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

34 of 887
In Stock
Hongfa Europe GMBH 5 Pin 250V ac DIN Rail Relay Socket, for use with HF41F Series Relays
  • RS stock no. 923-2625
  • Mfr. Part No. 41F-1Z-C1-4
Each
R 152.99(exc. VAT)
In Stock
ABB Phase Monitoring Relay, 3 Phase, DPDT, 300 → 500V ac, DIN Rail
  • RS stock no. 775-7885
  • Mfr. Part No. 1SVR730774R3300 CM-PAS.41S
Each
R 4,763.30(exc. VAT)
In Stock
Finder Plug In Relay, 230V ac Coil, 10A Switching Current, 3PDT
  • RS stock no. 292-8310
  • Mfr. Part No. 55.33.8.230.0010
Each
R 339.81(exc. VAT)
In Stock
Crouzet Syr-Line Series Panel Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.001 → 9.999 s, 0.01
  • RS stock no. 166-3812
  • Mfr. Part No. MDF1R10MV2
Each
R 5,241.98(exc. VAT)
Temporarily out of stock
Phoenix Contact MACX MCR Series Solenoid Driver, Digital Input, Digital Output
  • RS stock no. 493-355
  • Mfr. Part No. 1291176
Each
R 6,358.33(exc. VAT)
In Stock
ABB Current Monitoring Relay, 1 Phase, DPDT, DIN Rail
  • RS stock no. 775-8018
  • Mfr. Part No. 1SVR730841R1500 CM-SRS.22S
Each
R 4,136.15(exc. VAT)
In Stock
Crouzet Syr-Line Series Panel Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.001 → 9.999 s, 0.01
  • RS stock no. 166-3814
  • Mfr. Part No. GDS2R10MV2
Each
R 5,540.99(exc. VAT)
In Stock
Crouzet Syr-Line Series Panel Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.001 → 9.999 s, 0.01
  • RS stock no. 166-3811
  • Mfr. Part No. MDA2R10MV2
Each
R 5,498.29(exc. VAT)
In Stock
Sensata Crydom DRC Series Series Solid State Relay, 7.6 A Load, DIN Rail Mount
  • RS stock no. 822-9350
  • Mfr. Part No. DRC3P48D400R2
Each
R 1,914.85(exc. VAT)
Temporarily out of stock
Weidmüller ACT20M Series Temperature Converter, Temperature Input, Current Output, 24V dc Supply, ATEX, FM, IECEx
  • RS stock no. 287-5477
  • Mfr. Part No. 1375510000
Each
R 2,972.34(exc. VAT)
In Stock
Finder 38.51 Series Electromechanical Interface Relay, DIN Rail Mount, 24V Coil, SPDT, 1-Pole, 6A Load
  • RS stock no. 653-006
  • Mfr. Part No. 38.51.7.024.5050
Each
R 548.55(exc. VAT)
In Stock
Omron Plug In Power Relay, 110V ac Coil, 10A Switching Current, SPDT
  • RS stock no. 353-859
  • Mfr. Part No. G2R-1-SN 110VAC (S)
Each
R 210.63(exc. VAT)
In Stock
TE Connectivity 8 Pin 240V ac DIN Rail Relay Socket, for use with RT Series
  • RS stock no. 420-372
  • Mfr. Part No. RT78725 1860306-1
Each
R 212.51(exc. VAT)
Temporarily out of stock
ABB Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail
  • RS stock no. 775-7882
  • Mfr. Part No. 1SVR730774R1300 CM-PAS.31S
Each
R 4,765.70(exc. VAT)
Being discontinued
Siemens SIRIUS 3RQ3 Series Solid State Relay, 5 A Load, DIN Rail Mount, 30 V Control
  • RS stock no. 275-4074
  • Mfr. Part No. 3RQ3055-2SM30
Each (In a Pack of 5)
R 1,453.088(exc. VAT)
In Stock
Hongfa Europe GMBH Flange Mount Power Relay, 12V dc Coil, 30A Switching Current, DPDT
  • RS stock no. 121-8066
  • Mfr. Part No. HF92F-012D-2C21S
Each
R 398.02(exc. VAT)
Being discontinued
Siemens SIRIUS 3RQ3 Output Coupler with Plug-In Series Relay, Snap-On Rail Mount, 24V dc Coil
  • RS stock no. 175-2339
  • Mfr. Part No. 3RQ3118-1AM00
Each
R 475.64(exc. VAT)
In Stock
RS PRO Plug In Power Relay, 24V ac Coil, 10A Switching Current, 3PDT
  • RS stock no. 121-7836
Each
R 317.56(exc. VAT)
In Stock
i-Autoc KSV Series Solid State Relay, DIN Rail or Panel Mount, 230V ac Coil
  • RS stock no. 135-3336
  • Mfr. Part No. KSV240A30-LM   
Each
R 1,499.68(exc. VAT)
In Stock
Releco PCB Mount Power Relay, 12V dc Coil, 5A Switching Current, DPDT
  • RS stock no. 613-8016
  • Mfr. Part No. C12A21X12D
Each
R 366.51(exc. VAT)
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