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

17467 Products showing for Relays & Signal Conditioning

869 of 874
Stocked by manufacturer
Finder Relay, 24V dc Coil, 10A Switching Current, 2 CO
  • RS Stock No. 248-1548
  • Mfr. Part No. 553290245074
Subtotal (1 pack of 10 units)
SGD256.90(exc. GST)
SGD25.69/unit
New product - Preorder today
TE Connectivity AGASTAT 2100 Series Panel Mount Time Delay Relay, 2-Contact, 125 V DC, 0.03 to 180 s, 1-Function, DPDT
  • RS Stock No. 788-212
  • Mfr. Part No. 1423151-5
Subtotal (1 unit)
SGD11,437.26(exc. GST)
SGD11,437.26/unit
Stocked by manufacturer
Phoenix Contact MINI MCR Series Solenoid Driver, Voltage Input, Voltage Output, ATEX
  • RS Stock No. 518-337
  • Mfr. Part No. 2908810
Subtotal (1 unit)
SGD462.23(exc. GST)
SGD462.23/unit
Stocked by manufacturer
Phoenix Contact PSRclassic, 24V dc Safety Relay, 2 Safety Contacts, 2
  • RS Stock No. 517-709
  • Mfr. Part No. 1301402
Subtotal (1 unit)
SGD337.20(exc. GST)
SGD337.20/unit
Stocked by manufacturer
TE Connectivity SSRK Series Relay, 30 A Load, DIN Rail Mount, 660 Vrms Load, 280V Control
  • RS Stock No. 679-514
  • Mfr. Part No. 7-1393030-1
Subtotal (1 pack of 2 units)
SGD306.01(exc. GST)
SGD306.01/pack
Temporarily out of stock
TE Connectivity SSRMP Series Solid State Relay, 25 A Load, Panel Mount, 480 V Load
  • RS Stock No. 204-7653
  • Mfr. Part No. SSRMP-480D25R
Subtotal (1 unit)
SGD45.28(exc. GST)
SGD45.28/unit
Stocked by manufacturer
Phoenix Contact PSR, 24V Coupling Relay, 1 Safety Contacts
  • RS Stock No. 517-773
  • Mfr. Part No. 1119573
Subtotal (1 unit)
SGD240.86(exc. GST)
SGD240.86/unit
Stocked by manufacturer
TE Connectivity Socket Relay, 6V dc Coil, 7.5A Switching Current, DPDT
  • RS Stock No. 678-199
  • Mfr. Part No. 8-1393765-5
Subtotal (1 pack of 3 units)
SGD440.71(exc. GST)
SGD440.71/pack
New product - Preorder today
TE Connectivity Board Power Relay, 24V Coil, 10A Switching Current, 3PDT-CO
  • RS Stock No. 797-531
  • Mfr. Part No. 7-1419111-1
Subtotal (1 box of 20 units)
SGD700.80(exc. GST)
SGD700.80/box
Stocked by manufacturer
Phoenix Contact 2852353 2 Way 24V ac/dc Module, for use with Switching Relay
  • RS Stock No. 522-372
  • Mfr. Part No. 2852353
Subtotal (1 unit)
SGD176.18(exc. GST)
SGD176.18/unit
Stocked by manufacturer
Phoenix Contact 1277 Series Solenoid Driver, Voltage Input, Transistor Output, 30V Supply, IECEx/ATEX
  • RS Stock No. 517-676
  • Mfr. Part No. 1277116
Subtotal (1 unit)
SGD479.15(exc. GST)
SGD479.15/unit
Stocked by manufacturer
Phoenix Contact 1291 Series Solenoid Driver, Voltage Input, Digital Output, IECEx, ATEX
  • RS Stock No. 518-134
  • Mfr. Part No. 1291186
Subtotal (1 unit)
SGD531.97(exc. GST)
SGD531.97/unit
Stocked by manufacturer
Phoenix Contact 2911692 Series Solid State Relay, 100 mA Load, DIN Rail Mount, 48 V dc Load, 26.4V ac Control
  • RS Stock No. 518-342
  • Mfr. Part No. 2911692
Subtotal (1 unit)
SGD150.16(exc. GST)
SGD150.16/unit
New product - Preorder today
TE Connectivity Plug-in General Purpose Relay, 12V dc Coil, 2A Switching Current, 2 Form C (CO)
  • RS Stock No. 814-781
  • Mfr. Part No. 9-1393765-8
Subtotal (1 pack of 3 units)
SGD452.76(exc. GST)
SGD452.76/pack
New product - Preorder today
TE Connectivity 7022PJX Series Panel Mount Time Delay Relay, 2-Contact, 125 VDC, 0.2 to 2 s, 1-Function, 2 Form C (CO)
  • RS Stock No. 814-774
  • Mfr. Part No. 8-1472969-4
Subtotal (1 unit)
SGD2,040.09(exc. GST)
SGD2,040.09/unit
Stocked by manufacturer
TE Connectivity HMS Series Relay, Through Hole, 18V dc Coil
  • RS Stock No. 677-355
  • Mfr. Part No. 6-1617039-9
Subtotal (1 unit)
SGD647.32(exc. GST)
SGD647.32/unit
Currently unavailable
Omron G3VM Series PCB Mount Solid State Relays, 0.7 A Load, Surface Mount Mount, 200 V Load
  • RS Stock No. 685-254
  • Mfr. Part No. G3VM1397M
Subtotal (1 pack of 40 units)
SGD474.38(exc. GST)
SGD474.38/pack
Stocked by manufacturer
Eaton HLR Series Solid State Relay, 25 A Load, Chassis Mount, 600 V ac Load, 32V dc Control
  • RS Stock No. 261-568
  • Mfr. Part No. 360041 HLR25/1(DC)600V
Subtotal (1 unit)
SGD140.01(exc. GST)
SGD140.01/unit
Stocked by manufacturer
Phoenix Contact MACX Series Relay, Voltage Input, Voltage Output, ATEX, IECEx
  • RS Stock No. 517-701
  • Mfr. Part No. 1292332
Subtotal (1 unit)
SGD387.62(exc. GST)
SGD387.62/unit
New product - Preorder today
Lovato HS3C Series Relay, 25 A Load, DIN Rail Mount, 600 V Load, 32V Control
  • RS Stock No. 820-443
  • Mfr. Part No. HS3C6HV025D024
Subtotal (1 unit)
SGD502.51(exc. GST)
SGD502.51/unit
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