10 Best Ethernet Relay Module in 2026

Ethernet relay modules are essential components for modern industrial automation and smart home systems. They allow you to control high voltage devices remotely via a network connection ensuring safety and convenience in various applications.

We evaluated ten top rated models based on protocol support, channel count, and build quality. Our analysis covers Modbus compatibility, PoE options, and isolation features to help you find the right hardware for your project.

Each pick highlights specific strengths like wireless integration or rugged enclosures. Please note that product availability and pricing can fluctuate so always verify current details before making your final purchasing decision for your setup.

Top 3 Picks for Best Ethernet Relay Module

Top 10 Best Ethernet Relay Module in 2026 Compared

This side by side comparison lists all ten reviewed products with their key specifications. Use this table to quickly identify the best model for your specific channel count and connectivity requirements.

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

240MHz Dual Core

PoE Power Supply

Bi-Directional Isolation

10A 250V AC Rating

This industrial 8-channel module stands out with its ESP32-S3 microcontroller offering both WiFi and Bluetooth LE connectivity. With a 4.8 rating it delivers robust performance for demanding automation tasks requiring remote access and flexibility.

Pros

• Dual wireless connectivity options
• Integrated PoE power supply
• High rating digital inputs
• Industrial grade protection circuits

Cons

• Higher cost than basic modules
• Requires configuration for Ethernet

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The onboard PoE module allows for single cable installation reducing wiring complexity significantly. Additionally the optocoupler isolation protects sensitive electronics from high voltage spikes ensuring long term reliability in harsh environments.

While the price is higher than simple Ethernet boards the dual wireless protocols justify the investment for complex systems. The trade-off is the initial setup time needed to configure network settings for optimal performance.

Buyers seeking a versatile solution for smart factories or advanced home automation should choose this model. It provides the best balance of wired stability and wireless convenience available in this category today.

Versatile Wireless Communication

Integrated 2.4GHz WiFi and Bluetooth LE allow for seamless remote control via smartphones or dedicated IoT gateways.

Safe High Voltage Control

Optocoupler and power isolation circuits prevent dangerous feedback from damaging your controller or network infrastructure.

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2. 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

5V or 9-24V Input

Military Grade PCB

TCP UDP Controller

The Pinhaijing board offers an incredibly low entry cost for users needing basic Ethernet relay control. Despite its price it maintains a high 4.8 rating due to reliable performance and simple TCP/UDP communication capabilities.

Pros

• Very affordable price point
• Simple web interface control
• Wide voltage input range
• Secure password protection

Cons

• Only two relay channels
• Lacks industrial rail mounting

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Its military grade PCB ensures durability while the built-in web server allows for easy configuration without complex software. The wide voltage input range makes it adaptable to various power sources found in hobby projects.

The main limitation is the two channel count which restricts scalability for larger projects. However for small scale tasks like light control or simple alarms this limitation is often acceptable and manageable.

This module is perfect for hobbyists or small businesses testing automation ideas on a tight budget. Its security features and web interface make it a safe and easy choice for initial deployments.

Secure Remote Access

Local password protection ensures that only authorized users can control the relays via the internet connection.

Flexible Power Options

Supports both 5V and 9-24V inputs making it compatible with standard USB adapters or industrial power supplies.

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3. Waveshare 30-Ch Ethernet Relay Module – Best Premium Ethernet Relay Module

4.2Editor scoreCheck price on Amazon

Waveshare 30-Ch Ethernet Relay Module

30 Relay Channels

Modbus RTU TCP

Dedicated Driver Chip

Rail-Mount ABS Case

This 30-channel module is designed for large scale industrial applications requiring extensive control points. With a 4.2 rating it delivers stability and speed suitable for critical infrastructure and large facility management systems.

Pros

• Highest channel count available
• Modbus protocol support
• Industrial rail-mount case
• PoE power option

Cons

• Large physical footprint
• Complex configuration for many ports

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The dedicated relay driver chip provides stronger driving ability ensuring consistent switching across all channels. The rail-mount case allows for easy integration into standard electrical cabinets found in commercial environments.

