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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

    16343 Products showing for Relays & Signal Conditioning

    7 of 818
    Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, Voltage Output, 30V dc Supply
    • RS Stock No. 489-2926
    • Mfr. Part No. 2864134
    Each
    $82.66
    Finder 97 5 Pin 250V ac DIN Rail Relay Socket, for use with 46.61 and 46.52 Series Relay
    • RS Stock No. 534-9007
    • Mfr. Part No. 97.01SPA
    Each
    $12.47
    Omron PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST
    • RS Stock No. 683-9346
    • Mfr. Part No. G6B-1114P-US 24DC
    Each
    $8.00
    ABB CT-C Series DIN Rail, Snap-On Timer Relay, 24 → 240V ac, 1-Contact, 0.05 s - 100h, 1-Function, SPDT
    • RS Stock No. 210-4289
    • Mfr. Part No. 1SVR508100R0000
    Each
    $61.75
    Omron P7SA 14 Pin 24V dc DIN Rail Relay Socket, for use with G7SA Series
    • RS Stock No. 548-016
    • Mfr. Part No. P7SA-14F-ND 24VDC
    Each
    $87.16
    Relpol Plug In Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
    • RS Stock No. 123-2076
    • Mfr. Part No. R4N-2014-23-1024-WTL
    Each
    $14.77
    RS PRO Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 282-4463
    Each
    $19.68
    Omron Plug In Power Relay, 24V ac Coil, 10A Switching Current, SPDT
    • RS Stock No. 353-843
    • Mfr. Part No. G2R-1-SN 24VAC (S)
    Each
    $32.82
    Omron Plug In Power Relay, 240V ac Coil, 10A Switching Current, 4PDT
    • RS Stock No. 827-7889
    • Mfr. Part No. LY4N 240VAC
    Each
    $67.21
    RS PRO Phase Monitoring Relay, 3 Phase, SPDT, Phase Loss, Voltage Assemmetry, DIN Rail
    • RS Stock No. 223-7795
    Each
    $130.40
    RS PRO Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 1-Pole
    • RS Stock No. 888-6880
    Each (In a Pack of 5)
    $20.784
    Releco Plug In Latching Power Relay, 24V dc Coil, 5A Switching Current, DPDT
    • RS Stock No. 213-0793
    • Mfr. Part No. C9-R21N
    Each
    $118.75
    Finder 94 8 Pin 250V ac DIN Rail Relay Socket, for use with 55.32
    • RS Stock No. 666-7959
    • Mfr. Part No. 94.02SMA
    Each
    $16.45
    Finder 39 Series Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT
    • RS Stock No. 788-8680
    • Mfr. Part No. 39.41.0.024.5060
    Each
    $23.06
    RS PRO Plug In Power Relay, 12V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 450-0318
    Each
    $20.21
    RS PRO PCB Mount Power Relay, 24V dc Coil, 20A Switching Current, SPDT
    • RS Stock No. 800-4508
    Each
    $8.52
    Better World
    Schneider Electric DIN Rail Power Relay, 12V dc Coil, 30A Switching Current, DPST
    • RS Stock No. 124-0197
    • Mfr. Part No. RPF2AJD
    Each
    $35.90
    Finder Plug In Power Relay, 12V dc Coil, 7A Switching Current, 4PDT
    • RS Stock No. 776-1660
    • Mfr. Part No. 55.34.9.012.0074
    Each
    $27.16
    PR Electronics 4100 Series Universal Transmitter, Universal Input, Current, Voltage, Relay Output, 19.2 → 300 V
    • RS Stock No. 796-6884
    • Mfr. Part No. 4116
    Each
    $619.79
    Sensata Crydom 8413 Series Solid State Relay, 10 A dc Load, Panel Mount, 60 V dc Load, 32 V dc Control
    • RS Stock No. 145-0544
    • Mfr. Part No. 84137750
    Each
    $116.31
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