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

825 of 859
Harmony Relay RXG 2 Pin 250V Clip-On Relay Socket, for use with RXG2 Relays
  • RS Stock No. 585-487
  • Mfr. Part No. RGZE08E
Each
SGD8.31(exc. GST)
Sensata Crydom HA Series Series Solid State Relay, 50 A Load, Panel Mount, 660 V ac Load, 280 V Control
  • RS Stock No. 291-2315
  • Mfr. Part No. HA6050
Each
SGD126.81(exc. GST)
Siemens Thermistor Motor Protection Monitoring Relay, DPDT, 24 → 240V ac/dc, DIN Rail
  • RS Stock No. 175-2290
  • Mfr. Part No. 3RN2012-2BW31
Each
SGD525.12(exc. GST)
Relpol 8 Pin 300V ac DIN Rail Relay Socket, for use with R2N Relay
  • RS Stock No. 123-2058
  • Mfr. Part No. GZT2-GREY
Each
SGD7.14(exc. GST)
Siemens DIN Rail Relay, 4PST
  • RS Stock No. 275-1974
  • Mfr. Part No. 7PG2144-1EA40-1CF0
Each
SGD6,317.05(exc. GST)
Siemens 3RF2 Series Solid State Relay, 20 A Load, Chassis Mount, 230 V ac Load, 30 Vdc Control
  • RS Stock No. 153-249
  • Mfr. Part No. 3RF2120-2AA42
Each
SGD72.53(exc. GST)
Panasonic SPDT Non-Latching Relay PCB Mount, 12V dc Coil, 6 A
  • RS Stock No. 715-3530
  • Mfr. Part No. APF30212
Each
SGD7.62(exc. GST)
Gefran GQ Series Solid State Relay, 50 A Load, Surface Mount, 480 V ac Load, 32 Control
  • RS Stock No. 601-832
  • Mfr. Part No. GQ-50-48-D-1-3
Each
SGD152.86(exc. GST)
TE Connectivity PCB Mount Power Relay, 5V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 189-5906
  • Mfr. Part No. 1393230-7
Each (In a Box of 20)
SGD18.137(exc. GST)
TE Connectivity PCB Mount Latching Signal Relay, 3V dc Coil, 2A Switching Current, DPDT
  • RS Stock No. 718-1941
  • Mfr. Part No. 5-1462037-3
Each
SGD5.46(exc. GST)
Panasonic Surface Mount Signal Relay, 24V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 699-5856
  • Mfr. Part No. AGN200A24
Each
SGD3.94(exc. GST)
Phoenix Contact PLC-RPT24UC/21-21/RW Series Interface Relay, DIN Rail Mount, 12V dc Coil, DPDT, 2-Pole
  • RS Stock No. 196-0406
  • Mfr. Part No. 2900346
Each (In a Pack of 10)
SGD82.695(exc. GST)
Finder Pluggable Function Module, LED Module
  • RS Stock No. 666-8037
  • Mfr. Part No. 99.01.0.060.59
Each
SGD6.18(exc. GST)
Siemens 3RF2 Series Solid State Relay, 20 A Load, Chassis Mount, 460 V ac Load, 30 Vdc Control
  • RS Stock No. 153-253
  • Mfr. Part No. 3RF2120-3AA04
Each
SGD78.92(exc. GST)
Omron PCB Mount Latching Power Relay, 5V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 254-3142
  • Mfr. Part No. G5RL-U1A-E DC5
Each
SGD5.83(exc. GST)
Panasonic PCB Mount Latching Power Relay, 9V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 134-7891
  • Mfr. Part No. ADW1109HLW
Each (In a Box of 100)
SGD5.504(exc. GST)
Sensata Crydom PM67 Series Solid State Relay, 50 A Load, Panel Mount, 600 V ac Load
  • RS Stock No. 227-0944
  • Mfr. Part No. PM6760A50RP
Each
SGD313.58(exc. GST)
Sensata Crydom 1 Series Solid State Relay, 25 A rms Load, Panel Mount, 140 V ac Load, 32 V dc Control
  • RS Stock No. 145-0571
  • Mfr. Part No. D1225K
Each
SGD85.24(exc. GST)
Relay module, 24 V AC,
  • RS Stock No. 577-710
  • Mfr. Part No. 2476780000
Each
SGD36.89(exc. GST)
Gefran GRS-H Series Solid State Relay, 30 A Load, DIN Rail Mount, 600 V ac Load, 32 V dc Control
  • RS Stock No. 600-935
  • Mfr. Part No. GRS-H-30-60-D-2-0-0-0
Each
SGD246.75(exc. GST)
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