While it handles many channels efficiently the configuration process can be complex for small projects. The large physical size also requires more cabinet space compared to standard 8-channel units.

Facility managers and system integrators needing massive I/O should choose this premium solution. It consolidates control requirements into a single device reducing wiring complexity and simplifying network management significantly.

Industrial Integration

The ABS rail-mount case ensures secure installation in standard electrical panels for professional deployment.

Reliable Protocol Support

Modbus RTU and TCP protocols enable seamless communication with SCADA systems and industrial PLC controllers.

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4. 8-CH Ethernet Relay Module (B) – Best Digital Input Integration Ethernet Relay Module

4.9Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module (B)

Modbus TCP RTU

Passive and Active DI

Web Browser Config

IEEE 802.3af PoE

This model boasts an impressive 4.9 rating due to its robust input and output capabilities. It combines relay control with digital input monitoring making it ideal for systems that need feedback alongside control.

Pros

• Highest rating in category
• Bi-directional input isolation
• Easy browser configuration
• Multiple communication modes

Cons

• Limited to 8 channels
• Requires web access for config

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The bi-directional optocoupler isolation ensures that active and passive inputs are read safely without electrical interference. Web browser configuration simplifies the setup process compared to complex software tools or physical jumpers.

The main trade-off is the limitation to 8 channels which might not suit very large expansion needs. However for standard industrial control tasks this count is usually sufficient and cost effective.

Users requiring feedback loops like sensor monitoring or switch status should pick this unit. It offers the highest reliability and ease of setup in its price range for standard automation needs.

Simplified Configuration

Web browser configuration allows network adjustments without needing specialized client software installed on your computer.

Flexible Input Support

Supports both dry and wet contact inputs for compatibility with a wide variety of industrial sensors and switches.

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5. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Best ESP32 Variant Ethernet Relay Module

4.6Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

240MHz Dual Core

Arduino IDE Support

RS485 Interface

Optocoupler Isolation

This module is an open and developer-friendly alternative featuring the powerful ESP32-S3 microcontroller. With a 4.6 rating it provides extensive SDK and online resources for users who want to customize their automation logic deeply.

Pros

• Open development resources
• Strong processor performance
• Multiple connectivity options
• Reliable relay rating

Cons

• Complex for simple use cases
• No PoE on this version

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The onboard RS485 interface supports industrial Modbus standards while WiFi and Bluetooth enable flexible remote access. The relay rating of 10A at 250V AC allows direct control of common household appliances safely.

The complexity of the ESP32 ecosystem might be overwhelming for non technical users seeking plug and play solutions. Additionally the lack of PoE on this specific variant may require extra power wiring.

Developers and custom integrators who need flexible programming will love this board. It provides a balance of raw power and connectivity options for sophisticated DIY and professional projects.

Extensive Developer Resources

Comprehensive SDK, online tutorials, and technical support make it easy to start complex custom automation projects.

Multi-Protocol Connectivity

Combining Ethernet, WiFi, and RS485 ensures you can connect the device to almost any existing network system.

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6. 8-CH Ethernet Relay Module (A) – Solid Industrial Standard Ethernet Relay Module

3.4Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module (A)

Modbus RTU TCP

PoE Power Supply

Flash-On/Off Function

Rail-Mount ABS Case

This model offers a straightforward approach to Ethernet relay control with essential industrial features. Despite a lower rating it remains a viable option for users needing basic functionality without advanced wireless connectivity requirements.

Pros

• Flash timing functions
• Standard rail mount case
• PoE power capability
• MQTT protocol support

Cons

• Lower user rating
• Basic feature set

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The flash-on and flash-off functions provide useful automation capabilities for signaling or testing without external logic. PoE power support simplifies wiring by combining data and power in a single cable for the unit.

The lower rating suggests potential issues with reliability or customer support compared to top tier brands. Users should verify warranty terms before relying on it for critical infrastructure or permanent installations.

