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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

    16461 Products showing for Relays & Signal Conditioning

    3 of 824
    Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V ac Coil, DPDT, 5A Load
    • RS Stock No. 203-5239
    • Mfr. Part No. RXG21B7PV
    Each
    £24.74
    RS PRO Plug In Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
    • RS Stock No. 348-813
    Each
    £10.60
    Brodersen Systems XMW-S1 Series Plug In Timer Relay, 10.5 → 265V ac/dc, 1-Contact, 0.6min, SPDT
    • RS Stock No. 308-0790
    • Mfr. Part No. XMW-S1
    Each
    £49.39
    Weidmüller DIN Rail Power Relay, 24V dc Coil, DPDT
    • RS Stock No. 288-1810
    • Mfr. Part No. 2476890000
    Each
    £8.76
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 V dc, 24 → 240V ac, 2-Contact, 0.1 s
    • RS Stock No. 791-2745
    • Mfr. Part No. RE17RMMU
    Each
    £59.96
    RS PRO DIN Rail Mount Timer Relay, 12 → 230V ac/dc, 0.1 s → 100h, SPDT
    • RS Stock No. 102-6124
    Each
    £32.95
    Pilz PNOZ X PNOZ X2.1 Emergency Stop Safety Relay, 24V ac/dc, Dual-Channel, 2 Safety Contacts
    • RS Stock No. 239-1055
    • Mfr. Part No. 774306
    Each
    £158.57
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 V dc, 24 → 240V ac, 2-Contact, 1 s
    • RS Stock No. 791-2758
    • Mfr. Part No. RE17RMXMU
    Each
    £59.98
    RS PRO DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, CO
    • RS Stock No. 896-6813
    Each
    £37.39
    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
    Each
    £12.81
    Wieland flare Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole
    • RS Stock No. 341-4812
    • Mfr. Part No. 80.010.4100.0
    Each
    £14.32
    RS PRO Plug In Timer Relay, 110V ac, 4-Contact, 0.5 → 10s, 1-Function, 4PDT
    • RS Stock No. 179-2969
    Each
    £35.73
    Better World
    Schneider Electric Harmony Relay Series Solid State Relay, 6 A Load, DIN Rail Mount, 100 V dc Load, 32 V dc Control
    • RS Stock No. 922-1981
    • Mfr. Part No. SSM1D36BD
    Each
    £37.18
    Durakool DZ 5 Pin Flange Mount Relay Socket, for use with Mini-ISO Relays
    • RS Stock No. 276-6012
    • Mfr. Part No. DZ85AB-5-WH2
    Each
    £4.09
    RS PRO Plug In Power Relay, 24V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 144-1594
    Each
    £7.55
    Wieland DIN Rail Power Relay, 24V dc Coil, 6A Switching Current, SPDT
    • RS Stock No. 469-4182
    • Mfr. Part No. 80.063.4032.0
    Each
    £5.85
    Pilz PNOZ X PNOZ X9P Emergency Stop Safety Relay, 24 → 240V ac/dc, Single/Dual-Channel, 7 Safety Contacts
    • RS Stock No. 489-6388
    • Mfr. Part No. 777606
    Each
    £448.37
    RS PRO DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 01. s → 999h, DPST
    • RS Stock No. 896-6866
    Each
    £49.02
    RS PRO Plug In Power Relay, 240V ac Coil, 16A Switching Current, SPDT
    • RS Stock No. 121-7809
    Each
    £7.36
    Releco Plug In Power Relay, 115V ac Coil, 5A Switching Current, 4PDT
    • RS Stock No. 376-464
    • Mfr. Part No. C9-A41X / AC 115 V
    Each
    £14.55
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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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