12V relay module with timer

Module with 2 SSR relays with a load of up to 3 A. The board is equipped with the ULN2003 system and communicates via a digital interface. Numato Lab SSRC20001-AC

The module with 4 relays, designed to work with the micro:bit. It allows you to control devices with operating parameters up to 120VAC/2A or 24VDC/2A. SB Components 14118

I/O module supporting Modbus RTU via USB and RS485 and Modbus TCP via Ethernet. It has 4 built-in SPST relays and 8 digital inputs, 8 digital outputs and 4 analog inputs. Provides a flexible DIN rail mounting system. Numato Lab NLRXE002-A

This module allows independent control of two Omron G5LE-14-DC12 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 5666

Industrial relay module controlled via RS485 interface with Modbus RTU protocol support, offering 8 outputs with maximum load of 10 A. Equipped with galvanic isolation, opto-isolation, TVS diodes and DIN mounting, it ensures safe and reliable operation in harsh industrial conditions. Thanks to functions such as flash-on/off, configurable RS485 address (1-255), signaling diodes and wide power supply range (7-36 V), the module is perfect for building automation and device control. Waveshare Modbus RTU Relay (B)

The module is ideal for applications requiring precise control and signal processing, with the ability to be easily controlled via Ethernet. Numato Lab NLETHGC016-HB

Module with 64 relays with a maximum switching current of 10 A. It communicates via the USB interface. Numato Lab RL640001

8-channel module with relays, designed to work with the Raspberry Pi. It can switch 250VAC/7A or 30VDC/10A signals. With LCD 4,3" display. SB Components 21871

Module with one 240V/2A relay controlled by 5V with a fuse triggered by a high state. modSSR-1CH-H

Gravity: Digital 10A Relay Module is a module with 10A 35VAC / 30VDC relay compatible with devices with control signals in the range of 2.8 ... 5.5V. DFRobot DFR0473

Module with 5 V relay with a maximum switching current of 2 A. It communicates via the USB interface and does not require an additional power supply. Numato Lab USBPOWRL002

Module with MOSFET and a Gravity connector. It allows you to easily connect and control the voltage from 5V to 30V and the current up to 2.5A. DFRobot DFR0643

Module with monostable relay. It allows you to control high-power elements with a microcontroller. Adafruit 3191

Extension module compatible with Raspberry Pi. The board is equipped with three 24 V 2 A relays, three buffer inputs, three sink outputs and three analog inputs with a working range up to 24 V. Pimoroni PIM213

The module contains a 5 V relay with a maximum current of 10 A (250 VAC) and optoisolated inputs, and with jumpers it is possible to select high or low switching. The module is equipped with screw connectors