16 Channel USB Relay Module - a module with 16 relays and a USB interface

8-channel PoE module with relays allowing you to connect your PC to other electronic circuits via the network. It does not need a separate cable for power and data transmission. It can be controlled via a simple web interface or Telnet. Numato Lab NLRP1001-A

2-channel SSR 240V / 2A relay module with fuse. modSSR-2CH

2-channel module with relays designed to work with the Raspberry Pi Pico. It can switch signals up to 120 V AC or 24 V DC and currents up to 2 A. SB Components 21376

Module with 4 5 V relays with a maximum switching current of 2 A. It communicates via the USB interface and does not require an additional power supply. Numato Lab USBPOWRL004

Module with a relay and WiFi communication. Compatible with ESP-01 or ESP-01S

Pololu 5425 offers silent, reliable operation when switching currents up to 10 A and voltages up to 30 V, providing galvanic isolation and full configurability of RC control parameters. The version without soldered connectors allows easy adaptation to individual mounting needs in RC and automation projects.

The 24 V relay module with adjustable delay time offers a practical solution for AC/DC load control in automation and electronics applications

Module with a 12 V relay and a timer. It allows you to turn the device on and off cyclically at a specified time using potentiometers. It can also operate in single trigger mode, which allows the device to be turned on after a signal has been applied for a specified period of time. The operating time can be adjusted from 1 s to 100 s or from 1 s to 15 min

Module with 4 relays with a maximum switching current of 7 A. It communicates via the USB interface. Numato Lab RL40001

Module with SSR 240V/2A relay controlled by 5V voltage with fuse. modSSR-1CH

Industrial module with 16 relays. It communicates via the RS485 interface and supports the Modbus RTU protocol. Waveshare Modbus RTU Relay 16CH

Module with 4 SSR relays with a load of up to 3 A. The board communicates via the Ethernet interface. Numato Lab 4ETHSSR001-AC

Module with a 12 V relay and a timer. It enables the implementation of delayed switching on or off of the circuit with the possibility of time adjustment

This module allows independent control of two Omron G5LE-14-DC5 SPDT relays, supporting currents up to 10A. Thanks to built-in BSS138K MOSFETs, it can be controlled directly from 3.3V or 5V development boards such as Arduino or Raspberry Pi. Each channel is equipped with an LED to indicate relay activation and 5mm screw terminals for convenient circuit connection. Pololu 5665

This industrial relay module, powered by the Raspberry Pi RP2350B microcontroller, features six 10A 250VAC/30VDC relays and an isolated RS485 interface. It ensures safe and stable operation thanks to opto-isolation, power isolation, and surge protection. It supports programming in C/C++, MicroPython, and the Arduino IDE, and the 40-pin Pico HAT connector allows for easy expansion. Its robust DIN housing and 7–36V DC power supply make it ideal for industrial automation and IoT projects. Waveshare RP2350-Relay-6CH

8 Channel 5V Relay Module