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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

    16126 Products showing for Relays & Signal Conditioning

    2 of 807
    RS PRO Interface Relay, DIN Rail Mount, 230V ac/dc Coil, SPDT, 1-Pole
    • RS Stock No. 888-6833
    Each (In a Pack of 5)
    SGD20.138
    Crouzet DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, SPDT
    • RS Stock No. 774-0301
    • Mfr. Part No. 88827103
    Each
    SGD164.42
    Finder 4C Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
    • RS Stock No. 154-362
    • Mfr. Part No. 4C.02.9.024.0050SPA
    Each
    SGD32.72
    Omron H3YN Series DIN Rail Mount Timer Relay, 24V dc, 2-Contact, 0.1 s → 10min
    • RS Stock No. 215-4078
    • Mfr. Part No. H3YN-2 DC24
    Each
    SGD84.51
    Eaton 1 Channel Zener Barrier, Vibration Transducer, ATEX
    • RS Stock No. 783-4037
    • Mfr. Part No. MTL5531/RS
    Each
    SGD1,040.54
    Omron G9SE Emergency Stop Safety Relay, 24V dc, Dual-Channel, 4 Safety Contacts
    • RS Stock No. 890-3382
    • Mfr. Part No. G9SE-401 DC24
    Each
    SGD280.98
    Finder 38 Series Electromechanical Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole
    • RS Stock No. 386-4419
    • Mfr. Part No. 38.51.7.024.0050
    Each
    SGD25.44
    Omron P7SA 10 Pin 24V dc DIN Rail Relay Socket, for use with G7SA Series
    • RS Stock No. 548-026
    • Mfr. Part No. P7SA-10F-ND DC24
    Each
    SGD54.59
    Weidmuller TRS Series Interface Relay, DIN Rail Mount, 24V Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 892-8789
    • Mfr. Part No. 1122770000
    Each
    SGD21.03
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 488-2610
    • Mfr. Part No. MY2 DC24(S)
    Each
    SGD16.77
    Panasonic PCB Mount Latching Power Relay, 24V dc Coil, 3A Switching Current, DPDT
    • RS Stock No. 699-6979
    • Mfr. Part No. S2-L2-DC24V
    Each
    SGD25.44
    RS PRO DIN Rail Mount Timer Relay, 24V ac, 1-Contact, 0.3 s → 30h, 1-Function, SPDT
    • RS Stock No. 896-6822
    Each
    SGD58.11
    Finder 80 Series Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 → 20 min, 0.1
    • RS Stock No. 446-0327
    • Mfr. Part No. 80.01.0.240.0000
    Each
    SGD139.86
    Elesta PCB Mount Force Guided Relay, 24V dc Coil Voltage, 4NO/2NC
    • RS Stock No. 286-1763
    • Mfr. Part No. SIR422-24VDC (H162778)
    Each
    SGD63.08
    Siemens LZS Series Coupling Relay, Plug In, 24V dc Coil, DPDT, 2-Pole
    • RS Stock No. 758-6876
    • Mfr. Part No. LZS:RT4A4L24
    Each
    SGD37.00
    EYC EYC DPT02 Series Signal Conditioner, Universal Input, Current, Voltage Output, 85 → 253V ac Supply
    • RS Stock No. 144-1337
    • Mfr. Part No. DPT02-A
    Each
    SGD244.09
    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
    SGD17.99
    Fujitsu Through Hole Signal Relay, 3V dc Coil, 1A Switching Current, SPDT
    • RS Stock No. 195-8167
    • Mfr. Part No. SY-3-K
    Each
    SGD6.14
    RS PRO DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, SPDT
    • RS Stock No. 896-6826
    Each
    SGD63.44
    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
    SGD781.88
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