It suits users needing a no-frills industrial controller for simple tasks. If basic network control is all you need this module provides the essential tools at a competitive value point.

Built-in Automation

Flash functions allow relays to toggle automatically for specific durations useful for status signaling or safety checks.

Cloud Integration

MQTT protocol support enables easy connection to cloud platforms for remote monitoring and management capabilities.

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7. Waveshare 8-Ch Ethernet Relay Module – Reliable Brand Ethernet Relay Module

4.1Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module

Industrial Rail-Mount Case

PoE Port Communication

4 LEDs Network Indicators

Reverse-Proof Circuit

Waveshare is known for reliable electronics which reflects in this module's steady performance. A 4.1 rating indicates consistent quality that fits well into professional and hobbyist industrial control setups effectively.

Pros

• Strong brand reputation
• Visual status indicators
• Reverse-proof protection
• Industrial rail mounting

Cons

• Slightly higher price point
• Fewer advanced features

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The four network LEDs provide clear visual feedback on data transmission status aiding troubleshooting and monitoring. Reverse-proof circuit design prevents accidental damage during wiring which is crucial for field installations.

While it lacks some advanced features found in ESP32 models it excels in pure Ethernet reliability. The price reflects the brand reliability but may be higher than generic alternatives available on the market.

Installers preferring established hardware brands should select this module. It offers dependable performance and physical protections suitable for standard industrial automation applications requiring steady connectivity.

Visual Diagnostics

LED indicators show MCU status and signal receiving to help quickly identify network connection issues during setup.

Protection Features

Reverse-proof circuits safeguard the internal components from damage caused by incorrect power or signal connections.

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8. Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module – Best Industrial WiFi Option Ethernet Relay Module

4.7Editor scoreCheck price on Amazon

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module

RTC Chip Built-In

USB Type-C Port

PoE Ethernet Port

Isolated RS485

This Waveshare variant combines industrial strength with high performance wireless processing. Its 4.7 rating highlights excellent build quality and the inclusion of a real-time clock for scheduled automation tasks without external servers.

Pros

• High performance processor
• Scheduled task support
• Rich wiki resources
• PoE option available

Cons

• Premium price for WiFi unit
• Advanced features may be unused

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The isolated RS485 interface ensures reliable data transfer in electrically noisy environments. The USB Type-C port simplifies firmware updates and debugging making maintenance much easier than older micro-USB designs.

The premium price is justified by the advanced features like RTC and high speed processing. However for simple on-off control these features may add unnecessary cost for basic users.

Users needing scheduled automation or complex data logging will appreciate this model. It brings robust industrial connectivity and scheduling capabilities into a compact WiFi enabled package.

Internal Scheduling

An onboard RTC chip allows for time-based relay control without needing external cloud servers or internet connectivity.

Easy Maintenance

USB Type-C ports streamline firmware updates ensuring your device stays secure and up to date easily.

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9. Waveshare 8-Ch Ethernet Relay Module (B) – Smart Logic Control Ethernet Relay Module

4.2Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module (B)

Debounce Algorithm Included

Linkage Control Logic

Flyback Diode Protection

Rail-Mount ABS Case

This module stands out for its built-in smart logic features like debounce and linkage control. With a 4.2 rating it simplifies automation logic by handling timing and trigger conditions directly on the hardware.

Pros

• Built-in debounce logic
• Linkage control features
• Flyback diode protection
• Industrial mounting case

Cons

• Complex logic for simple use
• Higher cost than basic

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The built-in debounce algorithm filters out signal noise ensuring stable readings from mechanical switches or sensors. Dedicated driver chips with flyback diodes protect the circuit during high inductive load switching cycles.

The advanced logic features might complicate setup for users who only need simple on/off switching. This extra intelligence increases the cost compared to basic relay boards available in the same market.

Users needing automatic interlocking or noise filtering will benefit from this module. It reduces the load on your central controller by handling logic at the edge device effectively.

