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    Relays & Signal Conditioning

    We stock a large choice of relay 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 from trusted brands 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 is operated electronically to turn on or off current within an electric circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, the main difference is that 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 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 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's feature semiconductor switching elements, typically thyristors, triacs and diodes that transmits and energises 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.
    Relay Accessories
    Relay Accessories
    Relays
    Relays
    Signal Conditioners & Isolators
    Signal Conditioners & Isolators

    16824 Products showing for Relays & Signal Conditioning

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    Carlo Gavazzi Plug In Power Relay, 24V ac Coil, 10A Switching Current, DPDT
    • RS Stock No. 272-5991
    • Mfr. Part No. RMIA21024VAC
    Omron Plug In Power Relay, 24V dc Coil, 5A Switching Current, 4PDT
    • RS Stock No. 794-8145
    • Mfr. Part No. MY4IN1 DC24(S)
    Finder PCB Mount Power Relay, 24V ac Coil, 8A Switching Current, DPDT
    • RS Stock No. 376-802
    • Mfr. Part No. 40.52.8.024.0000
    Broyce Control Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
    • RS Stock No. 850-5389
    • Mfr. Part No. LXPRT-4W 230V (400V)
    Better World
    Schneider Electric Level Monitoring Relay, 1 Phase, DPDT, DIN Rail
    • RS Stock No. 124-0193
    • Mfr. Part No. RM35LM33MW
    Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 5A Load
    • RS Stock No. 203-5194
    • Mfr. Part No. RXG22BDPV
    Finder DIN Rail Relay, 24V dc Coil, 20A Switching Current, DPST-NO
    • RS Stock No. 511-1149
    • Mfr. Part No. 22.22.9.024.4000
    RS PRO Plug In Power Relay, 12V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 348-756
    Releco MRC 8 Pin 250V ac DIN Rail Relay Socket, for use with IRC Series
    • RS Stock No. 613-8151
    • Mfr. Part No. S-12
    Omron Plug In Power Relay, 110V ac Coil, 10A Switching Current, SPDT
    • RS Stock No. 353-859
    • Mfr. Part No. G2R-1-SN AC110(S)
    Dold Safemaster BD 5987 Emergency Stop Safety Relay, 230V ac, Dual-Channel, 2 Safety Contacts
    • RS Stock No. 240-8743
    • Mfr. Part No. BD5987.02/001 AC50/60Hz 230V
    Omron Plug In Power Relay, 12V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 353-821
    • Mfr. Part No. G2R-1-SN DC12(S)
    RS PRO Plug In Power Relay, 240V ac Coil, 5A Switching Current, 4PDT
    • RS Stock No. 394-9116
    RS PRO Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24 → 240V ac/dc Supply
    • RS Stock No. 192-3390
    Pilz PNOZsigma PNOZ s10 C Expansion Module Safety Relay, 24V dc, Dual-Channel, 4 Safety Contacts
    • RS Stock No. 191-9861
    • Mfr. Part No. 751110
    RS PRO Plug In Power Relay, 24V ac Coil, 6A Switching Current, 4PDT
    • RS Stock No. 121-7799
    Omron H3CR Series DIN Rail, Panel Mount Timer Relay, 100 → 240V ac, 2-Contact, 0.05 s → 300 h,
    • RS Stock No. 188-4584
    • Mfr. Part No. H3CR-F8 AC100-240
    Eaton 2 Channel Zener Barrier, Switch/Proximity Detector Interface, RTD, Thermocouple Input, ATEX
    • RS Stock No. 612-5341
    • Mfr. Part No. MTL7760AC/RS
    RS PRO Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 450-0352
    Finder Plug In Power Relay, 230V ac Coil, 7A Switching Current, 4PDT
    • RS Stock No. 385-957
    • Mfr. Part No. 55.34.8.230.0040
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    Guides & Articles

    Article image
    Solid State Relays Guide
    This complete guide looks at what solid state relays are, how they work, the various circuits and the different types that are currently available.
    Read more
    Article image
    Latching Relays Guide
    In our comprehensive guide we look at what latching relays are, what types and sizes are available, as well as the different uses of latching relays.
    Read more

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