4 Channel Relay Controller Board - module with 4 relays

Module with MOSFET transistor, 5-36 V, 20 A, switching frequency 1 kHz. DFRobot DFR0457

Module with 32 24 V relays with a load of up to 7 A. The board communicates via the Ethernet interface. Numato Lab 32ETHRL001-24

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.

AO3406 MOSFET transistor module with N channel and JST PH2.0 connector designed to control motor, solenoid or LEDs. Adafruit 5648

This XIAO ESP32-C6-based relay module is designed for intelligent automation. It allows independent control of six channels via Wi-Fi, Zigbee, Thread, or BLE, and thanks to the built-in ESPHome, it easily integrates with Home Assistant. It supports DC devices up to 30V, features two Grove ports for expansion, and comes in an aesthetically pleasing PLA enclosure. Ideal for IoT systems, home automation, lighting, and motor control. Seeed Studio 114993588

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

Module with 2 relays SRD-05VDC-SL-C with a load up to 10 A. The board is equipped with a Grove connector and is controlled by a digital signal. Seeed Studio 103020132

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

The module with two 12 V relays and optoisolation enables safe control of AC and DC loads from a microcontroller. Support for high-level or low-level triggering and LED indication make it a universal component in automation systems, control applications, and DIY projects. modRL02_ISO-12V

Module with electromechanical relay. It allows you to control devices with an operating voltage of up to 250 V AC and a current of up to 3 A or a voltage of 30 V DC and a current of 3 A

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

Module with 4 SSR relays with a load of up to 3 A. The board communicates via the USB interface. Numato Lab SSR40001-DC

4-channel switch module with a maximum voltage of 16 V and a current of 2 A based on a MOSFET transistor. It is controlled by digital inputs. It is equipped with a screw connection and status LEDs. Adafruit 5757

Module with four 240V/2A relays controlled by 5V with a fuse triggered by a high state. modSSR-4CH-H

Industrial Ethernet module that allows control of 30 relays via RJ45 port. It uses Modbus TCP protocol, PoE (Power over Ethernet) power supply and comes with a rail-mounted housing. Waveshare Modbus POE ETH Relay 30CH

Adafruit FeatherWing module with snap relay. It allows you to control high-power components using a microcontroller. It allows switching current to 2A (at 40VAC or 30VDC) and voltage up to 250VAC. Adafruit 2923