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

17824 Products showing for Relays & Signal Conditioning

12 of 892
Last RS stock
Omron Flange Power Relay, 12V dc Coil, 25A Switching Current, DPST
  • RS Stock No. 828-7117
  • Mfr. Part No. G7L-2A-TUB-J-CB-DC12
Subtotal (1 unit)
SGD18.22(exc. GST)
SGD18.22/unit
In Stock
TE Connectivity PCB Non-Latching Relay, 24V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 376-767
  • Mfr. Part No. RP3SL024 1-1393230-1
Subtotal (1 unit)
SGD30.20(exc. GST)
SGD30.20/unit
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply, ATEX
  • RS Stock No. 134-8669
  • Mfr. Part No. 2905026
Subtotal (1 unit)
SGD434.11(exc. GST)
SGD434.11/unit
In Stock
PR Electronics 4100 Series Universal Transmitter, Universal Input, Current/Voltage Output, 21.6 V ac, 253 V ac, 19.2V
  • RS Stock No. 796-6887
  • Mfr. Part No. 4114
Subtotal (1 unit)
SGD597.39(exc. GST)
SGD597.39/unit
In Stock
Finder 38.51 Series Interface Relay Module, Rail, 24V Coil, SPDT
  • RS Stock No. 653-006
  • Mfr. Part No. 38.51.7.024.5050
Subtotal (1 unit)
SGD42.14(exc. GST)
SGD42.14/unit
In Stock
Finder Power Relay, 48V dc Coil, 20A Switching Current, DPDT
  • RS Stock No. 189-3178
  • Mfr. Part No. 55.32.9.048.0040
Subtotal (1 unit)
SGD15.02(exc. GST)
SGD15.02/unit
In Stock
RS PRO CRINT-S11 24V ac/dc DIN Rail Relay Socket, for use with RS PRO 1 Pole PCB Relays
  • RS Stock No. 282-4492
Subtotal (1 unit)
SGD14.07(exc. GST)
SGD14.07/unit
Limited stock
Omron Power Relay, 24V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 353-887
  • Mfr. Part No. G2R-2-SN 24VDC (S)
Subtotal (1 unit)
SGD28.23(exc. GST)
SGD28.23/unit
Temporarily out of stock
Sensata / Crydom Panel Relay Heatsink
  • RS Stock No. 703-4558
  • Mfr. Part No. HS072
Subtotal (1 unit)
SGD80.91(exc. GST)
SGD80.91/unit
In Stock
RS PRO DIN Rail Timer Relay, 2-Contact, 24 V dc 24V ac, 240 V ac, 01. s to 999 h, Multifunction-Function, DPST Switch
  • RS Stock No. 896-6860
Subtotal (1 unit)
SGD71.88(exc. GST)
SGD71.88/unit
In Stock
Omron Power Relay, 12V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 329-783
  • Mfr. Part No. LY2 12VDC
Subtotal (1 unit)
SGD19.31(exc. GST)
SGD19.31/unit
Stocked by manufacturer
Omron Surface Power Relay, 100V dc, 110 V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 107-764
  • Mfr. Part No. MY4-02 DC100/110
Subtotal (1 unit)
SGD17.24(exc. GST)
SGD17.24/unit
In Stock
ATC 407C Series Multi-Timer, 1-Contact, 24 V dc 24V ac, 240 V ac, 1 min to 10 h, Multifunction-Function, SPDT Switch
  • RS Stock No. 286-805
  • Mfr. Part No. 407C500F3X
Subtotal (1 unit)
SGD458.11(exc. GST)
SGD458.11/unit
In Stock
PR Electronics 9100 Series Temperature Converter, Thermocouple, Current, RTD Input, Current, Relay Output, 19.2V dc,
  • RS Stock No. 796-7048
  • Mfr. Part No. 9113BB
Subtotal (1 unit)
SGD972.34(exc. GST)
SGD972.34/unit
In Stock
Omron H3Y-4 Series DIN Rail Timer Relay, 4-Contact, 125 V dc 24V ac, 2 to 60 s, 1-Function, 4PDT Switch Configuration
  • RS Stock No. 340-487
  • Mfr. Part No. H3Y-4 AC24 60S
Subtotal (1 unit)
SGD100.35(exc. GST)
SGD100.35/unit
Limited stock
Omron Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 828-7328
  • Mfr. Part No. LY2N 24VDC
Subtotal (1 unit)
SGD33.68(exc. GST)
SGD33.68/unit
Stocked by manufacturer
Omron PCB Power Relay, 24V dc Coil, 23A Switching Current, SPST
  • RS Stock No. 266-330
  • Mfr. Part No. G2RL-1A-E2-CV-HA DC24
Subtotal (1 unit)
SGD6.94(exc. GST)
SGD6.94/unit
In Stock
Siemens 3RF2 Series Solid State Relay, 30 A Load, DIN Rail Mount, 600 V Load, 30V dc Control
  • RS Stock No. 612-9034
  • Mfr. Part No. 3RF2430-1AC45
Subtotal (1 unit)
SGD595.88(exc. GST)
SGD595.88/unit
In Stock
Finder Pluggable Function Module for use with Finder Series
  • RS Stock No. 666-8015
  • Mfr. Part No. 99.02.9.024.99
Subtotal (1 unit)
SGD6.55(exc. GST)
SGD6.55/unit
In Stock
Pilz PNOZ X3, 24V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 245-1848
  • Mfr. Part No. 774310
Subtotal (1 unit)
SGD584.53(exc. GST)
SGD584.53/unit
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