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

17001 Products showing for Relays & Signal Conditioning

7 of 851
In Stock
Phoenix Contact Pluggable Function Module for use with RIF-4, RIF-3, RIF-2, RIF-1
  • RS Stock No. 224-7569
  • Mfr. Part No. 2900944
Subtotal (1 pack of 10 units)
SGD39.89(exc. GST)
SGD3.989/unit
In Stock
Finder DIN Rail Non-Latching Relay, 24V Coil, 16A Switching Current
  • RS Stock No. 652-986
  • Mfr. Part No. 20.23.8.024.4000
Subtotal (1 unit)
SGD74.28(exc. GST)
SGD74.28/unit
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 90 A Load, Panel Mount, 660 V ac Load, 32V dc Control
  • RS Stock No. 904-5759
  • Mfr. Part No. SSP1A490BDT
Subtotal (1 unit)
SGD164.60(exc. GST)
SGD164.60/unit
In Stock
Finder 94 8 Way 250V DIN Rail Relay Socket
  • RS Stock No. 666-7968
  • Mfr. Part No. 94.020SMA
Subtotal (1 unit)
SGD11.49(exc. GST)
SGD11.49/unit
Limited stock
Omron P2RFZ 250V ac Surface Relay Socket, for use with Push-In Plus Socket
  • RS Stock No. 196-2321
  • Mfr. Part No. P2RFZ-05-E
Subtotal (1 unit)
SGD13.63(exc. GST)
SGD13.63/unit
In Stock
Finder 4C Series Interface Relay, DIN Rail, 230V ac Coil, SPDT, 5mA
  • RS Stock No. 123-2827
  • Mfr. Part No. 4C.P1.8.230.0060SPA
Subtotal (1 unit)
SGD34.97(exc. GST)
SGD34.97/unit
In Stock
Phoenix Contact PCB Power Relay, 12V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 508-0001
  • Mfr. Part No. 2961257
Subtotal (1 unit)
SGD11.60(exc. GST)
SGD11.60/unit
In Stock
GIC Monitoring Relay, 3 Phase, DPDT, DIN Rail, Base, 415V ac 28 V dc
  • RS Stock No. 884-2473
  • Mfr. Part No. MAC04D0100
Subtotal (1 unit)
SGD105.65(exc. GST)
SGD105.65/unit
In Stock
TE Connectivity Power Relay, 230V ac Coil, 12A Switching Current, DPDT
  • RS Stock No. 333-9957
  • Mfr. Part No. PT270730 5-1419111-1
Subtotal (1 unit)
SGD18.03(exc. GST)
SGD18.03/unit
In Stock
Endress+Hauser Galvanic Barrier, Relay, ATEX
  • RS Stock No. 256-6200
  • Mfr. Part No. RLN22-AA1A
Subtotal (1 unit)
SGD171.92(exc. GST)
SGD171.92/unit
Limited stock
Omron P2RFZ 2 Way 250V ac Surface Relay Socket, for use with Push-In Plus Socket
  • RS Stock No. 196-2322
  • Mfr. Part No. P2RFZ-08-E
Subtotal (1 unit)
SGD20.71(exc. GST)
SGD20.71/unit
In Stock
Finder Pluggable Function Module
  • RS Stock No. 159-458
  • Mfr. Part No. 86.30.0.024.0000
Subtotal (1 unit)
SGD49.17(exc. GST)
SGD49.17/unit
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 6 A Load, DIN Rail Mount, 100 V dc Load, 32V dc Control
  • RS Stock No. 922-1981
  • Mfr. Part No. SSM1D36BD
Subtotal (1 unit)
SGD71.17(exc. GST)
SGD71.17/unit
Stocked by manufacturer
Finder Power Relay Module, 230V ac Coil, 20A Switching Current, 4 CO
  • RS Stock No. 248-1836
  • Mfr. Part No. 563482302000
Subtotal (1 pack of 10 units)
SGD497.01(exc. GST)
SGD49.701/unit
Stocked by manufacturer
Omron Surface Power Relay, 24V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 133-098
  • Mfr. Part No. MY2N-D2-Y DC24
Subtotal (1 unit)
SGD36.89(exc. GST)
SGD36.89/unit
In Stock
Omron G3VM Series Solid State Relay, 9 A Load, Surface Mount, 30 V Load
  • RS Stock No. 237-9908
  • Mfr. Part No. G3VM-31HR1(TR05)
Subtotal (1 unit)
SGD12.93(exc. GST)
SGD12.93/unit
In Stock
Omron PCB Signal Relay, 12V dc Coil, 1A, DPDT
  • RS Stock No. 237-5340
  • Mfr. Part No. G5V-2-H1 DC12
Subtotal (1 unit)
SGD4.84(exc. GST)
SGD4.84/unit
Stocked by manufacturer
Phoenix Contact DIN Rail Relay, 24V ac Coil, 10mA Switching Current, 3PDT
  • RS Stock No. 487-406
  • Mfr. Part No. 2903703
Subtotal (1 unit)
SGD21.28(exc. GST)
SGD21.28/unit
In Stock
RS PRO Power Relay, 12V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 121-7810
Subtotal (1 unit)
SGD10.13(exc. GST)
SGD10.13/unit
In Stock
Better World
Schneider Electric Harmony Relay RXG 11 Way 250V DIN Rail Relay Socket, for use with Relais Series RSZ
  • RS Stock No. 884-1281
  • Mfr. Part No. RUZC3M
Subtotal (1 unit)
SGD9.78(exc. GST)
SGD9.78/unit
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