Relays & Signal Conditioning

We stock a large choice of relay 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 from trusted brands 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 is operated electronically to turn on or off current within an electric circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, the main difference is that 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 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 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's feature semiconductor switching elements, typically thyristors, triacs and diodes that transmits and energises 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.
Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17728 Products showing for Relays & Signal Conditioning

7 of 887
Omron Panel Mount Power Relay, 240V ac Coil, 30A Switching Current, SPST
  • RS stock no. 329-941
  • Mfr. Part No. G7L-1A-T AC200/240
Each
R 342.32(exc. VAT)
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 6 A Load, DIN Rail Mount, 100 V dc Load, 32 V dc Control
  • RS stock no. 922-1981
  • Mfr. Part No. SSM1D36BD
Each
R 949.65(exc. VAT)
GEORGIN GS 75000 Series Isolation Amplifier, Current, Voltage Input, Analogue Output
  • RS stock no. 230-9470
  • Mfr. Part No. GS75000S
1 Box of 1
R 4,472.84(exc. VAT)
Omron Panel Mount Power Relay, 240V ac Coil, 30A Switching Current, SPST
  • RS stock no. 684-0160
  • Mfr. Part No. G7L-1A-TUB 200/240AC
Each
R 497.87(exc. VAT)
Finder 90 250V DIN Rail Relay Socket, for use with 60.13 Relays
  • RS stock no. 494-870
  • Mfr. Part No. 90.21SMA
Each
R 100.14(exc. VAT)
Tempatron DIN Rail, Panel Mount Timer Relay, 230V ac, 2-Contact, 0.5 → 20s, 1-Function, DPDT
  • RS stock no. 347-769
  • Mfr. Part No. FBDE20SLP230VAC
Each
R 1,663.52(exc. VAT)
RS PRO Relay, Current, Voltage Input, 5V Supply
  • RS stock no. 325-339
Each
R 12.17(exc. VAT)
Panasonic Plug In Automotive Relay, 12V dc Coil, 40A Switching Current, SPDT
  • RS stock no. 178-2012
  • Mfr. Part No. CB112
Each
R 190.86(exc. VAT)
Better World
Schneider Electric Harmony Relay RXM Series Interface Relay, DIN Rail Mount, 230V ac Coil, 4PDT, 4-Pole, 6A Load
  • RS stock no. 203-5228
  • Mfr. Part No. RXM4AB2P7PVM
Each
R 656.48(exc. VAT)
Pilz PNOZsigma PNOZ s4 C Safety Relay 24V dc, Dual-Channel
  • RS stock no. 268-7567
  • Mfr. Part No. 751104
Each
R 5,293.75(exc. VAT)
Releco MRC 11 Pin 250V ac DIN Rail Relay Socket, for use with MRC Series 11-Pin Relay
  • RS stock no. 403-229
  • Mfr. Part No. S3-B
Each
R 271.53(exc. VAT)
Motrona IP Series Signal Converter, Current, Voltage Input, Current, Voltage Output, 10 → 30V dc Supply
  • RS stock no. 309-396
  • Mfr. Part No. IP210
Each
R 8,186.60(exc. VAT)
RS PRO Plug In Power Relay, 12V dc Coil, 10A Switching Current, DPDT
  • RS stock no. 450-0374
Each
R 187.74(exc. VAT)
Omron Plug In Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS stock no. 536-966
  • Mfr. Part No. MKS2PIN 24VDC
Each
R 298.26(exc. VAT)
GIC Voltage Monitoring Relay, 1, 3 Phase, DPDT, DIN Rail
  • RS stock no. 794-3948
  • Mfr. Part No. MG73BH
Each
R 1,201.13(exc. VAT)
RS PRO Panel Mount Timer Relay, 24V ac/dc, 1-Contact, 1-Function, SPDT
  • RS stock no. 808-6623
Each
R 2,121.05(exc. VAT)
Siemens SIRIUS 3RQ3 Output Coupler with Plug-In Series Relay, 24V ac/dc Coil
  • RS stock no. 175-2333
  • Mfr. Part No. 3RQ3118-1AB00
Each
R 540.66(exc. VAT)
Finder Flange Mount Relay, 240V ac Coil, 12A Switching Current
  • RS stock no. 248-1720
  • Mfr. Part No. 563282400040
Each (In a Pack of 10)
R 408.20(exc. VAT)
Guardmaster DI Configurable Safety Relay, Dual Channel, 24 V dc, 2 Safety, 1 Auxiliary
  • RS stock no. 751-1024
  • Mfr. Part No. 440R-D22R2
Each
R 9,528.68(exc. VAT)
Better World
Schneider Electric Harmony Relay RSL Series Relay Socket, Plug In, 24V dc Coil, SPDT
  • RS stock no. 179-7331
  • Mfr. Part No. RSLZVA1
Each
R 367.26(exc. VAT)
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