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

44 of 886
In Stock
Sensata Crydom GNR Series Series Solid State Relay, 10 A rms Load, DIN Rail Mount, 32 V dc Load, 32 V dc Control
  • RS stock no. 170-7343
  • Mfr. Part No. GNR10DCZ
Each
R 2,454.60(exc. VAT)
In Stock
Finder 93 Series 8 Pin 250V Relay Socket, for use with 38 series
  • RS stock no. 225-4629
  • Mfr. Part No. 093.08.0
Each
R 82.24(exc. VAT)
Last RS stock
TE Connectivity Plug In Automotive Relay, 12V dc Coil, 15/10A Switching Current, SPDT
  • RS stock no. 277-7217
  • Mfr. Part No. 3-1904022-2
Each
R 176.06(exc. VAT)
In Stock
Sensata Crydom DRA1 CMX Series Solid State Interface Relay, 28 V dc Control, 8 A Load, DIN Rail Mount
  • RS stock no. 701-8493
  • Mfr. Part No. DRA1-CMXE60D10
Each
R 1,856.08(exc. VAT)
In Stock
Omron H3CR Series DIN Rail Mount Timer Relay, 12 → 48 V dc, 24 → 48V ac, 11-Contact, 0.05 s → 30h,
  • RS stock no. 177-0097
  • Mfr. Part No. H3CR-FN AC24-48/DC12-48
Each
R 2,721.58(exc. VAT)
Currently unavailable
Phoenix Contact EMG REL Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole
  • RS stock no. 308-1311
  • Mfr. Part No. 2942153
Each
R 839.30(exc. VAT)
In Stock
Sensata Crydom GNR Series Solid State Relay, 20 A rms Load, DIN Rail Mount, 600 V rms Load, 32 V dc Control
  • RS stock no. 145-0552
  • Mfr. Part No. GNR20DHZ
Each
R 2,668.60(exc. VAT)
In Stock
Sensata Crydom DR22 Series Solid State Relay, 30 A Load, DIN Rail Mount, 200 V dc Load, 32 V dc Control
  • RS stock no. 910-7298
  • Mfr. Part No. DR2220D30U
Each
R 2,764.16(exc. VAT)
In Stock
Sensata Crydom CX Series Series Solid State Relay, 5 A Load, PCB Mount, 660 V ac Load, 15 V Control
  • RS stock no. 291-2393
  • Mfr. Part No. CX480D5
Each
R 510.01(exc. VAT)
Limited stock
Omron G7SA 14 Pin 24V dc DIN Rail Relay Socket, for use with G7SA Series Relay
  • RS stock no. 125-0868
  • Mfr. Part No. P7SA-14F-ND-PU DC24
Each
R 656.79(exc. VAT)
In Stock
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 10A Switching Current, SPST
  • RS stock no. 124-4469
  • Mfr. Part No. OJ-SS-124HM,000
Each (In a Pack of 5)
R 34.802(exc. VAT)
In Stock
Siemens LZS Series Coupling Relay, 115V ac Coil
  • RS stock no. 217-6843
  • Mfr. Part No. LZS:PT5A5S15
Each (In a Pack of 5)
R 418.524(exc. VAT)
In Stock
Omron PCB Mount Power Relay, 110V ac Coil, 10A Switching Current, 3PDT
  • RS stock no. 536-928
  • Mfr. Part No. MKS3PIN-5 110VAC
Each
R 332.82(exc. VAT)
In Stock
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, SPST
  • RS stock no. 256-2689
  • Mfr. Part No. V23061A1007A302
Each
R 83.90(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
Sensata Crydom 1-DC Series Solid State Relay, 40 A dc Load, Panel Mount, 100 V dc Load, 32 V dc Control
  • RS stock no. 145-0573
  • Mfr. Part No. D1D40K
Each
R 2,207.00(exc. VAT)
Limited stock
Panasonic AQZ Series Solid State Relay, 2.7 A Load, PCB Mount, 60 V ac/dc Load
  • RS stock no. 247-4294
  • Mfr. Part No. AQZ202D
Each
R 232.52(exc. VAT)
Temporarily out of stock
Omron G3VM Series Solid State Relay, 1 A Load, Surface Mount, 40 V Load, 1.5 V Control
  • RS stock no. 683-9012P
  • Mfr. Part No. G3VM-41GR8
Each (Supplied in a Tube)
R 150.76(exc. VAT)
In Stock
Omron G3NA-275B-UTU-2 100-240VAC Series Solid State Relay, 75 A Load, Surface Mount, 240 V ac Load
  • RS stock no. 266-2743
  • Mfr. Part No. G3NA-275B-UTU-2 AC100-240
Each
R 2,314.96(exc. VAT)
In Stock
Omron PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS stock no. 683-8719P
  • Mfr. Part No. G2R-1A-E DC12
Each (Supplied in a Tray)
R 66.38(exc. VAT)
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