Filter by

Channels
more (3) ok clear
Interface
more (2) ok clear
Filter

Promotion products

Recomendations

Relays

Products: 126
Loading...

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €1.78 Price €1.78

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €2.00 Price €2.00

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €3.13 Price €3.13

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €4.95 Price €4.95

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €1.78 Price €1.78

Relay NT73-2C-S12 - 5V coil, 2x 12A/125VAC contacts

Coil voltage: 5, contacts: 12 A / 125 V AC. Dimensions: 19.5 x 15.6 mm, height: 15,3 mm.
Index: PAS-01565
Index: PAS-01565
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.83 Price €0.83

Relay NT73-2C-S12 - 12V coil, 2x 12A/125VAC contacts

Coil voltage: 12 VDC, contacts: 12 A / 125 V AC. Dimensions: 19.5 x 15.6 mm, height: 15,3 mm.
Index: PAS-02840
Index: PAS-02840
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.72 Price €0.72

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...
Index: MOD-02043
Index: MOD-02043
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €2.23 Price €2.23

HLS8L-DC5V-S-C relay - 5V coil, 2x 15A/120VAC contacts

Coil voltage: 5 V, contacts: 15A/120VAC. Dimensions: 19 x 15.5 mm, height: 15.8 mm.
Index: PAS-01917
Index: PAS-01917
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.61 Price €0.61

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €3.31 Price €3.31

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €2.18 Price €2.18

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €2.23 Price €2.23

Relay module semiconductor SSR 2A 1 channel - 240VAC / 2A contacts. 5VDC coil

The module is equipped with 1-channel relay, semiconductor SSR with a constant control voltage of 5 V DC and AC voltage switching between the values from 100 VAC to 240 VAC....
Index: DNG-10161
Index: DNG-10161
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €3.04 Price €3.04

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

The module is equipped with sixteen SRD-12 relays with a 12-volt coil with optoelectronic isolation. The system allows you to control the actuators using the microcontroller...
Index: MOD-06941
Index: MOD-06941
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €13.28 Price €13.28

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...
Index: OST-14266
Index: OST-14266
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €2.59 Price €2.59

Relay NT73-2A-S12-05 - 5V coil, 12A/125VAC contacts

Coil voltage: 5 V, contacts: 12 A / 125 V AC. Dimensions: 18,8 x 15,2 mm, height: 15 mm.
Index: PAS-04868
Index: PAS-04868
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.65 Price €0.65

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...
Index: MOD-02699
Index: MOD-02699
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €8.98 Price €8.98

MPA-S-112-C relay - 12V coil, 1x 10A / 250VAC contacts

Coil voltage: 12 V, contacts: 10 A / 250 VAC. Dimensions: 18,7 x 15 mm, height: 15.2 mm.
Index: PRO-11588
Index: PRO-11588
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.45 Price €0.45

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
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €0.79 Price €0.79

Grove - relay module v1.2

Relay module with Grove connector in 1.2 version. It allows you to control the executive elements by cutting off or supplying power. For proper operation it requires a 5 V...
Index: SEE-11347
Index: SEE-11347
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €1.91 Price €1.91

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 €0.90 Price €0.90

MPJ2-S-205-C relay - 5V coil, 2x 5A / 240VAC contacts

Coil voltage: 5, contacts: 5 A / 240 VAC. Dimensions: 29 x 12.6 mm, height: 20,6 mm.
Index: PRO-11595
Index: PRO-11595
Shipping in 24 hours
In stock, shipping 24 hours!
(Check quantity)
Regular price €1.24 Price €1.24

Solid state relay SSR-40A 440VAC / 40A - 32VDC

Solid state single phase SSR with 440 V AC and 32 V DC. The rated current is 40 A.
Index: AKS-10219
Index: AKS-10219
Shipping in 24 hours
Available, 24 hours shipping!
(Check quantity)
Regular price €9.90 Price €9.90

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
Shipping in 24 hours
Available, 24h shipping!
(Check quantity)
Regular price €10.96 Price €10.96

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.