Relay modules

By means of a relay, a circuit with much more power can be switched with a relatively small current.

Relay modules RTC Modules Digital storage modules Signal generator modules

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Opencircuit 5V Relay module 2 channels A small and powerful relay module for safely switching larger voltages. This module works on 5V and can be completely isolated by means of a jumper.Properties2 channelsIsolated by means of an optocouplerBuilt-in LED indicatorOperates on 5VMaximum load: AC 250V / 10A, DC 30V / 10A
In stock
€ 2,15 Incl. VAT
Opencircuit IRF520 mosfet module This mosfet module works as a digital switch / relay. With the IRF520 as a mosfet, this module can switch up to 5A. This mosfet can be controlled by means of a digital signal and even pwm.
In stock
€ 1,80 Incl. VAT
Opencircuit 5V Relay module 8 channels This 8 channel relay module can be used to safely switch on and off 8 separate channels. This gives you control over other circuits or devices, without the risk of the arduino being damaged or dangerous situations arising.
In stock
€ 5,45 Incl. VAT
Opencircuit 12v module relay A small and powerful relay module for safely switching larger voltages. This module works on 12V and can be set high active or low active by means of a jumper.
In stock
€ 1,95 Incl. VAT
Opencircuit 5V Relay module 16 channels This 16 channel relay module can be used to safely switch on and off 16 separate channels. This gives you control over other circuits or devices, without the risk of the arduino being damaged or dangerous situations arising.
In stock
€ 8,70 Incl. VAT
Opencircuit 5V relay with adjustable delay (0S - 10S) 5V relay module with a NE555 (timer) IC. By adding this timer it is possible to set a delay from 0 to 10 seconds before this relay turns 'on'. The module is initially off and turns on after X seconds.
In stock
€ 4,15 Incl. VAT
Opencircuit Temperature controlled relay 12V - W1209 This temperature-controlled relay that, as the name suggests, contains a relay that is activated at a preset temperature. The supplied probe, which contains an accurate thermistor, measures the current temperature with an interval of 2Hz.
In stock
€ 4,00 Incl. VAT
Opencircuit Solid state relay module 240VAC 8 channel Solid state relay module with a maximum output voltage of 240V AC and a current of max 2A. This module contains 8 channels that can be controlled independently of each other with a voltage of 5V. The solid state relays (SSR) are smaller, quieter, stronger and safer than the standard relay modules ..
In stock
€ 14,50 Incl. VAT
Opencircuit 5V Relay 10A 5V Relay with a switching capacity of 10A. By means of a relay, a circuit with much more power (10A, 250VAC) can be switched with a relatively small current.
In stock
€ 1,40 Incl. VAT
Opencircuit Bistabiel relay module 12V A small and powerful bistable relay module to safely switch larger voltages. This module has a bistable effect, which means that with a pulse the relay is opened and closed again with the next pulse. This module works on 12V and can switch up to 10A.
In stock
€ 2,05 Incl. VAT
Opencircuit 12v 10A relay with 433MHz receiver A small and powerful 12V relay module with 433MHz receiver. The relay can switch up to 10A in 4 modes (toggle, momentary, latching, timer [5, 10 and 15s]) and is securely packaged with a 433MHz receiver in a plastic housing.Please note, no remote control is included.
In stock
€ 8,05 Incl. VAT
Opencircuit 12v 2 channel 10A relay with 433MHz receiver A small and powerful 2 channel 12V relay module with 433MHz receiver. Both relays can switch up to 10A in 3 modes (toggle, momentary and latching) and are securely packaged with a 433MHz receiver in a plastic housing.Please note, no remote control is included.
In stock
€ 9,85 Incl. VAT
Opencircuit 12V relay with adjustable delay (0S - 10S) Enhance your electronic projects with our 12V relay module featuring an NE555 timer IC. Easily set a delay of 0 to 10 seconds before the relay switches 'on', perfect for a wide range of applications.
In stock
€ 3,00 Incl. VAT
Opencircuit 24V Relay 10A 24V Relay with a switching capacity of 10A. By means of a relay, a circuit with much more power (10A, 250VAC) can be switched with a relatively small current.
In stock
€ 2,20 Incl. VAT
DFRobot Gravity: Digital 5A Relay Module DFRobot #DFR0017 The DFRobot Relay Module is a standard relay used with a controller board to interface external electrical circuits or modules. Some of the most common applications with Arduino are: Home lighting, electrical appliances of high power and other equipments.
In stock
€ 3,30 Incl. VAT
Whadda Bistable relay module with push button - 1 channel - 12V Whadda #WPM331 This WPM331 push button bistable relay module can turn an external circuit or device on or off via an external switch.
