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

17074 Products showing for Relays & Signal Conditioning

6 / 854
In Stock
Omron Monitoring Relay, 3 Phase, SPDT, DIN Rail
  • RS Stock No. 266-0104
  • Mfr. Part No. K8AK-PM2
Subtotal (1 unit)
MYR664.17
MYR664.17/unit
In Stock
Relpol Power Relay, 24V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 805-2204
  • Mfr. Part No. R15-2012-23-5024-WTL
Subtotal (1 unit)
MYR121.08
MYR121.08/unit
In Stock
Finder 80 Series DIN Rail Timer Relay, 1-Contact, 12 to 240 V ac/dc 12V ac, 240 V ac, 0.1 to 20 min, 0.1 to 24 h, 0.1 to
  • RS Stock No. 446-0327
  • Mfr. Part No. 80.01.0.240.0000
Subtotal (1 unit)
MYR312.61
MYR312.61/unit
In Stock
Finder 38 Series Interface Relay, DIN Rail, 12V dc Coil, SPDT, 15.2mA
  • RS Stock No. 386-4403
  • Mfr. Part No. 38.51.7.012.0050
Subtotal (1 unit)
MYR80.03
MYR80.03/unit
In Stock
Dold Monitoring Relay, 3 Phase, 0.7 to 1.3 UN Monitor Range, DPDT, DIN Rail 80 to 230 V dc
  • RS Stock No. 240-8967
  • Mfr. Part No. BD9080.12 3AC400V UH=AC230V
Subtotal (1 unit)
MYR3,252.33
MYR3,252.33/unit
In Stock
RS PRO ETM2432 Series Panel Timer Relay, 2-Contact, 24 V dc 230V ac, 0 to 01 min to 99 to 59 h, Multifunction-Function
  • RS Stock No. 124-1077
Subtotal (1 unit)
MYR498.60
MYR498.60/unit
In Stock
Eaton Zener Barrier, ATEX
  • RS Stock No. 783-4043
  • Mfr. Part No. MTL5582/RS
Subtotal (1 unit)
MYR2,840.43
MYR2,840.43/unit
In Stock
Pepperl + Fuchs 2 Channel Zener Barrier, ATEX
  • RS Stock No. 793-4297
  • Mfr. Part No. Z779
Subtotal (1 unit)
MYR548.66
MYR548.66/unit
Temporarily out of stock
Omron Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 271-1947
  • Mfr. Part No. MY4IN-GS-R DC24
Subtotal (1 unit)
MYR61.43
MYR61.43/unit
In Stock
Relpol Power Relay, 230V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 805-2217
  • Mfr. Part No. R15-2012-23-5230-WTL
Subtotal (1 unit)
MYR94.35
MYR94.35/unit
In Stock
Phoenix Contact PCB Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 290-1416
  • Mfr. Part No. 2961105
Subtotal (1 unit)
MYR83.07
MYR83.07/unit
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Timer Relay, 1-Contact, 24 to 240 V dc 24V ac, 240 V ac, 1-Function,
  • RS Stock No. 896-8673
  • Mfr. Part No. RE22R1AMR
Subtotal (1 unit)
MYR363.90
MYR363.90/unit
In Stock
Omron P2R 5 Way 250V ac PCB Relay Socket, for use with 1 Pole G2R Series
  • RS Stock No. 353-950
  • Mfr. Part No. P2R-05P
Subtotal (1 unit)
MYR13.40
MYR13.40/unit
In Stock
Omron G3HD Series Solid State Relay, 3 A Load, DIN Rail Mount, 240 V ac/dc Load, 24V ac/dc Control
  • RS Stock No. 266-355
  • Mfr. Part No. G3HD-X03SN-VD DC5-24
Subtotal (1 unit)
MYR123.75
MYR123.75/unit
In Stock
Finder DIN Rail Relay, 240V ac Coil, 16A Switching Current, DPST
  • RS Stock No. 257-7346
  • Mfr. Part No. 202282400000
Subtotal (1 unit)
MYR208.78
MYR208.78/unit
Limited stock
Omron 14 Way 250V ac DIN Rail Relay Socket, for use with Miniature Power Relays
  • RS Stock No. 186-4180
  • Mfr. Part No. PYFZ-14-E
Subtotal (1 unit)
MYR61.54
MYR61.54/unit
In Stock
Panasonic PCB Power Relay, 12V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 173-9095
  • Mfr. Part No. APF30212
Subtotal (1 tube of 20 units)
MYR434.50
MYR21.725/unit
In Stock
Turck Power Relay, 240V Coil, 10A Switching Current, 3PDT
  • RS Stock No. 842-3628
  • Mfr. Part No. C3-A30DX/240VDC
Subtotal (1 unit)
MYR264.95
MYR264.95/unit
In Stock
ABB CRP Series Interface Relay, DIN Rail, 24V dc Coil, DPDT, 8A
  • RS Stock No. 231-9487
  • Mfr. Part No. 1SVR405601R1000 CR-P024DC2
Subtotal (1 unit)
MYR31.39
MYR31.39/unit
In Stock
Finder Socket Power Relay, 24V dc Coil, 7A Switching Current, 4PDT
  • RS Stock No. 182-9939
  • Mfr. Part No. 55.34.9.024.0090
Subtotal (1 unit)
MYR61.61
MYR61.61/unit
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