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

17174 Products showing for Relays & Signal Conditioning

62 of 859
Temporarily out of stock
JM CONCEPT EOLIS 6000 Series Continuous Power Converter, DC Voltage Input, Current, Voltage Output, 22 → 240 V
  • RS Stock No. 232-5970
  • Mfr. Part No. EOLIS6000P2
Each
SGD702.82(exc. GST)
Last RS stock
Sensata / Crydom LN Series Solid State Relay, 50 A Load, Panel Mount, 280 V ac Load
  • RS Stock No. 227-0911
  • Mfr. Part No. LND2450C
Each
SGD161.81(exc. GST)
Last RS stock
Omron G3RV-SR Series Solid State Interface Relay, 24 V dc Control, 3 A Load, DIN Rail Mount
  • RS Stock No. 111-3010
  • Mfr. Part No. G3RV-SR500-D DC24
Each
SGD72.47(exc. GST)
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05 → 1s,
  • RS Stock No. 897-6728
  • Mfr. Part No. RE22R1MYMR
Each
SGD129.03(exc. GST)
In Stock
Phoenix Contact PLC-OSC- 24DC/24DC/2 Series Solid State Relay, DIN Rail Mount
  • RS Stock No. 306-6558
  • Mfr. Part No. 2966634
Each
SGD56.11(exc. GST)
In Stock
PR Electronics 6185 Series Loop Powered Isolator, Current Input, Current Output
  • RS Stock No. 796-6948
  • Mfr. Part No. 6185D
Each
SGD676.12(exc. GST)
In Stock
RS PRO DIN Rail Mount Timer Relay, 12 → 230V ac/dc, 0.1 s → 100h, SPDT
  • RS Stock No. 102-6127
Each
SGD68.71(exc. GST)
In Stock
Finder 39 Series Electromechanical Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 1-Pole
  • RS Stock No. 819-8805
  • Mfr. Part No. 39.01.0.024.0060
Each
SGD17.12(exc. GST)
In Stock
Phoenix Contact 1 Channel Galvanic Barrier, Isolating Amplifier, NAMUR Sensor, Switch Input, Relay Output, ATEX
  • RS Stock No. 751-1320
  • Mfr. Part No. 2865450
Each
SGD286.01(exc. GST)
In Stock
PR Electronics 3 Series Signal Conditioner, Current Input, Current Output, 6 → 35V dc Supply, ATEX, IECEx
  • RS Stock No. 136-8710
  • Mfr. Part No. 3186B2
Each
SGD369.64(exc. GST)
Temporarily out of stock
TE Connectivity Chassis Mount Power Relay, 18/32V Coil, 300A Switching Current, SPST-NO
  • RS Stock No. 170-716
  • Mfr. Part No. 30-311-12
Each
SGD290.46(exc. GST)
In Stock
Better World
Schneider Electric Plug In Power Relay, 120V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 884-1515
  • Mfr. Part No. RXM3AB2F7
Each
SGD17.19(exc. GST)
Temporarily out of stock
Siemens 3RA28 Series Clip-On Timer Relay, 90 → 240V ac/dc, 0.05 → 100s, 1-Function
  • RS Stock No. 155-998
  • Mfr. Part No. 3RA2831-1DH10
Each
SGD114.51(exc. GST)
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 12 A Load, DIN Rail Mount, 100 V dc Load, 32 V dc Control
  • RS Stock No. 922-1972
  • Mfr. Part No. SSM1D312BD
Each
SGD80.75(exc. GST)
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 50 A Load, Panel Mount, 300 V ac Load, 280 V ac Control
  • RS Stock No. 904-5677
  • Mfr. Part No. SSP1A150M7T
Each
SGD77.67(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 20 A Load, DIN Rail Mount
  • RS Stock No. 256-4782
  • Mfr. Part No. SSD1A320BDRC1
Each
SGD134.62(exc. GST)
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 10 A Load, Panel Mount, 300 V ac Load, 280 V ac Control
  • RS Stock No. 904-5645
  • Mfr. Part No. SSP1A110M7T
Each
SGD87.57(exc. GST)
In Stock
Omron G3R Series Solid State Relay, 2 A Load, Plug-In Mount, 264 V Load
  • RS Stock No. 215-1581
  • Mfr. Part No. G3R-OA202SLN-UTU DC5-24
Each
SGD40.06(exc. GST)
Temporarily out of stock
DIN Rail Impulse Relay, 12V ac Coil, 16A Switching Current, SPDT
  • RS Stock No. 255-918
  • Mfr. Part No. 265296 Z-S12/W
Each
SGD85.78(exc. GST)
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Current Input, Current Output, 9.6 → 30V dc Supply, ATEX
  • RS Stock No. 175-0488
  • Mfr. Part No. 2905629
Each
SGD298.43(exc. GST)
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