In stock
€ 9,40 Incl. VAT
LilyGO T-Relay-8 ESP32 - 5V 8 Channel Relay Module LilyGO #H561 The LilyGO T-Relay-8 ESP32 (H561), is a versatile 5V 8 Channel Relay Module designed for seamless automation and control. With 8 mechanical relays at your fingertips, coupled with the power of Wi-Fi and Bluetooth connectivity, this module empowers your projects. It features electronic switching for precise control and compatibility with I2C, SPI, and UART interfaces, offering flexibility in integration.
In stock
€ 22,50 Incl. VAT
Opencircuit Relay module 5V 5V Relay module with optocoupler for safe control of high voltage devices. Features compact size, easy-to-use interface, handles up to 10A, plug-and-play design, and indicator light for reliable operation.
Delivered in 14 to 30 days
€ 2,00 Incl. VAT
Opencircuit Solid state relais 3-32V / 40A / 24-380VAC Solid state relays are more economical than mechanical relays because they require a much lower current to be switched. Furthermore, an SSR contains no moving parts, so they switch faster and last much longer because there is less wear.
Delivered in 14 to 30 days
€ 3,20 Incl. VAT
Opencircuit 12V Mini Relay 3A 12V Relay with a switching capacity of 3A. By means of a relay, a circuit with much more power (3A, 250VAC) can be switched with a relatively small current.
Delivered in 14 to 30 days
€ 2,05 Incl. VAT
Pololu Basic 2-Channel SPDT Relay Carrier with 5VDC Relays (Assembled) Pololu #2485 Pololu Basic 2-Channel SPDT Relay Carrier with 5VDC Relays (Assembled).The Pololu basic 2-channel relay carrier modules allow simple, independent control of two single-pole, double-throw (SPDT) switches from low-voltage, low-current control signals.
Delivered in 5 to 14 days
€ 15,20 Incl. VAT
Pololu Basic 2-Channel SPDT Relay Carrier with 12VDC Relays (Assembled) Pololu #2487 The Pololu basic 2-channel relay carrier modules allow simple, independent control of two single-pole, double-throw (SPDT) switches from low-voltage, low-current control signals.
Delivered in 5 to 14 days
€ 15,80 Incl. VAT
Pololu Basic SPDT Relay Carrier with 12VDC Relay (Assembled) Pololu #2482 The Pololu basic relay carrier modules allow simple control of a single-pole, double-throw (SPDT) switch from low-voltage, low-current control signals.
Delivered in 5 to 14 days
€ 8,40 Incl. VAT
Pololu Basic SPDT Relay Carrier with 5VDC Relay (Assembled) Pololu #2480 Pololu Basic SPDT Relay Carrier with 5VDC Relay (Assembled).The Pololu basic relay carrier modules allow simple control of a single-pole, double-throw (SPDT) switch from low-voltage, low-current control signals.
Delivered in 5 to 14 days
€ 8,40 Incl. VAT
Pololu RC Switch with Relay (Assembled) Pololu #2804 This RC relay enables easy control of large, electrically isolated loads in radio control (RC) systems. The activation threshold and direction are configurable, and a safe-start feature reduces the likelihood of unexpected activation.
Delivered in 5 to 14 days
€ 16,70 Incl. VAT
Opencircuit Solid state relais 3-32V / 10A / 24-380VAC Solid state relays are more economical than mechanical relays because they require a much lower current to be switched.
Delivered in 14 to 30 days
€ 6,45 Incl. VAT
Whadda Multifunction relay switch Whadda #WST8015 This kit is very interesting if you want to learn more about electronics. This multifunctional relay module can operate in 14 different modes: timers, switching, flashing, interval, random switching, delays from 2s to 12 days, push button operation, and so on.
Delivered in 3 to 7 days
€ 19,30 Incl. VAT
Opencircuit Solid state relais 3-32V / 10A / 5-60VDC This relay can switch a voltage from 5V to 60VDC with a current of up to 10A. The relay accepts a control voltage from 3V to 32V DC. The relay is equipped with 4 screw terminals.
Delivered in 14 to 30 days
€ 4,65 Incl. VAT
Opencircuit 12V 10A relay 12V Relay with a switching capacity of 10A. By means of a relay, a circuit with much more power (10A, 250VAC) can be switched with a relatively small current.
Delivered in 14 to 30 days
€ 2,20 Incl. VAT
SparkFun Qwiic Dual Solid State Relay Sparkfun #COM-16810 Control two AC loads efficiently with the SparkFun Qwiic Dual Solid State Relay. Features 25A/250VAC solid state relays, ATTiny84 power, and safety features. Ideal for experienced users.
Delivered in 5 to 10 days
€ 68,00 Incl. VAT
SparkFun Qwiic Single Relay Sparkfun #COM-15093 Control high-power devices with the SparkFun Qwiic Single Relay. Designed for low-power microcontrollers like Arduino, it can handle up to 5.5A at 240VAC. Easy to connect with no soldering required.
Delivered in 5 to 10 days
€ 21,00 Incl. VAT
