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

17016 Products showing for Relays & Signal Conditioning

1 / 851
In Stock
Weidmüller ACT20X Series Signal Conditioner, Current Input, Current Output, 19.2V, 31.2 V Supply, IECEx
  • RS Stock No. 902-8032
  • Mfr. Part No. 8965460000
Subtotal (1 unit)
MYR1,493.26
Limited stock
Sensata / Crydom 1-DC Series Solid State Relay, 80 A Load, Surface Mount, 100 V Load, 32V Control
  • RS Stock No. 703-4687
  • Mfr. Part No. D1D80
Subtotal (1 unit)
MYR664.25
In Stock
Celduc SO9 Series Solid State Relay, 90 A Load, DIN Rail Mount, 600 Vrms Load, 32V Control
  • RS Stock No. 499-0503
  • Mfr. Part No. SO967460
Subtotal (1 unit)
MYR305.15
In Stock
RS PRO LMMT Series DIN Rail Timer Relay, 2-Contact, 230 V dc 230V ac, 24 V ac, 0.1 s to 100 h, Multifunction-Function,
  • RS Stock No. 102-6123
Subtotal (1 unit)
MYR157.00
In Stock
Releco Power Relay, 24V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 341-5146
  • Mfr. Part No. C10-A10X / DC 24 V
Subtotal (1 unit)
MYR78.15
Last RS stock
Omron Power Relay, 240V ac Coil, 10A Switching Current, 4PDT
  • RS Stock No. 827-7845
  • Mfr. Part No. LY4-AC240
Subtotal (1 unit)
MYR72.86
In Stock
Omron Power Relay, 100V dc, 110 V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 271-1932
  • Mfr. Part No. MY4-GS-R DC100/110
Subtotal (1 unit)
MYR56.49
In Stock
RS PRO Power Relay, 24V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 121-7812
Subtotal (1 unit)
MYR38.82
In Stock
Omron Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 794-8110
  • Mfr. Part No. G2R-1-SND 24VDC (S)
Subtotal (1 unit)
MYR67.29
In Stock
Eurotherm Solid State Relay, 40 A Load, 240 V Load, 32V dc Control
  • RS Stock No. 906-0916
  • Mfr. Part No. ESWITCH/40A/240V/LGC/ENG/-/MSFUSE/-/-
Subtotal (1 unit)
MYR1,629.81
Temporarily out of stock
TE Connectivity Power Relay, 24V dc Coil, 10A Switching Current, SPST
  • RS Stock No. 763-1462
  • Mfr. Part No. KUEP-3D15-24 1393114-1
Subtotal (1 box of 50 units)
MYR8,169.48
In Stock
Celduc SO9 Series Solid State Relay, 12 A Load, DIN Rail Mount, 280 Vrms Load, 32V Control
  • RS Stock No. 499-0446
  • Mfr. Part No. SO941460
Subtotal (1 unit)
MYR173.31
In Stock
RS PRO 3RS7002 Series Signal Conditioner, Voltage Input, Voltage Output, 24V dc Supply
  • RS Stock No. 466-2236
Subtotal (1 unit)
MYR891.71
In Stock
RS PRO PCB Power Relay, 12V dc Coil, 25A Switching Current, SPST
  • RS Stock No. 476-561
Subtotal (1 unit)
MYR28.34
In Stock
Omron Power Relay, 12V dc Coil, 20A Switching Current, SPST
  • RS Stock No. 200-2020
  • Mfr. Part No. G4A-1A-E DC12
Subtotal (1 unit)
MYR16.17
Limited stock
Sensata / Crydom D2 Series Solid State Relay, 25 A Load, Panel Mount, 280 Vrms Load, 32V Control
  • RS Stock No. 346-918
  • Mfr. Part No. D2425
Subtotal (1 unit)
MYR339.55
In Stock
Omron Power Relay, 24V dc Coil, 10A Switching Current, 4PDT
  • RS Stock No. 827-7854
  • Mfr. Part No. LY4-D 24VDC
Subtotal (1 unit)
MYR150.08
In Stock
PR Electronics Programming Display, Current Output, 20V, 6.5 V Supply
  • RS Stock No. 238-0641
  • Mfr. Part No. 4510
Subtotal (1 unit)
MYR571.12
In Stock
Relpol Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 805-2201
  • Mfr. Part No. R15-2012-23-1024-WTL
Subtotal (1 unit)
MYR130.02
In Stock
GIC 1CJ Series DIN Rail Timer Relay, 1-Contact, 240 V dc 12V ac, 240 V ac, 0.1 s to 100 h, Multifunction-Function, SPDT
  • RS Stock No. 818-4563
  • Mfr. Part No. 1CMDT0
Subtotal (1 unit)
MYR155.44
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