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Green circuit board with relay and USB-C port inside grey DIN-rail plastic enclosure

WaveShare

WaveShare ESP32-S3 WiFi Relay Module 1-Ch 10A 250VAC Rail Mount

SKU CH-12ZT-WX926

Controls 10 A 250 VAC loads via Wi-Fi, Bluetooth 5 or RS485 with multiple isolation protections

  • ESP32-S3 dual-core processor runs at 240 MHz for responsive automation
  • 4 GHz WiFi and Bluetooth 5 enable wireless and app-based control
  • 10 A 250 VAC relay switches 220 VAC appliances directly
  • Isolated RS485 interface connects Modbus sensors and industrial modules
  • Multiple isolation layers with TVS protection safeguard the module in harsh environments

Industrial ESP32-S3 Relay Module

This module combines an ESP32-S3 microcontroller with a single-channel relay for industrial automation tasks. The dual-core processor runs at 240 MHz and provides integrated 2.4 GHz WiFi and Bluetooth 5 connectivity. It is designed for engineers and system integrators who need wireless or wired remote control of electrical loads up to 10A at 250VAC or 30VDC. The rail-mount enclosure suits cabinet installations in commercial or residential environments.

Rail Mount Case and Isolated Interfaces

The protective rail-mount case simplifies installation on standard DIN rails inside control panels. A USB Type-C port handles power, firmware flashing and debugging, while a screw terminal accepts 5 V supply input. The isolated RS485 interface connects to Modbus sensors or modules with optocoupler, digital and power-supply isolation plus TVS protection. Onboard TX/RX indicators show communication status at a glance.

Single Channel and 5 V Power Constraint

Only one relay channel is available, so applications requiring multiple independent circuits need additional modules. The relay contacts are rated for 10A at 250VAC or 30VDC, limiting use to loads within those boundaries. The board must be powered from a 5 V source via the screw terminal or USB Type-C connector; no other supply voltages are supported. Scheduled tasks rely on the onboard RTC chip.

Highlights

  • ESP32-S3 dual-core processor runs at 240 MHz for responsive automation
  • 4 GHz WiFi and Bluetooth 5 enable wireless and app-based control
  • 10 A 250 VAC relay switches 220 VAC appliances directly
  • Isolated RS485 interface connects Modbus sensors and industrial modules
  • Multiple isolation layers with TVS protection safeguard the module in harsh environments

Specifications

No published specifications for this item yet.

Questions about this item

What Wi-Fi standard does the ESP32-S3 module use and what frequency does it operate on?

The module uses 802.11 b/g/n Wi-Fi on the 2.4 GHz band for wireless communication.

What rail type does the protective case mount on and what power input does the screw terminal accept?

The case is designed for standard DIN rail mounting and the screw terminal accepts a 5 V power supply only.

How is firmware loaded onto the module and which port is used for debugging?

Firmware is downloaded and debugged through the onboard USB Type-C port using Arduino IDE or similar tools.

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