Whadda Interval timer module - WMT136 Whadda #WMT136 The WMT136 Interval Timer is your solution for reliable and fast timing tasks. Easy to connect to a 12V external power supply and flexible for various applications.
Delivered in 3 to 7 days
€ 14,85 Incl. VAT
Opencircuit Timer relay module - 12V This timer relay module has multiple functions, with a total of 24 working modes. The maximum switching current is 20A and the output is isolated from the circuit by a relay, which can control low‑voltage electrical appliances, direct current, etc.
Delivered in 14 to 30 days
€ 8,10 Incl. VAT
Whadda Dmx-controlled relay switch Whadda #WSL8072 This Kit allows you to control a relay by means of the well-known DMX512 protocol. This protocol was developed by USITT in 1986 to control dimmers, scanners, moving-head spots and other lighting devices with a simple wiring.In some cases, a simple ON/OFF selection is desired.
Delivered in 3 to 7 days
€ 20,20 Incl. VAT
Whadda Din rail wlan relay card Whadda #VM208 This new DIN rail WLAN relay card combines the strength of four robust relays that you can control via smartphone. In other words: this device enables you to remotely control any appliance in your electrical cabinet from anywhere in the world*!
Delivered in 3 to 7 days
€ 145,85 Incl. VAT
Whadda Din-rail extension relay card Whadda #VM208EX Upgrade your DIN-rail relay card (VM208) with 8 additional relays of 16 A @ 230 VAC.FeaturesI2C protocol communicationextends the with 8 additional relayspowered by thecan be controlled by an Arduino development board (VM208INT – coming soon!
Delivered in 3 to 7 days
€ 77,55 Incl. VAT
Kitronik Relay Control Breakout Board Kitronik #5101 This breakout board allows a low power logic level device running at 5V to operate a relay. The relay can switch up to 16A 250VAC or 16A 30VDC. This lets your low power microprocessor control big, power hungry devices!
Delivered in 5 to 30 days
€ 14,85 Incl. VAT
Adafruit ISO1540 Bidirectional I2C Isolator Adafruit #4903 The Adafruit ISO1540 provides full electrical isolation between two sides of an I2C bus, powered by the TI ISO1540 chip, with 2500 V-RMS isolation and support for clock rates up to 1 MHz.
Delivered in 10 to 30 days
€ 10,25 Incl. VAT
Pimoroni HT0740 40V / 10A Switch Breakout - PIM455 Pimoroni #PIM455 Oh boy, this is a Big Switch. Program it to switch loads up to 40V / 10A connected to the HT0740 breakout's sturdy screw terminals, and use up to four breakouts at the same time using the...
Delivered in 5 to 30 days
€ 16,90 Incl. VAT
Whadda WPM406 5V Relay module Whadda #WPM406 This relay acts as an electronic switch to control the current of a circuit. This module can be controlled via 5V supplied by the Arduino for example.
Out of stock
€ 6,00 Incl. VAT
Whadda 4 Channel relay module Whadda #WPM400 With this 4-channel relay module you can control various circuits or devices with high current. The module can be controlled directly via a microcontroller, such as the Arduino.
Out of stock
€ 10,50 Incl. VAT
Whadda Relay with delay - 1s / 60h - WST188 - kit Whadda #WST188 The WST188 Pulse/Pause Timer lets you adjust both the pulse and pause times between 1 second and 60 hours. Easily connected to a 12-24 VDC power supply and equipped with a powerful 16 A relay, this timer is the ultimate choice for a wide range of applications.
Delivered in 3 to 7 days
€ 16,60 Incl. VAT
Whadda Twilight switch - WSL125 - construction kit Whadda #WSL125 The WSL125 is an educational soldering kit with a twilight switch that automatically controls your lighting based on the lighting conditions. Easy to assemble, adjustable sensitivity and works on 12VDC. Ideal for gardens, driveways and more.
Out of stock
€ 8,95 Incl. VAT
SparkFun Beefcake Relay Control Kit (Ver. 2.0) Sparkfun #KIT-13815 The SparkFun Beefcake Relay Control Kit (Ver. 2.0) is a powerful tool for 5V systems, capable of handling 10A on NC contacts and 20A on NO contacts at 220VAC. Ideal for controlling high-power loads.
Delivered in 5 to 10 days
€ 14,25 Incl. VAT
Sparkfun Solid State Relay - 40A (3-32V DC Input) Sparkfun #COM-13015 The Sparkfun Solid State Relay - 40A offers superior control of high-current AC loads. With a 3-32V DC input, zero cross trigger control, and 7.5mA/12V trigger current, it's ideal for lighting...
Delivered in 5 to 10 days
€ 17,00 Incl. VAT
Arduino 4 Relay Shield Arduino #A000110 The Arduino 4 Relays Shield is a practical solution for controlling high-power loads that cannot be controlled directly by the digital I/O pins of an Arduino due to
Delivered in 14 to 30 days
€ 29,00 Incl. VAT
Arduino Pro Opta Ext D1608E Arduino #7630049204096 Transform your Arduino Opta into a powerhouse of real-time control and monitoring capabilities with the addition of the Arduino Pro Opta Ext D1608E module.
Delivered in 14 to 30 days
€ 167,00 Incl. VAT
New