Signal Stability

The internal debounce algorithm prevents false triggers caused by mechanical switch bounce or electrical noise interference.

Relay Linkage

Linkage control allows one input to automatically trigger multiple relays without external programming or complex scripts.

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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

HTTP / MQTT Mode

DNS Protocol Support

7-36V DC Input

Flash-On/Off Function

This module offers a broad range of communication protocols including HTTP and MQTT for flexible integration. With a 4.0 rating it serves as a functional standard option for basic industrial control environments.

Pros

• Broad protocol support
• DNS and DHCP config
• Rail-mount case
• Optocoupler isolation

Cons

• Average feature set
• Moderate user rating

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Support for DNS and DHCP makes network setup straightforward for dynamic environments where static IPs are not feasible. The flash-on and flash-off functions provide simple built-in timing capabilities without extra coding.

While it covers essential needs it may lack the premium build quality of higher rated competitors. Users should ensure compatibility with their specific network security requirements before finalizing the purchase.

This unit is suitable for standard projects requiring basic protocol flexibility. If you need simple reliable control with standard internet protocols this module provides an effective solution.

Network Flexibility

Support for DHCP and DNS simplifies connection to dynamic networks without manual IP configuration steps.

Safe Isolation

Optocoupler isolation ensures high voltage circuits do not interfere with sensitive logic and network electronics.

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Buying Guide – How to Choose the Best Ethernet Relay Module

Selecting the right module depends on your specific control needs and network environment. We break down the key factors to consider before making a purchase for your project.

Channel Count

Determine how many devices you need to control simultaneously. While some modules offer 2 or 8 channels others provide up to 30 for large scale industrial control needs.

Choose a count that matches your current load and leaves room for future expansion if necessary.

Communication Protocol

Check if your system requires Modbus TCP/RTU or MQTT for cloud integration. Some modules support multiple protocols like HTTP and UDP for broader compatibility with legacy systems.

Ensure the selected module speaks the same language as your central controller or home automation software.

Power Supply Options

PoE (Power over Ethernet) is a valuable feature that reduces wiring by combining data and power in one cable. Standard DC inputs like 7-36V are common for flexible industrial installations.

Select a power method that fits your infrastructure to avoid running extra cables to the control panel.

Isolation and Protection

Look for optocoupler isolation to protect your network from high voltage spikes. Reverse-proof circuits and flyback diodes are crucial for preventing damage during incorrect wiring or inductive load switching.

Prioritize units with strong isolation features to ensure long term reliability and safety.

Wireless Connectivity

Some modern modules include WiFi and Bluetooth for wireless control options. This is useful for retrofits where cabling Ethernet cables is difficult or costly.

Verify the range and stability of the wireless connection before relying on it for critical automation tasks.

Input Types

If you need sensors to trigger actions look for modules with digital inputs. These should support both passive dry contact and active wet contact inputs for sensor flexibility.

Bi-directional isolation on inputs ensures that sensor signals are read safely without interference from the relay circuits.

Physical Installation

Industrial grade rail-mount cases allow for secure installation in standard electrical cabinets. Ensure the physical dimensions fit your available space and mounting requirements.

Choose a casing that protects the electronics from dust and mechanical stress in your environment.

Configurability

Web browser configuration simplifies setup without needing complex software. Check if the module supports dynamic IP assignment via DHCP to adapt to network changes easily.

Simple configuration tools save time and reduce errors during initial installation and maintenance phases.

How to Use and Care for Your Ethernet Relay Module

Connect the Ethernet cable to your network switch and configure the IP address via the provided web interface or software. Use a compatible terminal program to test Modbus commands if supported.

Install the relay module in a dry location with adequate ventilation. Ensure all high voltage wiring is secure and insulated to prevent accidental contact or short circuits.

Regularly update the firmware to patch security vulnerabilities and improve performance. Monitor the LED indicators to verify stable network connectivity and relay status during operation.

Frequently Asked Questions

Final Thoughts on Choosing the Best Ethernet Relay Module

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