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

841 of 859
In Stock
Omron G3VM Series Solid State Relay, 3.5 A Load, DIP Mount, 40 V Load
  • RS Stock No. 205-1901
  • Mfr. Part No. G3VM-41ER
Each
SGD16.02(exc. GST)
In Stock
ABB R600 Series Interface Relay, DIN Rail Mount, 110V ac/dc Coil, DPDT, 6A Load
  • RS Stock No. 670-0037
  • Mfr. Part No. 1SNA645041R0200 RB122G-115VUC
Each
SGD56.26(exc. GST)
In Stock
Sensata Crydom DRA1 SERIES Series Solid State Relay, 3 A Load, PCB Mount, 60 V dc Load, 32 V dc Control
  • RS Stock No. 613-8123
  • Mfr. Part No. MPDCD3-B
Each
SGD72.17(exc. GST)
Temporarily out of stock
Siemens 3RF2 Series Solid State Relay, 30 A Load, Chassis Mount, 600 V Load, 660 V Control
  • RS Stock No. 266-9450
  • Mfr. Part No. 3RF2230-2AC45
Each
SGD348.93(exc. GST)
Temporarily out of stock
Omron H5CC Series Flush Mount Timer Relay, 100 → 240V, 0.001s → 999999h, 2-Function
  • RS Stock No. 402-730
  • Mfr. Part No. H5CC-L8S
Each
SGD306.72(exc. GST)
Temporarily out of stock
Gefran GRS-H Series Solid State Relay, 25 A Load, DIN Rail, Panel Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 601-629
  • Mfr. Part No. GRS-H-25-48-DD-0-0-0-0
Each
SGD149.25(exc. GST)
In Stock
Hongfa Europe GMBH 5 Pin 250V ac DIN Rail Relay Socket, for use with HF41F Series Relays
  • RS Stock No. 923-2625
  • Mfr. Part No. 41F-1Z-C1-4
Each
SGD11.41(exc. GST)
Temporarily out of stock
Siemens Thermistor motor protection relay Monitoring Relay, DIN Rail
  • RS Stock No. 275-2213
  • Mfr. Part No. 7SR5710-2AA11-1AA0
Each
SGD8,372.39(exc. GST)
Temporarily out of stock
Finder Panel Mounting Adaptor for Modular Step Relays, 02001
  • RS Stock No. 248-1736
  • Mfr. Part No. 02001
Each (In a Pack of 100)
SGD0.575(exc. GST)
In Stock
Finder Plug In Power Relay, 12V dc Coil, 12A Switching Current, DPDT
  • RS Stock No. 154-605
  • Mfr. Part No. 56.32.9.012.0040
Each
SGD19.03(exc. GST)
In Stock
Celduc SK Series Solid State Relay, 4 A Load, PCB Mount, 460 V ac Load, 30 V dc Control
  • RS Stock No. 425-4734
  • Mfr. Part No. SKA20440
Each
SGD55.78(exc. GST)
In Stock
IXYS Solid State Relay, 1.2 A dc Load, Surface Mount
  • RS Stock No. 906-1029
  • Mfr. Part No. CPC1020N
Each (In a Bag of 5)
SGD3.936(exc. GST)
Temporarily out of stock
Gefran GRZ-H Series Solid State Relay, 20 A Load, DIN Rail Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 601-165
  • Mfr. Part No. GRZ-H-3P-3S-20I-48-D-3-0-0
Each
SGD540.45(exc. GST)
In Stock
Omron PCB Mount Power Relay, 24V dc Coil, 10A Switching Current, DPST
  • RS Stock No. 683-9087
  • Mfr. Part No. G4W-2212P-US-TV5 DC24
Each
SGD14.51(exc. GST)
In Stock
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 164-1390
  • Mfr. Part No. V23057B6A102
Each (In a Box of 20)
SGD24.127(exc. GST)
Temporarily out of stock
Sensata Cynergy3 PCB Mount Reed Relay, 24V dc Coil, SPST, 7000V Max, 2 A Max, 780Ω
  • RS Stock No. 189-2170
  • Mfr. Part No. DAT72405FU
1 Box of 20
SGD1,408.37(exc. GST)
Temporarily out of stock
Gefran GRZ-H Series Solid State Relay 3 Phase, 50 A Load, DIN Rail, Panel Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 601-687
  • Mfr. Part No. GRZ-H-3P-2S-50-48-D-0-FAN64-0
Each
SGD712.57(exc. GST)
Temporarily out of stock
Omron PCB Mount Non-Latching Relay, 5V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 232-6287
  • Mfr. Part No. G5Q-1-HA-PW DC5 (TY)
Each (In a Tray of 500)
SGD2.695(exc. GST)
Temporarily out of stock
Phoenix Contact PSRmini PSR-MC72 0 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 2 Safety Contacts
  • RS Stock No. 201-5354
  • Mfr. Part No. 2702096
Each
SGD419.32(exc. GST)
Temporarily out of stock
Omron G3NA Series Solid State Relay, 40 A Load, DIN Rail Mount, 264 V ac/dc Load, 240 V ac/dc Control
  • RS Stock No. 266-361
  • Mfr. Part No. G3NA-240B-UTU AC100-240
Each
SGD107.56(exc. GST)
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