DFRobot ETH008-B Relay Module - 8 relays - 16A per Output DFRobot #DFR0146 The ETH008-B is a powerful relay module with eight 16A relay outputs for diverse electrical applications. Powered by 12V DC, it supports both regulated and unregulated inputs. Featuring SPCO relays, screw terminals, LED indicators, and ethernet connectivity, it excels in managing AC/DC loads and motors.
Delivered in 5 to 10 days
€ 93,75 Incl. VAT

The 3 most popular Relay modules

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By means of a relay, a circuit with much more power can be switched with a relatively small current.

Customer reviews about Relay modules

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BenOpencircuit Temperature controlled relay 12V - W1209 I first had a defective 12V adapter, which caused the relay, LED and display to flash "0F0". With a good 12V adapter the relay works fine.
Don A.Opencircuit 24V Relay 10A Great relay + received quickly
DennisSparkFun Qwiic Single Relay Handy module for switching via microcontrollers. Easy to connect with the Qwiic system, without soldering. Works fine via I2C and is reliable under high load.
AnonymousOpencircuit 5V Relay module 2 channels Product is exactly as described and works well. Perhaps a small manual could have been included about the inputs (low active) and the jumper for separate power supply.
GuidoOpencircuit Relay module 5V The product meets expectations and the description on the website. It was delivered very quickly!
JanOpencircuit Solid state relais 3-32V / 40A / 24-380VAC Good relay
W. GrachtOpencircuit 5V Relay module 8 channels Works well, with 8 channels there are quite a few options to control devices. The optocouplers keep the signal safely isolated.
Rob VerwerOpencircuit 5V relay with adjustable delay (0S - 10S) You simply need to have such a module in stock.