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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

    16126 Products showing for Relays & Signal Conditioning

    9 of 807
    Phoenix Contact PLC-OPT- 24DC/ 24DC/2/ACT Series Solid State Interface Relay, DIN Rail Mount
    • RS Stock No. 711-4711
    • Mfr. Part No. 2900376
    Each
    SGD67.04
    Finder PCB Mount Relay, 24V dc Coil, 8A Switching Current
    • RS Stock No. 249-4437
    • Mfr. Part No. 40.52.9.024.4000
    Each
    SGD12.13
    Siemens 3RP25 Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 3 → 60s, 1-Function, DPST
    • RS Stock No. 831-6075
    • Mfr. Part No. 3RP2576-1NW30
    Each
    SGD163.02
    TE Connectivity PCB Mount Power Relay, 9V dc Coil, 12A Switching Current, SPDT
    • RS Stock No. 276-3880
    • Mfr. Part No. RZ01-1C4-D009 1415899-9
    Each
    SGD4.01
    Carlo Gavazzi RGC Series Solid State Relay, 20 A Load, DIN Rail Mount, 240 V ac Load, 32 V dc Control
    • RS Stock No. 856-8535
    • Mfr. Part No. RGC1A23D15KGU
    Each
    SGD90.58
    ABB Temperature Monitoring Relay, DPDT, DIN Rail
    • RS Stock No. 876-5045
    • Mfr. Part No. 1SVR730712R1200 CM-MSS.41S
    Each
    SGD202.06
    P.M.A CI45 Series Signal Conditioner, Universal Input, Universal Output, 18 → 30 V ac, 18 → 31V dc Supply
    • RS Stock No. 607-8504
    • Mfr. Part No. CI45-113-20000-000
    Each
    SGD885.02
    Phoenix Contact PSRclassic PSR-SPP Coupling Relay, 24V ac/dc, Single Channel, 5 Safety Contacts
    • RS Stock No. 241-6129
    • Mfr. Part No. 2963970
    Each
    SGD172.63
    TE Connectivity Plug In Power Relay, 120V ac Coil, 10A Switching Current, 3PDT
    • RS Stock No. 782-1227
    • Mfr. Part No. KUP-14A15-120
    Each
    SGD40.43
    Omron G3NE Series Solid State Relay, 20 A Load, DIN Rail Mount, 264 V ac/dc Load, 24 V ac/dc Control
    • RS Stock No. 266-372
    • Mfr. Part No. G3NE-220TL-US DC24
    Each
    SGD22.50
    Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 10A Load
    • RS Stock No. 203-5191
    • Mfr. Part No. RXG12BDPV
    Each
    SGD29.36
    Phoenix Contact 3RS7002 Series Signal Conditioner, Voltage Input, Voltage Output, 19.2 → 30V dc Supply
    • RS Stock No. 532-9968
    • Mfr. Part No. 2864684
    Each
    SGD484.48
    Finder 95 8 Pin 250V ac DIN Rail Relay Socket, for use with 40/41/43 Series Relays
    • RS Stock No. 182-9948
    • Mfr. Part No. 95.95.3SPA
    Each
    SGD13.88
    Finder PCB Mount Power Relay, 24V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 351-617
    • Mfr. Part No. 40.31.7.024.0000
    Each
    SGD8.12
    Finder PCB Mount Relay, 230V ac Coil, 8A Switching Current
    • RS Stock No. 249-4434
    • Mfr. Part No. 40.52.8.230.4000
    Each
    SGD21.57
    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
    SGD25.86
    Sensata Crydom DRC Series Series Solid State Relay, 7.6 A Load, DIN Rail Mount
    • RS Stock No. 822-9350
    • Mfr. Part No. DRC3P48D400R2
    Each
    SGD100.70
    WAGO 857 Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24V dc Supply
    • RS Stock No. 180-3043
    • Mfr. Part No. 857-424
    Each
    SGD698.88
    Crouzet Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 194 → 528 V, DIN Rail
    • RS Stock No. 262-003
    • Mfr. Part No. 84873026
    Each
    SGD371.89
    Phoenix Contact DEK-OE- 24DC/24DC/100KHZ Series Solid State Relay, DIN Rail Mount
    • RS Stock No. 533-0019
    • Mfr. Part No. 2964283
    Each
    SGD106.38
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