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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

    16126 Products showing for Relays & Signal Conditioning

    1 of 807
    Eaton Phase, Voltage Monitoring Relay, 3 Phase, 300 → 500V ac, DIN Rail
    • RS Stock No. 179-3530
    • Mfr. Part No. 184764 EMR6-AW500-D-1
    Each
    SGD432.80
    WAGO Marker for use with Width 5 → 17.5 mm Terminal Block
    • RS Stock No. 135-7403
    • Mfr. Part No. 248-501
    1 Bag of 5
    SGD45.44
    RS PRO DIN Rail Mount Timer Relay, 12 → 230V ac/dc, 0.1 s → 100h, SPDT
    • RS Stock No. 102-6124
    Each
    SGD40.72
    Finder Plug In Power Relay, 24V dc Coil, 16A Switching Current, SPDT
    • RS Stock No. 534-5279
    • Mfr. Part No. 46.61.9.024.0074
    Each
    SGD14.77
    Panasonic PCB Mount Power Relay, 5V dc Coil, 5A Switching Current, SPST
    • RS Stock No. 134-7945
    • Mfr. Part No. APAN3105
    Each
    SGD6.03
    Omron G3NA Series Solid State Relay, 10 A Load, DIN Rail Mount, 240 V ac Load
    • RS Stock No. 794-8277
    • Mfr. Part No. G3NA-210B-UTU DC5-24
    Each
    SGD54.09
    Omron Temperature Monitoring Relay, SPDT
    • RS Stock No. 215-7852
    • Mfr. Part No. K8AK-TH11S 24VAC/DC
    Each
    SGD236.64
    Relpol Phase, Voltage Monitoring Relay, 3 Phase, SPDT, Maximum of 552 V, DIN Rail
    • RS Stock No. 914-3945
    • Mfr. Part No. ECPF03
    Each
    SGD64.69
    Panasonic Surface Mount Signal Relay, 24V dc Coil, 2A Switching Current, DPDT
    • RS Stock No. 815-4928
    • Mfr. Part No. TX2-24V
    Each
    SGD4.67
    Carlo Gavazzi RP1 Series Solid State Relay, 3 A Load, PCB Mount, 230 V ac Load, 32 Vdc Control
    • RS Stock No. 272-6006
    • Mfr. Part No. RP1B23D3
    Each
    SGD22.56
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.3 →
    • RS Stock No. 896-8695
    • Mfr. Part No. RE22R1KMR
    Each
    SGD155.13
    Panasonic Plug In Automotive Relay, 24V dc Coil Voltage, 15A Switching Current, SPDT
    • RS Stock No. 699-5976
    • Mfr. Part No. CM124
    Each
    SGD21.67
    Finder 4C Series Interface Relay, DIN Rail Mount, 230V ac Coil, SPDT, 1-Pole, 10A Load
    • RS Stock No. 123-2827
    • Mfr. Part No. 4C.P1.8.230.0060SPA
    Each
    SGD38.73
    Omron PCB Mount Relay, 240V ac Coil, SPST
    • RS Stock No. 243-6608
    • Mfr. Part No. G7L-1A-TUB 200/240AC
    Each
    SGD19.80
    Murrelektronik Limited Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 137-0297
    • Mfr. Part No. 51120
    Each
    SGD41.28
    Low Signal Relay, PCB, DPDT-NO, 12VDC 2A
    • RS Stock No. 206-6112
    • Mfr. Part No. V23079A2003B301 3-1393789-7
    Each
    SGD3.70
    Fujitsu Through Hole Signal Relay, 5V dc Coil, 1A Switching Current, DPDT
    • RS Stock No. 195-8103
    • Mfr. Part No. RY-5W-K
    Each
    SGD3.85
    Omron PCB Mount Power Relay, 48V dc Coil, 16A Switching Current, SPDT
    • RS Stock No. 172-0064
    • Mfr. Part No. G2R-1-E DC48
    Each
    SGD7.57
    Finder PCB Mount Power Relay, 110V ac Coil, 7A Switching Current, 4PDT
    • RS Stock No. 245-2295
    • Mfr. Part No. 55.14.8.110.0000
    Each
    SGD26.73
    TE Connectivity Flange Mount Power Relay, 12V dc Coil, 30A Switching Current, DPDT
    • RS Stock No. 235-5497
    • Mfr. Part No. T92P11D22-12 5-1393211-3
    Each
    SGD36.15
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