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Relay modules

Products: 60
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Iduino relay 2 channel module with optoisolation - 10A / 240VAC contacts - 5V coil

Module with two SRD-05 relays with the coil powered with a voltage of 5 V and optical insulation of the input, and with the mounting holes. The system allows you to control...
5.0 (13)
Index: OST-14266
Index: OST-14266
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Regular price €2.90 Price €2.90

Relay module 1 channel with optoisolation - 10A/250VAC contacts 5V coil

The module is equipped with relay SRD-05 with coil powered with a voltage of 5 V with optical isolation of input and mounting holes. The system allows you to control actuators...
4.6 (12)
Index: MOD-01997
Index: MOD-01997
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Regular price €1.90 Price €1.90

Relay 2 channel module with optoisolation - 10A/250VAC contacts - 5V coil

The module has two relays SRD-05 with a coil powered with a voltage of 5 V with optical isolation of input and mounting holes. The system allows you to control the actuators...
4.9 (16)
Index: MOD-02170
Index: MOD-02170
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Regular price €2.00 Price €2.00

Relay module combined light-operated switch 12V 10A/250VAC

The module is equipped with SRD-12 relay with a coil powered with a voltage of 12 V with mounting holes. The system allows you to control the actuators depending on the...
4.8 (6)
Index: MOD-06253
Index: MOD-06253
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Regular price €4.90 Price €3.92
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8 channel optoisolation relay module - 10A/250VAC contacts - 12V coil - red

The module has eight SRD-12 relays with a coil powered with the voltage of 12 V, with optoelectronic insulation. The system allows you to control the actuators using the...
5.0 (6)
Index: MOD-02699
Index: MOD-02699
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Regular price €11.50 Price €11.50

Relay module 1 channel - 10A/250VAC contacts - 5V coil

The module is equipped with relay JQC-3FF-S-Z with coil powered with voltage 5 V without optical isolation of input. The system allows you to control actuators with...
5.0 (8)
Index: MOD-08228
Index: MOD-08228
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Regular price €1.90 Price €1.90

Relay module 4 channels + Bluetooth 4.0 BLE - 10A / 250V contacts - 5V coil

The module has four SRD-05 relays with a coil powered with the voltage of 5 V, it was also equipped with a module Bluetooth 4.0 BLE allowing ot control the devices via Android...
4.0 (1)
Index: GRL-10909
Index: GRL-10909
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Regular price €45.00 Price €36.00
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Optoisolation relay module 8 channel - 10A/250VAC contacts - 12V coil - blue

The module has eight relay with a coil powered with a voltage of 12 V along with optoelectronic insulation. The system allows you to control actuators with microcontroller...
5.0 (5)
Index: MOD-03285
Index: MOD-03285
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Regular price €6.90 Price €6.90

Relay module 2 channels - 10A/250VAC contacts - 5V coil

Dual module is equipped with  SRD-05 relays with the coil powered with the  voltage of 5 V , the transistor amplifier and mounting holes. The system allows you to control...
5.0 (2)
Index: MOD-02043
Index: MOD-02043
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Regular price €2.90 Price €2.90

Relay 5V 10A/250VAC

The module is equipped with relay SRD-5VDC-SL-C with coil powered with a voltage of 5 V. T he systems allows you to control actuators with microcontroller ports or with any...
4.9 (15)
Index: MOD-08463
Index: MOD-08463
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Regular price €1.90 Price €1.90

Transistor switch with adjustable delay - 15A / 36V

The module equipped with transistors powered with the voltage from 5 V to 36 V. T he system allows you to control actuators using microcontroller ports or any development set ....
5.0 (6)
Index: GRL-12126
Index: GRL-12126
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Regular price €3.50 Price €3.50

Relay 8 channel module with optoisolation - 10A / 250VAC contacts - 5V coil - Modbus RS485 - Waveshare 17658

The module has 8 relays capable of switching 230 V AC or 30 V DC and a maximum current of 10 A . The relay coil is energized by 5 V. The module communicates via RS485...
Index: WSR-16406
Index: WSR-16406
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Regular price €32.90 Price €32.90

Tinycontrol LANKON-094 - relay module 4x10A /coil 5V for GSM/LAN controller - for DIN rail

The module is equipped with 4 RELPOL RM50 relay a coil supplied with a voltage of 5V, with optical isolation input and mounting holes. The system is designed to work with LAN...
Index: TNC-08293
Index: TNC-08293
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Regular price €18.00 Price €18.00

Ardi Relay - 4 channel relay - overlay for Arduino Uno - SB Components SKU27194

Ardi Relay from SB Components is an expansion board equipped with 4 relays with opto-isolation ensuring electrical separation. Additionally, built-in LEDs , separate for...
Index: SBC-23658
Index: SBC-23658
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Regular price €9.00 Price €9.00
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Pico Dual Channel Relay HAT

