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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

    15905 Products showing for Relays & Signal Conditioning

    8 of 796
    Bernstein AG SCR Two Hand Control Safety Relay, 24V ac/dc, Single Channel, 2 Safety Contacts
    • RS Stock No. 177-9022
    • Mfr. Part No. 6075111016
    Each
    SGD248.12
    Omron H3CR Series DIN Rail Mount Timer Relay, 100 → 125 V dc, 100 → 240V ac, 2-Contact, 0.05 s →
    • RS Stock No. 177-0098
    • Mfr. Part No. H3CR-AP AC100-240/DC100-125
    Each
    SGD187.22
    RS PRO Signal Conditioner, Current Input, Current Output, 9 → 30V dc Supply
    • RS Stock No. 466-2264
    Each
    SGD339.67
    PR Electronics 4100 Series Universal Transmitter, Universal Input, Relay Output, 19.2 → 300 V dc, 21.6 →
    • RS Stock No. 796-6913
    • Mfr. Part No. 4131
    Each
    SGD368.70
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 488-2610
    • Mfr. Part No. MY2 DC24(S)
    Each
    SGD16.28
    RS PRO Plug In Timer Relay, 24V dc, 2-Contact, 1 → 30s, 1-Function, DPDT
    • RS Stock No. 179-2950
    Each
    SGD61.31
    Finder Plug In Power Relay, 24V dc Coil, 7A Switching Current, 4PDT
    • RS Stock No. 385-929
    • Mfr. Part No. 55.34.9.024.0040
    Each
    SGD17.02
    Phoenix Contact DEK-OE- 24DC/24DC/100KHZ Series Solid State Relay, DIN Rail Mount
    • RS Stock No. 533-0019
    • Mfr. Part No. 2964283
    Each
    SGD106.38
    Omron H3DK Series DIN Rail Mount Timer Relay, 24-240V ac/dc, 2-Contact, 0.1 → 4320000s, SPDT
    • RS Stock No. 264-1642
    • Mfr. Part No. H3DK-S1 AC/DC24-240
    Each
    SGD66.30
    Phoenix Contact PCB Mount Power Relay, 230V ac Coil, 12A Switching Current, DPDT
    • RS Stock No. 794-3803
    • Mfr. Part No. 2903668
    Each
    SGD10.91
    Finder 83 Series Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05-10 min, 0.05-10 h, 0.05-10
    • RS Stock No. 759-6640
    • Mfr. Part No. 83.21.0.240.0000
    Each
    SGD81.76
    Weidmuller TOZ Series Solid State Interface Relay, 24 V dc Control, DIN Rail Mount
    • RS Stock No. 892-8883
    • Mfr. Part No. 1127050000
    Each
    SGD36.19
    Panasonic PhotoMOS Series Solid State Relay, 0.15 A Load, Surface Mount, 25 V Load
    • RS Stock No. 205-6900
    • Mfr. Part No. AQY221N3M
    Each
    SGD9.95
    GIC DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.1 s → 999h, SPDT
    • RS Stock No. 714-0026
    • Mfr. Part No. V0DDTS
    Each
    SGD91.70
    ABB CR Series Interface Relay, DIN Rail Mount, 110V dc Coil, SPDT, 6A Load
    • RS Stock No. 237-3135
    • Mfr. Part No. 1SVR405613R8000 CR-M110DC4
    Each
    SGD15.80
    Siemens 3RP25 Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 3 → 60s, 1-Function, DPST
    • RS Stock No. 831-6075
    • Mfr. Part No. 3RP2576-1NW30
    Each
    SGD163.02
    Relpol Plug In Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
    • RS Stock No. 805-2220
    • Mfr. Part No. R15-2013-23-5230-WTL
    Each
    SGD39.76
    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
    Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 10A Load
    • RS Stock No. 203-5191
    • Mfr. Part No. RXG12BDPV
    Each
    SGD28.50
    Phoenix Contact PLC-RSC- 12DC/21 Series Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT, 1-Pole
    • RS Stock No. 434-1311
    • Mfr. Part No. 2966906
    Each
    SGD25.47
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