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

820 of 859
TE Connectivity PCB Mount Power Relay, 48V ac Coil, 8A Switching Current, DPDT
  • RS Stock No. 680-3852
  • Mfr. Part No. RT424548
Each
SGD9.02(exc. GST)
Phoenix Contact MINI MCR Series Solenoid Driver, Digital Input, Voltage Output, 24V dc Supply
  • RS Stock No. 484-062
  • Mfr. Part No. 1175891
Each
SGD443.27(exc. GST)
Sensata Crydom GNR Series Solid State Relay, 45 A rms Load, DIN Rail Mount, 600 V rms Load, 32 V dc Control
  • RS Stock No. 145-0559
  • Mfr. Part No. GNR45DCZ
Each
SGD269.16(exc. GST)
Finder 19 Series Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT
  • RS Stock No. 711-4787
  • Mfr. Part No. 19.91.9.012.4000
Each
SGD45.02(exc. GST)
Gefran GRZ-H Series Solid State Relay, 40 A Load, DIN Rail Mount, 480 V ac Load, 260 V ac Control
  • RS Stock No. 601-178
  • Mfr. Part No. GRZ-H-3P-3S-40-48-A-0-FAN64-0
Each
SGD749.89(exc. GST)
Omron Surface Mount Signal Relay, 5V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 205-1962
  • Mfr. Part No. G6J-2FL-Y-TR DC5
Each (On a Tape of 800)
SGD3.781(exc. GST)
Panasonic PhotoMOS Series Solid State Relay, 1.2 A Load, Surface Mount, 60 V Load
  • RS Stock No. 205-6913
  • Mfr. Part No. AQY222R2V
Each (In a Tube of 150)
SGD9.226(exc. GST)
TE Connectivity Surface Mount Non-Latching Relay, 24V dc Coil, 200A Switching Current, SPST
  • RS Stock No. 223-8122
  • Mfr. Part No. 29-211-12A
Each
SGD557.62(exc. GST)
Omron Plug In Latching Power Relay, 48V ac Coil, 6A Switching Current, 4PDT
  • RS Stock No. 271-1944
  • Mfr. Part No. MY4IN-GS-R AC48
Each
SGD18.40(exc. GST)
Gefran GRP-H Series Solid State Relay, 50 A Load, DIN Rail Mount, 480 V ac Load, 530 V ac Control
  • RS Stock No. 601-214
  • Mfr. Part No. GRP-H-50-48-I-1-0-0-2-0-0
Each
SGD761.92(exc. GST)
Carlo Gavazzi Plug In Timer Relay, 12 → 240V ac/dc, 4-Contact, 0.05 s → 300h, DPDT
  • RS Stock No. 859-3119
  • Mfr. Part No. FAA08DW24
Each
SGD163.82(exc. GST)
Gefran GRS-H Series Solid State Relay, 120 A Load, DIN Rail, Panel Mount, 600 V ac Load, 32 V dc Control
  • RS Stock No. 601-600
  • Mfr. Part No. GRS-H-120-60-D-1-FAN60-0-0
Each
SGD645.17(exc. GST)
Carlo Gavazzi RM1D Series Solid State Relay, 10 A Load, Chassis Mount, 500 V dc Load
  • RS Stock No. 209-8617
  • Mfr. Part No. RM1D500D10
Each
SGD138.99(exc. GST)
Tele Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS Stock No. 123-9723
  • Mfr. Part No. V2IM10AL10
Each
SGD214.09(exc. GST)
i-Autoc KSI Series Solid State Relay, 60 A Load, Panel Mount, 280 V ac Load, 32 V dc Control
  • RS Stock No. 903-2927
  • Mfr. Part No. KSI240D60-L(068)
Each
SGD62.55(exc. GST)
Finder Plug In Power Relay, 48V ac Coil, 25A Switching Current, SPDT
  • RS Stock No. 508-5567
  • Mfr. Part No. 46.61.8.048.0040
Each
SGD17.51(exc. GST)
Schneider Electric Current Monitoring Relay, 1 Phase, SPDT
  • RS Stock No. 211-1878
  • Mfr. Part No. RM1XA016
Each
SGD546.03(exc. GST)
TE Connectivity 2071566 Series Retaining Relay Clip for Use with PCB Socket
  • RS Stock No. 272-7716
  • Mfr. Part No. 2071566-8
Each (In a Bag of 10)
SGD0.628(exc. GST)
Hongfa Europe GMBH RMTFL Series Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT, 1-Pole, 16A Load
  • RS Stock No. 137-2115
  • Mfr. Part No. 1RMTFL-12-3
Each
SGD23.06(exc. GST)
Omron G2RV-ST Series Electromechanical Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT, 1-Pole, 50mA Load
  • RS Stock No. 271-1843
  • Mfr. Part No. G2RV-ST500-AP 12VDC
Each
SGD33.15(exc. GST)
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