Filter by

Channels
more (2) ok clear
Interface
more (4) ok clear
Filter

Promotion products

Relays

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.

Products: 129
Loading...

Numato Lab - 2-channel relay module 12V 7A / 240VAC + 8GPIO - Bluetooth

The module has two KT-603 relay with a coil supplied with 12 V voltage. The system is controlled via a Bluetooth interface. In addition, the module has 8 GPIO pins working as...
Index: MOD-11657
Index: MOD-11657
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €39.30 Price €39.30

Numato Lab - 8-channel relay module 12V 7A / 240VAC + 1GPIO - Bluetooth

The module has eight KT-603 relays with a coil supplied with voltage of 12 V. The system is controlled via a Bluetooth interface. In addition, the module is equipped with 1...
Index: MOD-11658
Index: MOD-11658
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €57.91 Price €57.91

Numato Lab - 8-channel relay module 12V 7A / 240VAC + 10GPIO - Ethernet

The module has eight KT-603 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 pins...
Index: MOD-11659
Index: MOD-11659
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €97.44 Price €97.44

Semiconductor relay SSR-100A 480VAC / 100A - 32VDC

Solid state relay, single-phase SSR with the AC voltage of 480 V and constant of 32 V. Rated current is 100 A. The device does not create noise when switching.
Index: AKS-10221
Index: AKS-10221
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €19.53 Price €19.53

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €27.67 Price €27.67

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
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €13.72 Price €13.72

DFRobot Gravity - 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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €10.44 Price €10.44

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
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €22.09 Price €22.09

2 Channel USB Powered Relay Module

The module has two relays KT-450  with   a   coil  with a 5V voltage. The circuit is operated directly from the USB connector. In addition, the module provides 4 GPIO...
Index: MOD-08599
Index: MOD-08599
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €32.33 Price €32.33

Numato Lab - relay module 1 channel - 1A / 120VAC contacts - 5V + 4GPIO coil - USB

The module is equipped with one KT-450 relaywith a coil suppied with voltage of 5 V. The system is controlled directly from the USB connector. In addition, the module provides...
Index: MOD-08601
Index: MOD-08601
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €27.21 Price €27.21

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
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €28.14 Price €28.14

Numato Lab - 16-channel relay module 24V 7A/240VAC + 10 GPIO - USB

The module is equipped with 16 relays with a 24 V coil and a 7 A / 240 V contact rating. Additionally it is equipped with 10 GPIO pins, including 5 analogue inputs with...
Index: NUM-16027
Index: NUM-16027
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €104.42 Price €104.42

Coolseer WiFi Breaker - relay 230V WiFi + RF 433MHz - COL-BSW01W

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.
Index: CLR-15010
Index: CLR-15010
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €12.07 Price €12.07

Relay MCB-S-224-C-S - 24V coil, 2x 1A / 125VAC contacts

Coil voltage: 24 V, contacts: 1 A / 125 VAC. Dimensions: 20,2 x 10 mm, height: 11.5 mm.
Index: PRO-11586
Index: PRO-11586
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.81 Price €0.81

Tinycontrol GSMKON-018 - relay board 5x 16A / coil 12V for GSM / LAN controller

The module is equipped with 5 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-08292
Index: TNC-08292
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €30.23 Price €30.23

FeatherWing Non-Latching Mini Relay mini relay 250V/0.6 A - Shield for Feather - Adafruit 2895

The module from the Feather family is equipped with non-latching relay. It allows you to control actuators via the microcontroller. The maximum current is 2 A (at 40 V) and...
Index: ADA-06018
Index: ADA-06018
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €10.44 Price €10.44

Relay Hat for Raspberry Pi - 2 relays 240V/10A

Shield for Raspberry Pi 2, with two relay RM50-3011 with settings of 240 V / 10 A. Board has a screw connection, as well as a place to prototype systems. It communicates...
Index: MSX-04555
Index: MSX-04555
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €20.47 Price €20.47

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €27.67 Price €27.67

Tinycontrol GSMKON-101 - relay board 1x 16A / coil 12V for GSM / LAN controller

The module is equipped with 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 LAN...
Index: TNC-08289
Index: TNC-08289
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €4.47 Price €4.47

Relay MCB-S-212-C-S - coil 12V, contacts 2x 1A / 125VAC

Coil voltage: 12 VDC, contacts: 1 A / 125 VAC. Dimensions: 20,2 x 10 mm, height: 11.5 mm.
Index: PRO-11585
Index: PRO-11585
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.93 Price €0.93

Tinycontrol LANKON-094 - relay module 4x 10A / coil 5V for GSM / LAN controller - for DIN rail

The module is equipped with 5 Relpol 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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €16.72 Price €16.72

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €18.58 Price €18.58

RLY-8-POE-USB - 8 relays 270V / 10A - USB / Ethernet PoE driver

The controller with eight relays operating with voltages up to 277 V AC and current up to 10 A allows the control of devices supplied with mains voltage. The device is...
Index: DFR-05961
Index: DFR-05961
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €59.77 Price €59.77

iNode Care Relay - Bluetooth relay

iNode Care Relay is a programmable Bluetooth 4.0 transmitter, working with iNode Care Sensor. Designed for home automation.
Index: INO-09948
Index: INO-09948
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €25.35 Price €25.35

What are the relays used for?

The primary function of the relays is usually 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. Relays were mainly used in very large quantities in electromechanical PSTN telephone switching systems; they are still used, but to a lesser extent as they have been replaced by electronics and computers. Relays can also be used to create suitable logic functions, as was the case with the first computers or in pinball machines. This is still the case in many signal boxes, designed before the 1990s. Relays were used in very large quantities in electromechanical PSTN telephone switching systems; they are still used, but to a lesser extent because they have been replaced by electronics and computers in today's switches. The service life of low-end electromagnetic relays is relatively short due to wear and tear on the contacts during repeated switching. However, there are solutions to extend the life of these relays. Some relays are designed and tested to withstand a minimum of 10 million operations.

Evolution of the electromechanical relays

The fully electronic, solid-state relays advantageously replace the electromechanical relays in many situations. Why is that so? Better switching speed, quiet operation, insensitivity to vibrations, are some of its advantages over electromechanics. On the other hand, it can poorly withstand high short-circuit currents, even though it is generally equipped with internal protection. It cannot be used either as a safety cut-off, because of the leakage current and the permanent short circuit that can be generated when the component flashes (unlike the electromechanical relay which sometimes "sticks" but, most often, opens when the current returns to zero). Several so-called "safety" relays are designed to offer a guarantee of opening in the event of a failure. For fixed railway applications (signaling) these relays must usually comply with certain standard which depend on the country. Most railway networks use relays of a very similar design. The search for alternative solutions using solid state relays has not been successful so far because the probabilities of the different failure modes are too close.

Which type of relay to choose?

The electromechanical relay, by its switching principle, is similar to a mechanical switch whose operation would not be manually, but from the power supply of a coil called excitation coil or control coil. The coil excitation field creates a magnetic field even when it is traversed by a weak current. It then causes the opening or closing of a switch connected in series in a circuit containing a motor or a lamp, consuming a high current. This is why it is called power adaptation because the relay can control a power greater than the excitation power. Most of the time, it will be associated with a transistor. On the other hand, a solid state relay has no moving parts. The transmission of information is carried out by infrared using photo-triac, phototransistor or photodiode associated with a control circuit. This absence of moving parts gives it a longer life and an absence of noise during use. If you have questions or concerns, please contact our technical department. The topic of relays may seem complicated, but we will be happy to share our experience with you and advise you on the best solution for your situation.