Module in a form of overlay for Raspberry Pi Pico with two relays, created by SB Components. The board consists of two relays with opto-isolation protection. There is also a...
5.0 (2)
Index: SBC-19628
Index: SBC-19628
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Regular price €11.50 Price €11.50

Gravity - snap-on 10A/250VAC magnetic relay - for Arduino and ESP32 - DFRobot DFR0996

Magnetic latching relay 10 A / 250 V AC from DFRobot. Compared to other relays, it is distinguished by the fact that it needs two digital pulse signals to switch the ON /...
Index: DFR-22838
Index: DFR-22838
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Regular price €7.90 Price €7.90

Relay module for Raspberry Pi Pico - 1 channel with optoisolation - 7A/250VAC 10A/30VDC contacts - 5V coil

Module with relay working with Raspberry Pi Pico produced by SB Components. Made of high quality materials, the overlay is the perfect solution for switching loads in Pico...
3.0 (1)
Index: SBC-22072
Index: SBC-22072
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Regular price €10.50 Price €10.50

Raspberry Pi Pico Relay Board

Relay module for Raspberry Pi Pico created by SB-Components company. The board comes with 4 relays and a socket to plug in the module with Raspberry Pi Pico microcontroller....
5.0 (2)
Index: SBC-19629
Index: SBC-19629
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Regular price €17.90 Price €17.90

Relay module 1 channel - 3A/250VAC contacts - 5V coil

The module is equipped with  HK4100F relay with the voltage of 5 V. T he system allows you to control the actuators with a voltage of 250 V AC / 30 V DC , using the ports...
5.0 (2)
Index: OST-14297
Index: OST-14297
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Regular price €1.90 Price €1.90

Optoisolation relay module 6 channel - 10A/250VAC contacts - 5V coil

The module has six JQC-3FF-S-Z relays with a coil powered with a voltage of 5 V along with optoelectronic insulation. The system allows you to control actuators with...
4.9 (8)
Index: MOD-08223
Index: MOD-08223
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Regular price €5.90 Price €5.90

Relay module Iduino 4 channels - 10A/250VAC contacts - 5V coil

Module with four SRD-05 relays with a 5 V coil and optical insulation of the input as well as mounting holes. The system allows you to control the actuators by means of...
5.0 (2)
Index: OST-14480
Index: OST-14480
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Regular price €4.90 Price €4.90

16-channel relay module with optoisolation - 10A / 250VAC contacts - 12V coil

The module is equipped with sixteen JQC3F-12VDC-C relays with a 12-volt coil with optoelectronic isolation. The system allows you to control the actuators using the...
4.9 (8)
Index: MOD-06941
Index: MOD-06941
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Regular price €13.50 Price €13.50

Inveo LanTick Pro PE-2-2 - IoT relay module

Inveo modules allow remote control of devices via Internet. It has 2 relay outputs of 250V and 2 binary inputs operating in counter mode. The module is controlled through the...
5.0 (1)
Index: INV-09117
Index: INV-09117
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Regular price €151.00 Price €151.00

DFRobot Gravity v2.0 - relay 1 channel - 277VAC / 16A contacts - 5V coil

Module with relay that allow for the control of the actuators through the ports of the microcontroller. The kit includes a cable adapted to DFRobot IO Expansion Shield.
5.0 (1)
Index: DFR-11262
Index: DFR-11262
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Regular price €10.90 Price €10.90

What is a relay and how does it work?

Relay modules offered in our store are electrical and electronic devices whose task, under certain conditions, is to suddenly change state in one or more output circuits. A relay responds to a change in an input physical quantity such as voltage, current, pressure or temperature in such a way that when it exceeds a certain level, the signal changes in steps, usually by means of "on" or "off" commands.

Applications for relays

Through their operation, relays allow a higher amplitude or voltage level to have an effect in circuits. There are overcurrent and undercurrent relays that respond to a change in the measured quantity above or below a certain level. An example is an overcurrent relay, which will trip when the current flowing through it exceeds a certain value. We offer relay modules ready to be implemented into the system or model being designed.

Optoisolation

Our relay modules are equipped with opto-isolation. What is optoisolation? It is nothing as complicated as it may seem. Optoisolation is separating individual circuits from each other by means of signal control. This is possible by using an optocoupler, which sends control signals in such a way as to electrically isolate these circuits. The process of optocoupling allows us to protect selected circuit elements - usually the most expensive ones in our system.

The difference between a contactor and a relay

What is the difference between these two systems, if the principle of their operation is the same? It lies in the systems in which they are used. Contactors are devices for switching high-current systems - for example, electric motors, and relays in low-current systems or signals with zero potential - for example, in the programming of logic controllers. This also results in a much longer life of relays than of contactors (several million connections on relays, to a few thousand on contactors).