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

31 of 887
In Stock
Relpol PCB Mount Power Relay, 220V ac Coil, 40A Switching Current
  • RS stock no. 134-8384
  • Mfr. Part No. R40N-3011-85-5220
Each
R 240.68(exc. VAT)
In Stock
Panasonic Surface Mount Latching Signal Relay, 5V dc Coil, 2A Switching Current, DPDT
  • RS stock no. 173-8980
  • Mfr. Part No. TQ2SA-L2-5V
Each (In a Tube of 50)
R 68.769(exc. VAT)
Temporarily out of stock
Tele Temperature Monitoring Relay, SPDT, DIN Rail
  • RS stock no. 730-0495
  • Mfr. Part No. E3TF01 230V AC
Each
R 1,857.93(exc. VAT)
In Stock
GIC Phase, Voltage Monitoring Relay, 3 Phase, DPDT
  • RS stock no. 884-2473
  • Mfr. Part No. MAC04D0100
Each
R 1,256.82(exc. VAT)
In Stock
Panasonic DPDT Non-Latching Relay PCB Mount, 12V dc Coil, 2 A
  • RS stock no. 217-2911
  • Mfr. Part No. TQ2SA-12V
Each
R 89.39(exc. VAT)
In Stock
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)
In Stock
Finder PCB Mount Power Relay, 24V ac Coil, 8A Switching Current, DPDT
  • RS stock no. 534-5342
  • Mfr. Part No. 46.52.8.024.0054
Each
R 299.74(exc. VAT)
Temporarily out of stock
Finder PCB Mount Power Relay Module, 9V dc Coil, 8A Switching Current
  • RS stock no. 248-1913
  • Mfr. Part No. 405290090000
Each (In a Pack of 50)
R 194.706(exc. VAT)
In Stock
RS PRO Plug In Power Relay, 230V ac Coil, 10A Switching Current, DPDT
  • RS stock no. 450-0324
Each
R 141.19(exc. VAT)
Temporarily out of stock
Dold Frequency Monitoring Relay, DPDT, 15 → 280V ac, DIN Rail
  • RS stock no. 181-2791
  • Mfr. Part No. MK9837N.12/050 5-600Hz UH=DC24V
Each
R 5,621.42(exc. VAT)
Currently unavailable
Panasonic LT4H-W Series Panel Mount Timer Relay, 24V ac, 0 → 9999 h, 0 → 9999 min, 0 → 9999s
  • RS stock no. 228-734
  • Mfr. Part No. LT4HW24ACSJ
Each
R 3,846.22(exc. VAT)
In Stock
Finder 95 8 Pin 250V ac DIN Rail Relay Socket, for use with 40.52, 40.61, 44.52, 44.62, 40.51 Series Relay
  • RS stock no. 776-1642
  • Mfr. Part No. 95.85.3SMA
Each
R 179.24(exc. VAT)
In Stock
Interval Single Time Delay Relay, Screw, 0.1 s → 100 h, Solid State NO/NC, 1 Contacts, SPDT
  • RS stock no. 774-0336
  • Mfr. Part No. 88827044
Each
R 1,917.41(exc. VAT)
In Stock
SICK ReLy RLY3 Safety Relay 24V dc 2 Safety Contacts
  • RS stock no. 180-6090
  • Mfr. Part No. RLY3-OSSD200
Each
R 5,431.54(exc. VAT)
In Stock
Durakool Plug In Power Relay, 24V dc Coil, 60A Switching Current, SPDT
  • RS stock no. 915-6685
  • Mfr. Part No. DG85F-7011-36-1024
Each
R 101.44(exc. VAT)
In Stock
Finder 58 Series Interface Relay, DIN Rail Mount, 230V Coil, 3PDT, 3-Pole, 10A Load
  • RS stock no. 494-888
  • Mfr. Part No. 58.33.8.230.0060SMA
Each
R 678.44(exc. VAT)
In Stock
Eaton 2 Channel Zener Barrier, Switch/Proximity Detector Interface, RTD, Thermocouple Input, ATEX
  • RS stock no. 612-5341
  • Mfr. Part No. MTL7760AC/RS
Each
R 3,670.97(exc. VAT)
Last RS stock
Siemens Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS stock no. 758-6930
  • Mfr. Part No. 3UG4622-2AW30
Each
R 4,070.31(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Harmony XPS/ Preventa XPS XPSU 8 Auxiliary Contacts Safety Relay 24V ac/dc, Single Channel 5 Safety
  • RS stock no. 201-1473
  • Mfr. Part No. XPSUDN13AC
Each
R 7,665.05(exc. VAT)
In Stock
Omron PCB Mount Signal Relay, 12V dc Coil, 1A Switching Current, DPDT
  • RS stock no. 684-0356
  • Mfr. Part No. G5V-2-H 12DC
Each
R 88.45(exc. VAT)
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