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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

    15970 Products showing for Relays & Signal Conditioning

    3 of 799
    Better World
    Schneider Electric Harmony Relay Series Solid State Interface Relay, 30 V dc Control, 3.5 A Load, Screw Fitting Mount
    • RS Stock No. 203-5236
    • Mfr. Part No. SSL1D03BDPV
    Each
    SGD62.19
    Phoenix Contact MACX MCR Series Signal Conditioner, Current Input, Current Output, 9.6 → 30V dc Supply, ATEX
    • RS Stock No. 174-3473
    • Mfr. Part No. 2905628
    Each
    SGD286.95
    Finder Plug In Power Relay, 12V dc Coil, 16A Switching Current, 3PDT
    • RS Stock No. 292-8433
    • Mfr. Part No. 62.33.9.012.0040
    Each
    SGD30.56
    Finder PCB Mount Power Relay, 230V ac Coil, 8A Switching Current, DPDT
    • RS Stock No. 376-824
    • Mfr. Part No. 40.52.8.230.0000
    Each
    SGD17.16
    RS PRO 14 Pin 300V DIN Rail Relay Socket, for use with RS PRO RKE & RKF 14 Pin Relays
    • RS Stock No. 121-7802
    Each
    SGD7.88
    Turck 2 Channel Galvanic Barrier, HART Isolating Transducer, Current Input, Current Output, ATEX, IECEx
    • RS Stock No. 808-6538
    • Mfr. Part No. IM33-22EX-HI/24VDC
    Each
    SGD772.56
    Tempatron Plug In Power Relay, 12V dc Coil, 7A Switching Current, DPDT
    • RS Stock No. 348-245
    • Mfr. Part No. HSR-12VDC
    Each
    SGD54.54
    TE Connectivity Panel Mount Power Relay, 48V dc Coil, 30A Switching Current, SPST
    • RS Stock No. 276-3911
    • Mfr. Part No. T9AP1D52-48 5-1419102-8
    Each
    SGD13.23
    Finder 38 Series Interface Relay, DIN Rail Mount, 230V ac/dc Coil, SPDT, 1-Pole
    • RS Stock No. 386-4431
    • Mfr. Part No. 38.51.0.240.0060
    Each
    SGD72.32
    P.M.A CI45 Series Signal Conditioner, Universal Input, Universal Output, 90 → 260V ac Supply
    • RS Stock No. 607-8936
    • Mfr. Part No. CI45-112-00000-000
    Each
    SGD647.04
    Omron PCB Mount Force Guided Relay, 24V dc Coil Voltage, 4 Pole, 3PST, SPST
    • RS Stock No. 548-038
    • Mfr. Part No. G7SA-3A1B DC24
    Each
    SGD59.46
    Eaton 2 Channel Zener Barrier, Switch/Proximity Detector Interface, NAMUR Sensor, Switch Input, Relay Output, ATEX
    • RS Stock No. 703-7040
    • Mfr. Part No. MTL5516C/RS
    Each
    SGD635.30
    Murrelektronik Limited AMMDS Series Solid State Relay, 2 A Load, DIN Rail Mount, 35 Vdc Load
    • RS Stock No. 284-6556
    • Mfr. Part No. 50080
    Each
    SGD87.12
    ABB Insulation Monitoring Relay with DPDT Contacts, 24 → 240 V ac/dc
    • RS Stock No. 806-5935
    • Mfr. Part No. 1SVR740660R0100 CM-IWS.1P
    Each
    SGD454.48
    Hongfa Europe GMBH PCB Mount Power Relay, 24V dc Coil, 6A Switching Current, SPDT
    • RS Stock No. 923-2616
    • Mfr. Part No. HF41F-024-ZS
    Each
    SGD5.50
    TE Connectivity PCB Mount Power Relay, 12V dc Coil, 8A Switching Current, SPDT
    • RS Stock No. 680-4069
    • Mfr. Part No. RY211012
    Each
    SGD5.25
    Phoenix Contact EMG 10-REL/KSR-G 24/1-LC Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPST, 1-Pole
    • RS Stock No. 308-1282
    • Mfr. Part No. 2942108
    Each
    SGD57.29
    P.M.A CI45 Series Signal Conditioner, Universal Input, Universal Output, 18 → 30 V ac, 18 → 31V dc Supply
    • RS Stock No. 607-8504
    • Mfr. Part No. CI45-113-20000-000
    Each
    SGD859.24
    RS PRO Solid State Interface Relay, 30 Vdc Control, 100 mAdc Load, DIN Rail Mount
    • RS Stock No. 905-4277
    Each
    SGD47.56
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.3 →
    • RS Stock No. 896-8698
    • Mfr. Part No. RE22R2KMR
    Each
    SGD186.07
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