A relay is an electrical device that distributes power based on an order issued by the control part. In this way, a relay allows the opening and closing of an electrical power circuit based on logical information. The primary function of relays is most often to separate the control circuits from the power circuits for isolation purposes, e.g. to drive a high voltage or current from a lower control, and in some applications also to ensure operator safety. Although it may sound complicated, it is one of the principles of eclectic networks and can help us understand how electronic gadgets work on connectivity. In this section of the Botland store you can find many relays that will help you to explore the secrets of this learning and help you gain the right skills. If you have any questions or concerns, do not hesitate to contact our technical department. We are happy to share our knowledge and experience.
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Relays
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16 channel relay module with optical insulation - contacts 10A/250VAC - coil 5V
The module has sixteen relays SRD-05 with a coil powered with a voltage of 5 V along with optoelectronic insulation. The system allows you to control the actuators with...
Index: MOD-06940
Index: MOD-06940
Relay MPJ2-S-212-C - 12V coil, 2x 5A / 240VAC contacts
Coil voltage: 12 V, contacts: 5 A / 240 VAC. Dimensions: 29 x 12.6 mm, height: 20,6 mm.
Index: PRO-11597
Index: PRO-11597
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Relay module 2 channels H/L with optoisolation - contacts 10A/250VAC - coil 12V
The module has two SRD-05 relays with the coil powered with the voltage of 12 V with the optical insulation of the input and mounting holes. The system allows you to control...
Index: MOD-06552
Index: MOD-06552
Relay module 2 channels H/L with optoisolation - 10A/250VAC contacts - 5V coil
The module has two SRD-05 relays with the coil powered with the voltage of 5 V with optical isolation of the input and mounting holes. The system allows you to control...
Index: MOD-06551
Index: MOD-06551
Numato Lab - 8-channel relay module 12V 10A/250VAC + 10GPIO - Ethernet
The module has eight HF3FF 012-1ZST relay with a coil supplied with voltage of 12 V. The system is controlled via Web interface or TELNET. In addition, the module has 10 GPIO...
Index: MOD-11659
Index: MOD-11659
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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.
Index: DFR-11262
Index: DFR-11262
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...
Index: MOD-06253
Index: MOD-06253
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Tinycontrol GSMKON-010 - relay board 4x16A/coil 12V for GSM/LAN controller
The module is equipped with 4 Relpol relay a coil supplied with a voltage of 12V, with optical isolation input and mounting holes. The system is designed to work with GSM and...
Index: TNC-08291
Index: TNC-08291
Three-phase Solid state relay SSR Hoymk D4825HK 3x25A 380VAC / 32DC
The Hoymk D4825HK three-phase relay is made in semiconductor technology and controlled with voltages from 3 V to 32 V DC. The maximum output voltage is 380 V.
Index: DLT-14507
Index: DLT-14507
Grove - 2-channels relay with optoisolation - 10A/250VAC - coil 5V + clear case
The module has two SRD-05 relays with the coil powered with the voltage of 5 V with optical insulation of input and mounting holes. The system allows you to control...
Index: SEE-12626
Index: SEE-12626
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...
Index: GRL-10909
Index: GRL-10909
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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
Semiconductor relay SSR-80A 480VAC / 80A - 32VDC
Solid state relay, single-phase SSR with the AC voltage of 480 V and constant of 32 V. Rated current is 80 A. The device does not create noise when switching.
Index: AKS-10220
Index: AKS-10220
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
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
Transistor switch with adjustable delay - 15A / 30V
The module equipped with transistors powered with the voltage from 5 V to 30 V. T he system allows you to control actuators using microcontroller ports or any development set ....
Index: GRL-12126
Index: GRL-12126
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...
Index: MOD-06941
Index: MOD-06941
Inveo Nano OUT - IoT module with relay
Inveo modules allow remote control of a device via the Internet. It has 1 relay output of 250 V and a built-in WEB server.
