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

17717 Products showing for Relays & Signal Conditioning

47 of 886
Motrona UZ Series Signal Converter, Current, Voltage Input, Frequency Output, 12 → 30V dc Supply
  • RS stock no. 309-397
  • Mfr. Part No. UZ210
Each
R 9,906.45(exc. VAT)
Phoenix Contact PCB Mount Power Relay, 230V ac Coil, 12A Switching Current, DPDT
  • RS stock no. 794-3803
  • Mfr. Part No. 2903668
Each
R 184.50(exc. VAT)
Finder PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPST-NO
  • RS stock no. 494-6348
  • Mfr. Part No. 45.71.7.012.0310
Each
R 157.78(exc. VAT)
Omron G3PH-5150B 5-24VDC Series Solid State Relay, 150 A Load, Surface Mount, 480 V ac Load
  • RS stock no. 266-2769
  • Mfr. Part No. G3PH-5150B DC5-24
Each
R 22,386.68(exc. VAT)
Dold IK7817N Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.03 → 300 min, 0.06 →
  • RS stock no. 465-0609
  • Mfr. Part No. IK7817N.81/200 AC/DC12-240V 0.02s-300h
Each
R 3,324.72(exc. VAT)
ABB Optocoupler, Max. Forward 12 V, Max. Input 9 mA, 75mm Length, DIN Rail Mounting Style
  • RS stock no. 773-0109
  • Mfr. Part No. 1SNA645550R1100 OBROC2000-5-12VDC
Each
R 787.90(exc. VAT)
Phoenix Contact Current Monitoring Relay, Single Phase, DIN Rail
  • RS stock no. 120-150
  • Mfr. Part No. 2903521
Each
R 2,673.86(exc. VAT)
Sensata Crydom SSC Series Solid State Relay, 25 A Load, Surface Mount, 1000 V Load, 16 V Control
  • RS stock no. 535-3034
  • Mfr. Part No. SSC1000-25-12
Each
R 5,368.73(exc. VAT)
ABB Voltage Monitoring Relay, 1 Phase, DPDT, 3→30 V, 6→60 V, 30→300 V, 60→600 V, DIN Rail
  • RS stock no. 775-7955
  • Mfr. Part No. 1SVR730830R0400 CM-ESS.2S
Each
R 4,897.68(exc. VAT)
ABB CR-M PCB Mount Relay Socket
  • RS stock no. 775-5160
  • Mfr. Part No. 1SVR405651R2000 CR-M3SS
Each
R 118.22(exc. VAT)
Schneider Electric Pluggable Function Module, LED Diode for use with RSZ Series Socket
  • RS stock no. 852-6907
  • Mfr. Part No. RZM031FPD
Each
R 194.82(exc. VAT)
Crydom 25 A rms Solid State Relay, Zero Cross, PCB Mount SCR, 530 V rms Maximum Load
  • RS stock no. 291-2501
  • Mfr. Part No. PFE380D25
Each
R 779.97(exc. VAT)
Finder Plug In Power Relay, 110V dc Coil, 12A Switching Current, 4PDT
  • RS stock no. 800-2821
  • Mfr. Part No. 56.34.9.110.0000T
Each
R 919.22(exc. VAT)
Panasonic AQY Series Solid State Relay, 130 mA Load, Surface Mount, 350 V ac/dc Load
  • RS stock no. 247-4235
  • Mfr. Part No. AQY210EHAX
Each (On a Tape of 2)
R 39.53(exc. VAT)
Finder Plug In Power Relay, 110V dc Coil, 12A Switching Current, DPDT
  • RS stock no. 800-2824
  • Mfr. Part No. 56.32.9.110.0000T
Each
R 608.97(exc. VAT)
Finder Plug In Relay, 12V dc Coil, 7A Switching Current, 4PDT
  • RS stock no. 248-1645
  • Mfr. Part No. 553490120094
Each (In a Pack of 10)
R 302.65(exc. VAT)
TE Connectivity Plug In Latching Power Relay, 48V dc Coil, 10A Switching Current, DPDT
  • RS stock no. 782-6884
  • Mfr. Part No. KUL-11D15D-48
Each
R 1,849.00(exc. VAT)
Phoenix Contact PCB Mount Power Relay, 230V ac Coil, 6A Switching Current
  • RS stock no. 212-7312
  • Mfr. Part No. 2903685
Each (In a Pack of 10)
R 221.903(exc. VAT)
Panasonic Surface Mount Signal Relay, 3V dc Coil, 1A Switching Current, SPDT
  • RS stock no. 699-6247
  • Mfr. Part No. TQ2SA-3V
Each
R 61.71(exc. VAT)
Carlo Gavazzi Current, Voltage Monitoring Relay, SPDT, 0.4 → 500 V ac, 2 → 500V dc, DIN Rail
  • RS stock no. 727-1256
  • Mfr. Part No. PUA01CB23500V
Each
R 2,426.58(exc. VAT)
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