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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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    Signal Conditioners & Isolators
    Signal Conditioners & Isolators

    16343 Products showing for Relays & Signal Conditioning

    8 of 818
    ABB Timer Relay
    • RS Stock No. 746-6971
    • Mfr. Part No. 1SVR730010R3200 CT-MBS.22S
    Each
    $252.95
    Omron 8 Pin 250V ac DIN Rail Relay Socket, for use with Miniature Power Relays
    • RS Stock No. 186-4179
    • Mfr. Part No. PYFZ-08-E
    Each
    $15.45
    Siemens 3RP25 Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 1 s → 100h, DPDT
    • RS Stock No. 831-6003
    • Mfr. Part No. 3RP2505-1BW30
    Each
    $483.49
    Better World
    Schneider Electric Harmony Relay RXM 14 Pin <250V DIN Rail Relay Socket, for use with Relais Series RSZ
    • RS Stock No. 884-1326
    • Mfr. Part No. RXZE2M114M
    Each
    $17.56
    Finder DIN Rail Latching Modular Step Relay, 24V dc Coil, 16A Switching Current, SPST-NO
    • RS Stock No. 159-751
    • Mfr. Part No. 20.21.9.024.0000
    Each
    $87.55
    Finder 39 Series Interface Relay, DIN Rail Mount, 230V ac Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 819-8818
    • Mfr. Part No. 39.01.8.230.0060
    Each
    $28.40
    Finder PCB Mount Power Relay, 5V dc Coil, 6A Switching Current, SPDT
    • RS Stock No. 164-088
    • Mfr. Part No. 34.51.7.005.0010
    Each
    $14.82
    ABB DIN Rail Mount Timer Relay, 24 → 240V ac, 2-Contact, 0.05 → 600s, 1-Function, DPST
    • RS Stock No. 231-9529
    • Mfr. Part No. 1SVR500210R0100 CT-SAD.22
    Each
    $146.62
    Panasonic Plug In Automotive Relay, 12V dc Coil Voltage, 70A Switching Current, SPST
    • RS Stock No. 811-3097
    • Mfr. Part No. CB1AH-12V
    Each
    $10.16
    Lovato Level Monitoring Relay, SPDT-C/O, DIN Rail
    • RS Stock No. 224-7399
    • Mfr. Part No. LVM20A240
    Each
    $93.06
    RS PRO Plug In Power Relay, 240V ac Coil, 10A Switching Current, DPDT
    • RS Stock No. 450-0330
    Each
    $20.49
    Panasonic Solid State Relay, 1.2 A Load, PCB Mount, 600 V Load, 1.3 V Control
    • RS Stock No. 699-6525
    • Mfr. Part No. AQH3223
    Each
    $3.26
    Releco Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 376-391
    • Mfr. Part No. C7-A20X / DC 24 V
    Each
    $48.28
    Omron H3CR Series Plug In Timer Relay, 100-240/100-125V ac/dc, 2-Contact, 0.05 → 1080000s, DPDT
    • RS Stock No. 264-1622
    • Mfr. Part No. H3CR-A8 100-240VAC/100-125VDC
    Each
    $230.60
    Better World
    Schneider Electric Plug In Power Relay, 24V ac Coil, 8A Switching Current, 4PDT
    • RS Stock No. 884-1294
    • Mfr. Part No. RXM4AB1B7
    Each
    $20.74
    Siemens Phase Monitoring Relay, 3 Phase, SPDT, 160 → 690V ac, DIN Rail
    • RS Stock No. 758-6924
    • Mfr. Part No. 3UG4512-1AR20
    Each
    $381.35
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240 V ac, 24V dc, 2-Contact, 0.1 s
    • RS Stock No. 872-5801
    • Mfr. Part No. RE22R1QMU
    Each
    $99.80
    RS PRO PCB Mount Power Relay, 12V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 476-583
    Each
    $6.38
    Omron H3YN Series DIN Rail, Panel Mount Timer Relay, 200 → 230V ac, 2-Contact, 0.1 min → 10h, DPDT
    • RS Stock No. 236-1357
    • Mfr. Part No. H3YN-21 AC200-230
    Each
    $184.93
    Better World
    Schneider Electric Plug In Power Relay, 24V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 852-6831
    • Mfr. Part No. RXG12BD
    Each
    $19.46
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