Waveshare Industrial 8-Channel ESP32-S3

240MHz Processor

RTC Chip Included

Isolated RS485

USB Type-C Debug

This Industrial 8-Channel ESP32-S3 WiFi Relay Module is a premium device tailored for high performance industrial applications. It features a high clock speed processor that ensures quick response times for control tasks. Users appreciate the detailed monitoring indicators that help in debugging.

Pros

• High clock speed processor
• Scheduled tasks via RTC
• Excellent WiFi performance
• Debug and power access

Cons

• Premium price tag
• Requires configuration knowledge

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The onboard RTC chip allows you to schedule tasks locally without needing a constant network connection. This is very useful for timed operations like lighting or ventilation systems. The isolated RS485 interface ensures safe communication with external industrial modules.

While it comes at a premium price the feature set is unmatched for scheduling and processing. You can use USB Type-C for easy debugging and power which simplifies testing. The WiFi performance is also rated highly for consistent wireless connectivity in noisy environments.

For systems that require precise timing and local processing this module is a top choice. It supports both wireless and wired modes for maximum flexibility. We recommend it for advanced industrial control systems needing autonomy.

Local Scheduling

The built-in RTC chip allows you to set time based automation tasks even if the network is temporarily down.

Debugging Access

USB Type-C port provides easy access for firmware updates and power without extra adapters.

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

4.2Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module (B)

Flyback Diode Protection

Linkage Control Logic

Passive Active Input

Debounce Algorithm

This Waveshare 8-Ch Ethernet Relay Module (B) focuses on providing a safe and reliable control interface for industrial systems. It includes dedicated protection circuits that shield the internal components from electrical faults. Users value the linkage control feature which allows relay logic based on digital inputs.

Pros

• Strong protection circuits
• Linkage control features
• Reliable digital input
• Clear network indicators

Cons

• Higher price than generic
• Setup may take time

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The debounce algorithm ensures that digital inputs are read accurately without false triggers from electrical noise. This makes it ideal for environments with heavy machinery where spikes are common. The unit supports both passive and active digital inputs which increases compatibility with various sensors.

While the price is higher than generic options the safety features and logic capabilities are significant. It includes flyback diode protection to prevent damage from inductive loads like motors. This makes it a durable choice for long-term installations.

If you are building a system that interacts with noisy machinery this module is highly recommended. The digital input logic allows for simple automation without extra hardware. We recommend it for users prioritizing safety and reliability.

Logic Based Control

Linkage control allows you to trigger relays directly based on input states without needing an external computer.

Input Stability

Built-in debouncing ensures clean signals from switches and sensors preventing accidental relay triggers.

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

4.0Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

HTTP MQTT Support

DNS Protocol Support

Flash On Off Function

Optocoupler Isolation

This 8-CH Ethernet Relay Module is a standard option for those needing basic protocol support and safety. It offers HTTP and MQTT which provides a range of integration possibilities for home or small business use. The unit includes isolation to protect your network from high voltage.

Pros

• Flexible configuration methods
• PoE and DC power options
• Isolation included
• Standard Modbus support

Cons

• Basic feature set
• Average user rating

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It supports dynamic IP assignment which makes it easier to deploy in environments with DHCP servers. The flash on off function allows for simple timing tasks without extra components. Users find it functional for standard control tasks where advanced features are not necessary.

While it is not the most feature-rich unit on the market it is reliable for basic tasks. The rail mount case ensures it fits well into industrial cabinets. It is a good value for those needing a straightforward Ethernet controller.

For standard automation tasks where simplicity is key this module serves well. It balances power options and safety features adequately. We recommend it for entry-level industrial projects.

Standard Protocols

Support for HTTP and MQTT allows integration with both web tools and cloud platforms easily.

Network Ease

DHCP support means the device gets an IP address automatically which simplifies initial setup steps.

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Buying Guide – How to Choose the Best Ethernet Relay Module

Selecting the right Ethernet relay module requires careful evaluation of several factors to ensure it fits your technical needs.

Protocol Support and Compatibility

Different systems use different communication protocols. Ensure the module supports Modbus TCP or HTTP depending on your software requirements. This ensures smooth integration without complex workarounds.

Always verify the software stack supports the protocol before purchase to avoid compatibility issues.

Relay Capacity and Ratings

Check the contact rating to ensure it can handle your load. Most units support up to 10A at 250VAC which is sufficient for household appliances. Exceeding this can lead to safety hazards.

Choose a unit with a rating slightly higher than your max load for safety margin.

Power Input Options

Modules with PoE support reduce wiring complexity by allowing power over a single Ethernet cable. This is ideal for locations far from power sources. Some also support wide DC ranges for flexibility.

Decide if you need PoE or local power to simplify your cabling plan.

Isolation and Safety

Optocoupler isolation is critical for protecting your network from high voltage surges. Look for units with this feature to ensure safety in industrial settings. It prevents damage to your router or PC.

Never skip isolation if you plan to switch high voltage loads.

Digital Input Capability

If you need to monitor switches or sensors the unit should include digital inputs. This allows for linkage control where a switch triggers a relay automatically. It reduces the need for external controllers.

Select modules with inputs if your project requires sensing external states.

Ease of Configuration

User friendly interfaces like web browsers or dedicated software make setup faster. Units with clear documentation save time and frustration. Check if the vendor provides demos or support.

Prioritize units with clear guides to speed up deployment.

Enclosure and Mounting

Industrial settings require robust enclosures that withstand dust or shock. Look for ABS rail mount cases for easy installation in cabinets. It ensures the unit stays secure during operation.

Ensure the case type matches your installation environment for safety.

Expansion Potential

Consider future needs before buying. If you might need more channels choose a model with higher density. Adding multiple units later can be more complex than using one larger module.

Plan for future growth to avoid replacing units too soon.

How to Use and Care for Your Ethernet Relay Module

Before powering on check that all wiring connections are secure and match the voltage ratings. Ensure your power supply matches the DC requirements to avoid damage to the module electronics.

Use the web interface or software tool to assign an IP address and verify connectivity. You can then send commands via HTTP or Modbus to toggle relays. Check status LEDs to confirm operation.

Keep the module in a clean dry area to prevent dust buildup on the ports. Do not expose it to temperatures outside the specified range. Periodically check connections to ensure long-term stability.

Frequently Asked Questions

Final Thoughts on Choosing the Best Ethernet Relay Module

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