Relays

Relays are electromagnetic switches powered by a relatively small current and thanks to their structure they can both switch off or amplify a much larger current. They have been largely used in the telecom industry since the 19th century, as well as in the industrial and automotive sectors. Their application has now extended to computing and medical research, making relays a fundamental component for devices used in everyday life.

How does a general purpose relay work?

Relays work based on electromagnetic force. The core of a relay is made of a coil of wire (commonly copper, which is low-resistance and facilitates power transmission) which becomes a magnet when it receives an electric current.

They work as a bridge between devices, receiving an input signal from the first one and transmitting an output to the second. The electromagnetic current generated by the electrical input from the first device on the relay causes the contacts to open or close, determining the transmission or the blockage of the electrical signal to the second device.

What is a general purpose relay used for?

There are different kinds of relays suited for different applications:

  • Latching relays: they can be operated by a magnetic or mechanical system, and can feature a single or a double-winding coil. Their position stays where it was when the circuit was last powered. They're commonly used to operate automatic doors and gates, as well as in lighting.
  • Non latching relays: differ from how latching relays work as non-latching relays go back to their initial position when the power is removed from the circuit. Normally found in push-button applications such as keyboards.
  • High frequency and RF relays: most commonly used in radio system, computing, testing and industrial equipment where high voltages are involved and standard relays cannot support an efficient function. An example of application is in radio devices: relays separate the circuits responsible for receiving and transmitting high frequency signals.

Whatever the relay is you are looking for, we offer a broad range from the most trusted suppliers worldwide, such as Panasonic, Omron, TE Connectivity and our very own RS Pro.

Automotive Relays
Automotive Relays
Earth Leakage Relays
Earth Leakage Relays
Electromechanical Interface Relays
Electromechanical Interface Relays
Force Guided Relays
Force Guided Relays
HF & RF Relays
HF & RF Relays
Monitoring Relays
Monitoring Relays
Power Relays
Power Relays
Reed Relays
Reed Relays
Safety Relays
Safety Relays
Signal Relays
Signal Relays
Solid State Interface Relays
Solid State Interface Relays
Solid State Relays
Solid State Relays
Timer Relays
Timer Relays

16592 Products showing for Relays

1 of 830
In Stock
Phoenix Contact DIN Rail Power Relay, 230V ac Coil, 8A Switching Current, DPDT
  • RS Stock No. 794-3715
  • Mfr. Part No. 2903331
Subtotal (1 unit)
Kr. 161,18(exc. VAT)
In Stock
TE Connectivity Automotive Relay, 24 V dc Coil Voltage, 30 A Switching Current, SPDT
  • RS Stock No. 535-2558
  • Mfr. Part No. V23074A1002A403 3-1393292-8
Subtotal (1 unit)
Kr. 64,57(exc. VAT)
In Stock
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail, 230V ac Coil, DPDT
  • RS Stock No. 203-5211
  • Mfr. Part No. RXG21P7PV
Subtotal (1 unit)
Kr. 275,59(exc. VAT)
In Stock
Omron G3NA Series Solid State Relay, 10 A Load, DIN Rail Mount, 240 V ac Load
  • RS Stock No. 794-8277
  • Mfr. Part No. G3NA-210B-UTU DC5-24
Subtotal (1 unit)
Kr. 523,18(exc. VAT)
In Stock
Eaton ESR5, 230V ac Safety Relay, 3 Safety Contacts
  • RS Stock No. 812-8951
  • Mfr. Part No. 119380 ESR5-NO-31-230VAC
Subtotal (1 unit)
Kr. 3 212,12(exc. VAT)
In Stock
Allen Bradley, 230V ac Safety Relay, 2 Safety Contacts
  • RS Stock No. 447-5537
  • Mfr. Part No. 440R-N23112
Subtotal (1 unit)
Kr. 2 350,81(exc. VAT)
Temporarily out of stock
Omron PCB Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 366-293
  • Mfr. Part No. G2R-1-E DC12
Subtotal (1 unit)
Kr. 61,09(exc. VAT)
In Stock
Hongfa Europe GMBH 4RM Series Interface Relay, DIN Rail, 12V dc Coil, 4PDT, 5A
  • RS Stock No. 137-2125
  • Mfr. Part No. 4RM-12-5
Subtotal (1 unit)
Kr. 119,95(exc. VAT)
In Stock
Phoenix Contact PLC-RSC-24DC/21 Series Interface Relay, DIN Rail, 24V dc Coil, SPDT, 9mA
  • RS Stock No. 358-8301
  • Mfr. Part No. 2966171
Subtotal (1 unit)
Kr. 172,16(exc. VAT)
Temporarily out of stock
RS PRO Solid State Relay, 30 A Load, DIN Rail Mount, 530 Vrms Load, 32V dc Control
  • RS Stock No. 121-3895
Subtotal (1 unit)
Kr. 955,78(exc. VAT)
Stocked by manufacturer
Phoenix Contact PSR-ESA, 24V ac/dc Safety Relay, 4 Safety Contacts, 1
  • RS Stock No. 666-7044
  • Mfr. Part No. 2963802
Subtotal (1 unit)
Kr. 2 605,06(exc. VAT)
In Stock
TE Connectivity PCB Power Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 909-7949
  • Mfr. Part No. 2-1393240-3
Subtotal (1 unit)
Kr. 80,13(exc. VAT)
Temporarily out of stock
Tele Monitoring Relay, 1 Phase, DPDT, DIN Rail to 20A, 24 V dc, 12V ac, 400 V ac
  • RS Stock No. 287-1896
  • Mfr. Part No. G2UM300VL20
Subtotal (1 unit)
Kr. 1 727,53(exc. VAT)
In Stock
Phoenix Contact PCB Power Relay, 24V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 507-9972
  • Mfr. Part No. 2961312
Subtotal (1 unit)
Kr. 50,15(exc. VAT)
In Stock
Hongfa Europe GMBH PCB Signal Relay, 5V Coil, 2A, DPDT
  • RS Stock No. 176-2909
  • Mfr. Part No. HFD2/005-S-L1-D
Subtotal (1 pack of 2 units)
Kr. 53,61(exc. VAT)
In Stock
TE Connectivity Automotive Relay, 24 V dc Coil Voltage, 40 A Switching Current, SPDT
  • RS Stock No. 359-6302
  • Mfr. Part No. V23134A1053C643 6-1393302-3
Subtotal (1 unit)
Kr. 174,04(exc. VAT)
In Stock
ABB Monitoring Relay, 3 Phase, 208/440 V ac Monitor Range, SPDT, DIN Rail, 440V ac
  • RS Stock No. 442-9411
  • Mfr. Part No. 1SVR550824R9100
Subtotal (1 unit)
Kr. 1 206,28(exc. VAT)
In Stock
Finder Monitoring Relay, 1 Phase, SPDT, DIN Rail, 24V ac 24 V dc
  • RS Stock No. 776-1575
  • Mfr. Part No. 72.01.8.024.0000
Subtotal (1 unit)
Kr. 844,50(exc. VAT)
In Stock
RS PRO DIN Rail Timer Relay, 3-Contact, 230 V dc 230V ac, 24 V ac, 0.1 to 100 h, 1-Function, SPDT Switch Configuration
  • RS Stock No. 119-803
Subtotal (1 unit)
Kr. 261,23(exc. VAT)
In Stock
Finder Monitoring Relay, 1 Phase, SPDT, DIN Rail, 24V ac 24 V dc
  • RS Stock No. 776-1581
  • Mfr. Part No. 72.01.8.240.0000
Subtotal (1 unit)
Kr. 844,50(exc. VAT)
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