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Relay modules

Products: 74
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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...
Index: MOD-02170
Index: MOD-02170
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Regular price €1.96 Price €1.96

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...
Index: OST-14266
Index: OST-14266
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Regular price €2.53 Price €2.53

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...
Index: MOD-01997
Index: MOD-01997
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Regular price €1.74 Price €1.74

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

Quadruple module is equipped with SRD-05 relay with a coil powered with the voltage of 5 V, the transistor amplifier and mounting holes. The system allows you to control...
Index: MOD-01998
Index: MOD-01998
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Regular price €3.23 Price €3.23

Relay 5V 10A/250VAC

The module is equipped with relay JQC-3FF-S-Z with coil powered with a voltage of 5 V. T he systems allows you to control actuators with microcontroller ports or with any...
Index: MOD-08463
Index: MOD-08463
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Regular price €1.74 Price €1.74

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

The module is equipped with four relays JQC-3F with a coil powered with a voltage of 5 V with optical isolation of input and mounting holes. The system allows you to control...
Index: MOD-02579
Index: MOD-02579
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Regular price €3.06 Price €3.06

Module relay semiconductor SSR 2A4 channels - 240VAC / 2A contacts 5VDC coil - keyes

The module is equipped with a 4-channel, solid-state SSR relay with 5 VDC DC control voltage and switching AC voltage from 100 VAC to 240 VAC. Nominal current is 2 A. The unit...
Index: OST-15068
Index: OST-15068
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Regular price €10.71 Price €10.71

Relay Hat for Raspberry Pi - 8 relays with optoisolation - 5A / 250VAC / 30VDC contacts - 5V coil - Waveshare 15423

The module with the HAT shield for Raspberry Pi is equipped with eight HLS8L relays with a coil powered with a voltage of 5 V along with optoelectronic insulation. The system...
Index: WSR-13301
Index: WSR-13301
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Regular price €22.44 Price €22.44

Semiconductor Relay moduleSSR 2 channels - 240VAC / 2A contacts 5VDC coil - keyes

The module is equipped with a 2-channel, solid-state SSR relay with 5 VDC DC control voltage and switching AC voltage from 100 VAC to 240 VAC. Nominal current is 2 A. The unit...
Index: OST-15067
Index: OST-15067
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Regular price €5.72 Price €5.72

Solid state relay module SSR 2A 1 channel - contacts 240VAC / 2A 5VDC coil

SSR 1-channel solid-state relay module with 5 VDC DC control voltage and switching AC voltage from 100 VAC to 240 VAC. Nominal current is 2 A. The unit does not generate...
Index: OST-16280
Index: OST-16280
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Regular price €2.97 Price €2.97

Relays module, 8 channels with opto-isolation - 10A/250VAC contacts - 5V coil - blue

The module has eight relays SRD-05 with coil powered with a voltage of 5 V along with optoelectronic isolation. The system allows you to control actuators with microcontroller...
Index: MOD-02966
Index: MOD-02966
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Regular price €4.84 Price €4.84

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 ....
Index: GRL-12126
Index: GRL-12126
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Regular price €5.04 Price €5.04

Sonoff Mini R2 - 240V WiFi relay - Android / iOS app

Ready-made 240 V relay module with small dimensions, so it can be mounted in a flush-mounted box. The device is controlled via a WiFi network using the eWeLink application...
Index: DNG-15925
Index: DNG-15925
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Regular price €9.88 Price €9.88

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

Quadruple module is equipped with SRD-05 relay with a coil powered with the voltage of 5 V, the transistor amplifier and mounting holes. The system allows you to control...
Index: VEL-13900
Index: VEL-13900
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Regular price €8.78 Price €8.78

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...
Index: OST-14480
Index: OST-14480
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Regular price €5.48 Price €5.48

DFRobot Gravity - relay 1 channel - 10A/277VAC contacts - 5V coil

Module with relay that allows for the control of the actuators consuming the current of up to 12 A for the voltage of 125 V or 10 A for 277 V through the ports of the...
Index: DFR-05964
Index: DFR-05964
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Regular price €2.53 Price €2.53

Numato Lab - 4-channel relay module 12V 7A/250VAC + 6GPIO - USB

The module is equipped with four relays JQC-3FC with a coil supplied with voltage of 12 V. The system is controlled directly from the USB connector. In addition, the module has...
Index: MOD-08600
Index: MOD-08600
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Regular price €59.18 Price €59.18

Coolseer WiFi Switch Module - 230V WiFi relay - COL-SM01W

A ready-made module to control 230 V to 2300 W home appliances from anywhere in the world via WiFi with a dedicated application or via voice commands. Small dimensions...
Index: CLR-15008
Index: CLR-15008
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Regular price €20.90 Price €16.72
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Semiconductor Relay moduleSSR 8 channels - 240VAC / 2A contacts 5VDC coil - keyes

The module is equipped with an 8-channel, solid-state SSR relay with 5 VDC DC control voltage and switching AC voltage from 100 VAC to 240 VAC. Nominal current is 2 A. The unit...
Index: OST-15066
Index: OST-15066
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Regular price €19.78 Price €19.78

Gravity - relay module - with DC-USB adapters - DFRobot DFR0643

Relay module included with DC adapters manufactured by DFRobot. It has a built-in Gravity connector , which allows to reduce the number of connection wires, making it...
Index: DFR-19032
Index: DFR-19032
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Regular price €8.78 Price €8.78

Relay module DPDT 1 channel - 1A / 125VAC contacts - 12V coil

Single channel 12 V DPDT relay module equipped with two pairs of changeover contacts. For proper operation it is sufficient to connect the relay power supply and a 12 V...
Index: AKS-19501
Index: AKS-19501
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Regular price €4.99 Price €4.99

Coolseer WiFi and RF Breaker - relay 230V WiFi + RF 433MHz - COL-BSW02W

Ready-made module to control 230 V to 2300 W home appliances from anywhere in the world via WiFi using a dedicated application, radio at 433 MHz or via voice commands. Quick...
Index: CLR-15011
Index: CLR-15011
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Regular price €12.98 Price €10.38
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Remote controller 12/24V DC - 433.92Mhz - 2 channels

The radio receiver allows you to control 2 devices operating at 250 V AC via NO/NC relay outputs. The module operates at 433.92 MHz, 2 remote controls are included to control...
Index: ELB-16010
Index: ELB-16010
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Regular price €21.78 Price €21.78

Grove - Solid State Relay - module with SSR 250VAC / 4A relay

Module from the Grove series with the SSR relay module with a control voltage of 3.3 V or 5 V and the maximum contact voltage of 250 V AC and 4 A. Thanks  to the application...
Index: SEE-11349
Index: SEE-11349
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Regular price €26.18 Price €26.18

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).