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

803 of 859
Temporarily out of stock
Sensata Cynergy3 PCB Mount Reed Relay, 24V dc Coil, SPST, 7000V Max, 2 A Max, 780Ω
  • RS Stock No. 189-2161
  • Mfr. Part No. DAT72405U
1 Box of 20
SGD1,104.16(exc. GST)
In Stock
Relay module, 24 V DC
  • RS Stock No. 600-277
  • Mfr. Part No. 1479850000
Each
SGD26.89(exc. GST)
Temporarily out of stock
Relay module, 24 V DC
  • RS Stock No. 577-556
  • Mfr. Part No. 2576190000
Each
SGD39.88(exc. GST)
Temporarily out of stock
Panasonic PCB Mount Power Relay, 12V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 134-7874
  • Mfr. Part No. APAN3112
Each (In a Tube of 25)
SGD6.874(exc. GST)
Temporarily out of stock
Finder PCB Mount Power Relay, 12V Coil, 30A Switching Current, DPST
  • RS Stock No. 652-969
  • Mfr. Part No. 66.22.9.012.1300
Each
SGD31.87(exc. GST)
Temporarily out of stock
Siemens 3RF2 Series Solid State Relay, 55 A Load, Chassis Mount, 600 V ac Load, 30 Vdc Control
  • RS Stock No. 153-243
  • Mfr. Part No. 3RF2255-3AB45
Each
SGD248.16(exc. GST)
In Stock
Weidmuller TOZ Series Solid State Interface Relay, DIN Rail Mount
  • RS Stock No. 892-8892
  • Mfr. Part No. 1127530000
Each
SGD36.13(exc. GST)
Temporarily out of stock
Gefran GRZ-H Series Solid State Relay 3 Phase, 50 A Load, DIN Rail, Panel Mount, 600 V ac Load, 260 V ac/dc Control
  • RS Stock No. 600-664
  • Mfr. Part No. GRZ-H-3P-2S-50-60-A-2-FAN62-0
Each
SGD835.34(exc. GST)
In Stock
Finder PCB Mount Power Relay, 110V ac Coil, 16A Switching Current, SPDT
  • RS Stock No. 534-5291
  • Mfr. Part No. 46.61.8.110.0054
Each
SGD24.05(exc. GST)
In Stock
Carlo Gavazzi RA 24 Series Solid State Relay, 25 A Load, Panel Mount, 280 V ac Load, 280V ac/dc Control
  • RS Stock No. 856-8396
  • Mfr. Part No. RA2425HA06
Each
SGD112.04(exc. GST)
In Stock
TE Connectivity Flange Mount, Panel Mount Power Relay, 24V dc Coil, 30A Switching Current, SPST-NO
  • RS Stock No. 279-8781
  • Mfr. Part No. 6-1419102-3
Each
SGD13.22(exc. GST)
In Stock
Finder Panel Mount Modular Step Relay, 24V ac Coil, 10A Switching Current, DPST
  • RS Stock No. 257-7353
  • Mfr. Part No. 260880240000
Each
SGD32.77(exc. GST)
In Stock
ATC Phase, Voltage Monitoring Relay, 3 Phase, SPDT
  • RS Stock No. 286-818
  • Mfr. Part No. SLU0200
Each
SGD287.21(exc. GST)
In Stock
ABB DIN Rail Latching Power Relay, 230V ac Coil, 16A Switching Current, SPST
  • RS Stock No. 231-9987
  • Mfr. Part No. 2TAZ312000R2011 E290-16-10/230
Each
SGD81.05(exc. GST)
Temporarily out of stock
Relay module, 230 V AC
  • RS Stock No. 577-527
  • Mfr. Part No. 8897260000
Each
SGD32.14(exc. GST)
Temporarily out of stock
Omron Plug In Timer Relay, 100-120V ac, 4-Contact, 0.1 → 600s, DPDT
  • RS Stock No. 264-1671
  • Mfr. Part No. H3YN-2 100-120VAC
Each
SGD107.48(exc. GST)
In Stock
Omron H3DT Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.1 s → 1200 h, 1-Function, SPDT
  • RS Stock No. 106-6240
  • Mfr. Part No. H3DT-F 24-240VAC/DC
Each
SGD157.76(exc. GST)
Temporarily out of stock
Finder Plug In Relay, 60V dc Coil, 10A Switching Current, 3PDT, 3PDT
  • RS Stock No. 248-1483
  • Mfr. Part No. 551390600000
Each (In a Pack of 10)
SGD25.365(exc. GST)
In Stock
Panasonic AQY Series Solid State Relay, 250 mA Load, PCB Mount, 40 V ac/dc Load
  • RS Stock No. 247-4270
  • Mfr. Part No. AQY221R2M1Y
Each
SGD10.91(exc. GST)
In Stock
Siemens Current Monitoring Relay, 1 Phase, DPDT
  • RS Stock No. 231-8400
  • Mfr. Part No. 5SV8101-4KK
Each
SGD2,393.01(exc. GST)
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