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    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
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    Relays
    Signal Conditioners & Isolators
    Signal Conditioners & Isolators

    15905 Products showing for Relays & Signal Conditioning

    4 of 796
    Omron PCB Mount Power Relay, 5V dc Coil, 5A Switching Current, SPST
    • RS Stock No. 512-9320
    • Mfr. Part No. G6D-1A-ASI DC5
    Each
    SGD10.20
    Eaton 2 Channel Zener Barrier, Switch/Proximity Detector Interface, NAMUR Sensor, Switch Input, Relay Output, ATEX
    • RS Stock No. 703-7040
    • Mfr. Part No. MTL5516C/RS
    Each
    SGD759.11
    Omron Basic Unit G9SX Time Delay Safety Relay, 24V dc, Single/Dual-Channel, 2 Safety Contacts
    • RS Stock No. 214-6821
    • Mfr. Part No. G9SX-BC202-RC DC24
    Each
    SGD577.91
    Eaton Phase, Voltage Monitoring Relay, 200 → 500V ac, DIN Rail
    • RS Stock No. 179-3516
    • Mfr. Part No. 184789 EMR6-F500-G-1
    Each
    SGD206.40
    Omron PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPST
    • RS Stock No. 686-7073
    • Mfr. Part No. G2RG-2A4 DC24
    Each
    SGD6.16
    TE Connectivity Flange Mount Power Relay, 120V ac Coil, 30A Switching Current, DPST
    • RS Stock No. 680-2587
    • Mfr. Part No. T92P7A22-120=T92
    Each
    SGD36.27
    Omron Panel Mount Power Relay, 12V dc Coil, 3A Switching Current, 4PDT
    • RS Stock No. 376-723
    • Mfr. Part No. MY4H-US DC12
    Each
    SGD130.53
    Better World
    Schneider Electric PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 742-3766
    • Mfr. Part No. RSB2A080BD
    Each
    SGD12.24
    Better World
    Schneider Electric Harmony Relay RXG 5 Pin 250V DIN Rail Relay Socket, for use with RXG Series Relay
    • RS Stock No. 852-6894
    • Mfr. Part No. RGZE1S35M
    Each
    SGD6.78
    Finder 38 Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPST
    • RS Stock No. 666-7930
    • Mfr. Part No. 38.41.7.024.9024
    Each
    SGD94.69
    Omron Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
    • RS Stock No. 111-3095
    • Mfr. Part No. K8DT-AS3CA
    Each
    SGD261.92
    Durakool Plug In Power Relay, 24V dc Coil, 60A Switching Current, SPDT
    • RS Stock No. 915-6682
    • Mfr. Part No. DG85F-7011-96-1024-M1
    Each
    SGD8.30
    Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, Current, Voltage Output, 24V dc Supply
    • RS Stock No. 616-8938
    • Mfr. Part No. 2865007
    Each
    SGD634.64
    Finder 48 Series Interface Relay, DIN Rail Mount, 12V dc Coil, DPDT, 2-Pole
    • RS Stock No. 623-7141
    • Mfr. Part No. 48.52.7.012.0050SPA
    Each
    SGD24.60
    Finder Force Guided Relay, 24V dc Coil Voltage, 6 Pole, 5NO/1NC
    • RS Stock No. 249-4458
    • Mfr. Part No. 7S.36.9.024.5510
    Each
    SGD181.53
    Better World
    Schneider Electric Plug In Power Relay, 125V dc Coil, 8A Switching Current, 4PDT
    • RS Stock No. 884-1553
    • Mfr. Part No. RXM4AB2GD
    Each
    SGD18.69
    Phoenix Contact PCB Mount Power Relay, 12V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 508-0001
    • Mfr. Part No. 2961257
    Each
    SGD13.80
    Panasonic Surface Mount Signal Relay, 12V dc Coil, 3A Switching Current, SPST
    • RS Stock No. 815-4896
    • Mfr. Part No. DS1E-M-DC12V
    Each
    SGD6.39
    Phoenix Contact RIF-1-RPT-LDP-24DC/2X21 Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
    • RS Stock No. 794-3721
    • Mfr. Part No. 2903334
    Each
    SGD17.23
    Turck Module
    • RS Stock No. 808-6594
    • Mfr. Part No. WM1
    Each
    SGD29.32
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