Index: INV-09120
Index: INV-09120
Tuya RTX WRS2 - 2x relay 100-240V AC WiFi
Ready-made two-channel WiFi relay module. The device allows you to control two 100-240V AC devices with a maximum power consumption of 1150 W or two LED lighting sources...
Index: REM-16912
Index: REM-16912
Grove - relay 1 channel - 30A-250VAC / 30VDC contacts - 5V coil
Module with relay that control the actuators consuming the current of up to 30 A for the voltage of 250 V AC, 30 V DC using the ports of the microcontroller. The module is...
Index: SEE-11351
Index: SEE-11351
High-class 4-channel relay for using the maximum voltage of 250 V and a current of 10 A.
Index: SEE-14418
Index: SEE-14418
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
Optical relay LC03 - optoisolator
The input voltage from 1.6 V to 2.5 VDC, output impedance up to 10 megohms.
Index: PAS-04863
Index: PAS-04863
Relay module 1 channel with delay - 10A / 250VAC contacts - 5 V coil
The module is equipped with relay SRD-05 with a coil powered with a voltage of 5 V. The system allows you to control actuators using microcontroller ports or any development...
Index: GRL-10917
Index: GRL-10917
See also
- Computer accessories
- Automobile accessories
- Cooling
- Diodes
- Sound and acoustics
- Mounting components
- Passive elements
- Wearables (e-textiles, smart clothes)
- Cameras and recorders
- Memory cards & disks
- Communication
- Converters
- Electronics courses
- Microcontrollers
- Animal repellers
- LED lighting
- Programmers
- Voltage regulators
- Artificial intelligence
- Motor drivers and servos
- Integrated circuits
- Displays and screens
- Tablets and smartphones
- Consoles
Where are relays used?
Industry was once thought to be the main field where relays were used. There is some truth in this, because we actually find relays in many machines and powerful control systems. Currently, however, they are used to an increasing extent in everyday devices, especially if we want to ensure a higher level of automation. Relays can be found in most homes, especially those of the "smart home" type, where most things operate on commands and are extremely modern and rely on electronic systems. Moreover, relays are used, for example, for automatic entrance gates, to control ventilation or heating, and for protection systems, e.g. motion sensors.
How to choose the right relay?
If we really don't know anything about relays, but we need to buy one, please contact the technical department of the Botland store. It is important to remember that a relay that does not work properly can cause a lot of damage. It can damage electrical devices or even entire electronic systems, so don't deal with this problem alone and contact us. In our store you will find:
- relay modules
- SSR semiconductor relays
- traditional relays
Therefore, every person designing a project or gadget will find the relay they need here. It is worth relying on us because we always offer the highest quality products. Every electronics enthusiast realizes that small, inconspicuous elements are often the most important. Relays are just such a thing. Without them, the operation of electronic devices and systems, as well as machines, would in many cases be impossible.
Relays, Arduino relays - FAQ
An Arduino relay is commonly referred to as shields and modules compatible with popular motherboards , which are equipped with one or several electromagnetic relays and are used to control external loads (LED lighting, fan, heater, various network devices, etc.).
An Arduino relay is most often simply a module containing an electromagnetic relay with a simple electronic circuit that allows you to control the relay coil directly from the Arduino GPIO output. In most cases, a transistor is used for this purpose, which - after providing the appropriate logical state - turns on the relay coil, thus switching its contacts.
The principle of operation of the relay is based on the attraction of a metal anchor by a small electromagnet - the anchor, mechanically connected to movable contacts , switches the output circuits, enabling the switching on of an external load (even with high current consumption) using a small signal sent to the electromagnet coil.
Selection of a relay involves determining the basic parameters of the input ( electromagnet coil) and output (switchable contacts). In the case of a coil, the type of control voltage (AC or DC) and its value (e.g. 12 V) and current (e.g. 100 mA) are provided. The contacts are also characterized by the maximum operating voltage (e.g. 250 VAC) and current (e.g. 10 A).