Relays & Signal Conditioning

At RS, we stock a large choice of relay switch products for a wide variety of applications. Within our range, you will find products such as latching and non-latching relays, solid state relays, interface relays and reed relays. All our relay switch products are from trusted electrical relay suppliers such as our own RS PRO brand, Omron, Finder, TE Connectivity, Panasonic, Phoenix Contact and more.

What is a relay?

Relays are a type of switch that operate electronically to turn AC or DC currents on or off within an electrical circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, but the main difference lies in how a relay is operated by an electrical circuit rather than manually pressed.

Relays have many different uses and are often utilised in situations where isolation is necessary or when a circuit needs to be controlled with a low-power signal. There are also specialised types of relay switches that are used for very high-power applications; these are referred to as contactors.

Types of relay

Electromechanical Relay (EMR): An electromechanical relay uses a physical moving arm, triggered by a voltage applied to the relay coil, this arm connects contacts within the output component of the relay. The movement of the arm allows an electrical circuit to be completed, allowing AC or DC current to flow to the connected equipment. The physical components within the relays commonly make a "click" sound, which can be used as an audible operation indicator.

Solid State Relay (SSR): Solid state relays provide a similar function to an EMR but these do not contain any moving components, increasing long-term reliability. SSR' feature semiconductor switching elements; typically thyristors, triacs and diodes that transmit and energise the output signal. When activated, the input signal acts like a switch that allows a high-voltage signal to pass through the SSRs output components.

Shop relays, relay accessories, and signal conditioners isolators at RS today.

Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17174 Products showing for Relays & Signal Conditioning

800 of 859
In Stock
Gefran GQ Series Solid State Relay, 25 A Load, Surface Mount, 240 V ac Load, 32 Control
  • RS Stock No. 601-829
  • Mfr. Part No. GQ-25-24-D-1-3
Each
SGD99.91(exc. GST)
Limited stock
Crouzet GNR Series Solid State Relay, 30 A Load, DIN Rail Mount, 660 V ac Load, 280 V ac Control
  • RS Stock No. 284-6765
  • Mfr. Part No. GNR30ACZH
Each
SGD132.02(exc. GST)
In Stock
Siemens 3RF2 Series Solid State Relay, 30 A Load, DIN Rail Mount, 460 V ac Load, 24 V dc Control
  • RS Stock No. 518-7708
  • Mfr. Part No. 3RF2330-1BA04
Each
SGD216.27(exc. GST)
Temporarily out of stock
Omron G3VM Series Solid State Relay, 2 A Load, PCB Mount, 100 V Load
  • RS Stock No. 225-1596
  • Mfr. Part No. G3VM-101AR1
Each (In a Tube of 400)
SGD14.648(exc. GST)
In Stock
IXYS Solid State Relay, 150 mA Load, Surface Mount
  • RS Stock No. 906-1010
  • Mfr. Part No. CPC1008N
Each (In a Bag of 5)
SGD1.702(exc. GST)
Temporarily out of stock
Omron G3NA-250B-UTU 100-240VAC Series Solid State Relay, 50 A Load, Surface Mount, 240 V ac Load
  • RS Stock No. 266-2742
  • Mfr. Part No. G3NA-250B-UTU AC100-240
Each
SGD153.13(exc. GST)
Temporarily out of stock
Gefran GRZ-H Series Solid State Relay, 30 A Load, DIN Rail Mount, 600 V ac Load, 260 V ac Control
  • RS Stock No. 602-021
  • Mfr. Part No. GRZ-3P-2S-30I-60-A-0-0-0
Each
SGD516.37(exc. GST)
Temporarily out of stock
Gefran GRS-H Series Solid State Relay, 90 A Load, DIN Rail, Panel Mount, 600 V ac Load, 32 V dc Control
  • RS Stock No. 601-072
  • Mfr. Part No. GRS-H-90-60-D-3-FAN62-0-0
Each
SGD459.80(exc. GST)
In Stock
Hongfa Europe GMBH PCB Mount Latching Power Relay, 5V dc Coil, 15A Switching Current, SPST
  • RS Stock No. 176-2655
  • Mfr. Part No. HF3F-L/5-1HL1T
Each (In a Box of 100)
SGD2.849(exc. GST)
In Stock
TE Connectivity PCB Mount Signal Relay, 24V dc Coil, 2A Switching Current, DPDT
  • RS Stock No. 135-4506
  • Mfr. Part No. IM07TS
Each (In a Tube of 1000)
SGD3.663(exc. GST)
Temporarily out of stock
Siemens 3RQ4 Series Relay, Plug In, 115V ac/dc Coil, SPDT, 1-Pole, 6A Load
  • RS Stock No. 629-399
  • Mfr. Part No. 3RQ4018-1AE00
1 Pack of 10
SGD417.50(exc. GST)
In Stock
Omron PCB Mount Power Relay, 12V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 369-753
  • Mfr. Part No. G6B-1174P-US DC12
Each
SGD9.42(exc. GST)
In Stock
Infineon PVA33NPbF Series Solid State Relay, 150 mA Load, PCB Mount, 300 V ac/dc Load
  • RS Stock No. 244-0914
  • Mfr. Part No. PVA3354NPBF
Each
SGD13.50(exc. GST)
In Stock
Omron PCB Mount Signal Relay, 12V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 233-4186
  • Mfr. Part No. G6K-2P-Y DC12
Each
SGD6.47(exc. GST)
In Stock
TE Connectivity PCB Mount RF Relay, 2.4V dc Coil, DPDT
  • RS Stock No. 181-185
  • Mfr. Part No. 3-1462040-6
1 Tape of 2
SGD6.05(exc. GST)
Temporarily out of stock
Phoenix Contact PLC-OPT-110DC Series Solid State Interface Relay, DIN Rail Mount
  • RS Stock No. 196-0416
  • Mfr. Part No. 2900380
Each (In a Pack of 10)
SGD84.11(exc. GST)
In Stock
Siemens 3RF2 Series Solid State Relay, 20 A Load, DIN Rail Mount, 460 V Load, 24 V dc Control
  • RS Stock No. 467-4807
  • Mfr. Part No. 3RF2320-1AA04
Each
SGD153.88(exc. GST)
In Stock
Tele Interface Relay, DIN Rail Mount, 1-Pole
  • RS Stock No. 730-0509
  • Mfr. Part No. E1K 24-240VACDC
Each
SGD57.79(exc. GST)
Temporarily out of stock
Phoenix Contact PSI Series Fibre Optic Converter, 24V dc Supply, ATEX
  • RS Stock No. 129-682
  • Mfr. Part No. 2708290
Each
SGD1,289.02(exc. GST)
In Stock
Panasonic Surface Mount Signal Relay, 4.5V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 173-8904
  • Mfr. Part No. AGN200S4H
Each (In a Tube of 50)
SGD3.484(exc. GST)
1
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