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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

    15641 Products showing for Relays & Signal Conditioning

    7 of 783
    TE Connectivity PCB Mount Latching Power Relay, 24V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 680-3899
    • Mfr. Part No. RT424F24
    Each
    SGD9.94
    Lovato DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 0.1 s → 100days, SPDT
    • RS Stock No. 905-3479
    • Mfr. Part No. TMPL
    Each
    SGD211.50
    Bernstein AG SCR Two Hand Control Safety Relay, 24V ac/dc, Single Channel, 3 Safety Contacts
    • RS Stock No. 177-9023
    • Mfr. Part No. 6075111018
    Each
    SGD333.87
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 828-7328
    • Mfr. Part No. LY2N DC24
    Each
    SGD23.13
    WAGO 857 Series Interface Relay, DIN Rail Mount, 24V dc Coil, 1-Pole
    • RS Stock No. 135-7375
    • Mfr. Part No. 857-304
    Each
    SGD41.06
    ABB CR Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 6A Load
    • RS Stock No. 237-3140
    • Mfr. Part No. 1SVR405614R1100 CR-M024DC4LD
    Each
    SGD19.53
    Pilz PNOZ X PNOZ X7 Emergency Stop Safety Relay, 24V ac/dc, Single Channel, 2 Safety Contacts
    • RS Stock No. 324-7274
    • Mfr. Part No. 774059
    Each
    SGD281.70
    Omron Plug In Power Relay, 12V dc Coil, 5A Switching Current, DPDT
    • RS Stock No. 353-871
    • Mfr. Part No. G2R-2-SN DC12(S)
    Each
    SGD14.59
    Omron G3VM Series Solid State Relay, 4.5 A, 9 A Load, Surface Mount, 30 V Load
    • RS Stock No. 237-9908
    • Mfr. Part No. G3VM-31HR1(TR05)
    Each
    SGD11.48
    Phoenix Contact PSRclassic PSR-SCP- 24UC/THC4/2X1/1X2 Two Hand Control Safety Relay, 24V ac/dc, Dual-Channel, 2 Safety
    • RS Stock No. 666-7050
    • Mfr. Part No. 2963721
    Each
    SGD420.41
    Omron Plug In Power Relay, 24V dc Coil, 5A Switching Current, 3PDT
    • RS Stock No. 827-8282
    • Mfr. Part No. MY3N DC24
    Each
    SGD20.88
    Better World
    Schneider Electric Phase Monitoring Relay, 3 Phase, DPDT, 183 → 484 V, DIN Rail
    • RS Stock No. 146-238
    • Mfr. Part No. RM17TG20
    Each
    SGD212.55
    Phoenix Contact PLC-RSC- 24DC/21-21 Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
    • RS Stock No. 434-1327
    • Mfr. Part No. 2967060
    Each
    SGD35.16
    Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, Voltage Output, 30V dc Supply
    • RS Stock No. 489-2926
    • Mfr. Part No. 2864134
    Each
    SGD78.28
    TE Connectivity PCB Mount Power Relay, 12V dc Coil, 30A Switching Current, SPST
    • RS Stock No. 683-1412
    • Mfr. Part No. T9AS1D12-12
    Each
    SGD6.33
    Phoenix Contact PSRclassic PSR-SCP Coupling Relay, 24V dc, 3 Safety Contacts
    • RS Stock No. 712-5263
    • Mfr. Part No. 2986575
    Each
    SGD259.36
    Finder PCB Mount Power Relay, 24V dc Coil, 50A Switching Current, 3P-NO
    • RS Stock No. 800-2833
    • Mfr. Part No. 67.23.9.024.4300
    Each
    SGD66.16
    Phoenix Contact PCB Mount Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
    • RS Stock No. 794-3800
    • Mfr. Part No. 2903670
    Each
    SGD14.61
    Omron PCB Mount Power Relay, 12V dc Coil, 15A Switching Current, DPST
    • RS Stock No. 686-7165
    • Mfr. Part No. G4W-2214P-US-HP 12DC
    Each
    SGD21.88
    Better World
    Schneider Electric Harmony Control Series Panel Mount Relay Heatsink for Use with Panel Mount Solid State Relay
    • RS Stock No. 922-2127
    • Mfr. Part No. SSRHP25
    Each
    SGD49.43
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