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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.

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    Signal Conditioners & Isolators
    Signal Conditioners & Isolators

    15747 Products showing for Relays & Signal Conditioning

    1 / 788
    Broyce Control Phase, Voltage Monitoring Relay, 1 Phase, SPDT, DIN Rail
    • RS Stock No. 850-5395
    • Mfr. Part No. LXCVR 230V
    Each
    MYR337.44
    TE Connectivity Flange Mount Power Relay, 24V dc Coil, 30A Switching Current, DPST
    • RS Stock No. 235-5475
    • Mfr. Part No. T92P7D22-24 7-1393211-1
    Each
    MYR93.28
    Phoenix Contact PSRclassic PSR-SCP Coupling Relay, 24V dc, 1 Safety Contacts
    • RS Stock No. 241-6138
    • Mfr. Part No. 2981978
    Each
    MYR882.90
    Schneider Electric Current Monitoring Relay
    • RS Stock No. 247-1908
    • Mfr. Part No. 56193
    Each
    MYR2,024.14
    Finder PCB Mount Power Relay, 24V dc Coil, 16A Switching Current, SPDT
    • RS Stock No. 351-645
    • Mfr. Part No. 40.61.7.024.0000
    Each
    MYR33.62
    Broyce Control Voltage Monitoring Relay, SPDT, 12 → 24V dc, DIN Rail
    • RS Stock No. 850-5411
    • Mfr. Part No. LBVR/A 12-24VDC
    Each
    MYR458.31
    Durakool PCB Mount Power Relay, 12V dc Coil, 12A Switching Current, SPDT-C/O
    • RS Stock No. 276-5965
    • Mfr. Part No. DG31-3011-35-1012
    1 Tray of 25
    MYR158.19
    Dold Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
    • RS Stock No. 240-8939
    • Mfr. Part No. BA9043 3/N AC50-400HZ 230/400V
    Each
    MYR1,946.05
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 488-2610
    • Mfr. Part No. MY2 DC24(S)
    Each
    MYR49.13
    ABB Phase Monitoring Relay, 3 Phase, DPDT, 300 → 500V ac, DIN Rail
    • RS Stock No. 775-7885
    • Mfr. Part No. 1SVR730774R3300 CM-PAS.41S
    Each
    MYR1,260.82
    Dold Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
    • RS Stock No. 240-8945
    • Mfr. Part No. BA9043/001 3AC50-400Hz 400V
    Each
    MYR1,458.32
    WAGO 788 Series Interface Relay, DIN Rail Mount, 24V dc Coil, 2-Pole
    • RS Stock No. 135-7382
    • Mfr. Part No. 788-312
    Each
    MYR99.88
    Omron PCB Mount Force Guided Relay, 24V dc Coil Voltage, 6 Pole, 4PST, DPST
    • RS Stock No. 548-022
    • Mfr. Part No. G7SA-4A2B DC24 BY OMZ
    Each
    MYR249.33
    Idec PCB Mount Force Guided Relay, 24V dc Coil Voltage, 4 Pole, DPDT
    • RS Stock No. 838-2694
    • Mfr. Part No. RF1V-2A2B-D24
    Each
    MYR113.85
    GIC Phase, Voltage Monitoring Relay, 3 Phase, DPDT
    • RS Stock No. 884-2473
    • Mfr. Part No. MAC04D0100
    Each
    MYR416.10
    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. 210-4291
    • Mfr. Part No. 1SVR508110R0000 CT-AHC.12
    Each
    MYR217.02
    Dold Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
    • RS Stock No. 240-8967
    • Mfr. Part No. BD9080.12 3AC400V UH=AC230V
    Each
    MYR1,924.45
    Better World
    Schneider Electric Level Monitoring Relay, 1 Phase, SPDT, DIN Rail
    • RS Stock No. 124-0182
    • Mfr. Part No. RM22LG11MR
    Each
    MYR336.16
    Phoenix Contact PSRclassic PSR-SPP-24UC/ESAM4/3X1/1X2/B Emergency Stop Safety Relay, 24V ac/dc, Dual-Channel, 3 Safety
    • RS Stock No. 712-5254
    • Mfr. Part No. 2900510
    Each
    MYR957.14
    Dold Current Monitoring Relay, 1 Phase, DPDT, DIN Rail
    • RS Stock No. 240-9320
    • Mfr. Part No. BA9053/410 AC1A/5A/10A AC230V 0-20S
    Each
    MYR1,533.54
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