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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

    16343 Products showing for Relays & Signal Conditioning

    4 of 818
    RS PRO Solid State Interface Relay, 32 V dc Control, 6 A Load, DIN Rail Mount
    • RS Stock No. 121-3888
    Each
    $90.57
    Broyce Control Voltage Monitoring Relay, SPDT, 12 → 24V dc, DIN Rail
    • RS Stock No. 850-5411
    • Mfr. Part No. LBVR/A 12-24VDC
    Each
    $96.89
    Finder 4C Series Interface Relay, DIN Rail Mount, 12V dc Coil, DPDT, 2-Pole
    • RS Stock No. 154-352
    • Mfr. Part No. 4C.02.9.012.0050SPA
    Each
    $37.82
    Finder 84 Series Series DIN Rail Mount Digital Timer, 12 → 24V ac/dc, 2-Contact, 0.1 s → 9999h, DPDT
    • RS Stock No. 123-2800
    • Mfr. Part No. 84.02.0.024.0000
    Each
    $222.40
    Carlo Gavazzi DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 0.1 s → 100h, SPDT
    • RS Stock No. 857-7539
    • Mfr. Part No. DMB51CW24
    Each
    $168.25
    Phoenix Contact DIN Rail Power Relay, 24V ac Coil, 12A Switching Current, DPDT
    • RS Stock No. 794-3727
    • Mfr. Part No. 2903333
    Each
    $23.77
    Finder 39 Series Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT
    • RS Stock No. 788-8658
    • Mfr. Part No. 39.11.0.024.0060
    Each
    $27.77
    Finder 96 8 Pin 250V ac DIN Rail Relay Socket, for use with 56.32
    • RS Stock No. 666-7980
    • Mfr. Part No. 96.02SMA
    Each
    $12.47
    Pilz PNOZsigma PNOZ s4 Emergency Stop Safety Relay, 24V dc, Dual-Channel, 3 Safety Contacts
    • RS Stock No. 156-106
    • Mfr. Part No. 750104
    Each
    $901.71
    Phoenix Contact PCB Mount Power Relay, 24V dc Coil, 6A Switching Current, SPDT
    • RS Stock No. 290-1416
    • Mfr. Part No. 2961105
    Each
    $29.25
    Finder PCB Mount Power Relay, 24V ac Coil, 8A Switching Current, DPDT
    • RS Stock No. 376-802
    • Mfr. Part No. 40.52.8.024.0000
    Each
    $15.37
    Fujitsu PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST
    • RS Stock No. 790-3325
    • Mfr. Part No. FTR-F3AA024E-HA
    Each
    $2.44
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 353-837
    • Mfr. Part No. G2R-1-SN 24VDC (S)
    Each
    $23.15
    TE Connectivity PCB Mount Force Guided Relay, 24V dc Coil Voltage, 2 Pole, DPDT
    • RS Stock No. 334-0143
    • Mfr. Part No. V23047-A1024-A501 1-1393258-5
    Each
    $21.85
    Finder 4C Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole
    • RS Stock No. 154-334
    • Mfr. Part No. 4C.01.9.024.0050SPA
    Each
    $36.28
    Omron H3DK Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.1 s → 1200h, SPDT
    • RS Stock No. 733-4956
    • Mfr. Part No. H3DK-M1 24-240VAC/DC
    Each
    $188.62
    TE Connectivity DIN Rail Power Relay, 24V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 494-0637
    • Mfr. Part No. RT4S5LC4 1415074-1
    Each
    $25.41
    Finder DIN Rail Power Relay, 12V dc Coil, 20A Switching Current, SPST-NC, SPST-NO
    • RS Stock No. 511-1177
    • Mfr. Part No. 22.23.9.012.4000
    Each
    $67.03
    Better World
    Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 V dc, 24 → 240V ac, 2-Contact, 0.1 s
    • RS Stock No. 791-2720
    • Mfr. Part No. RE17RBMU
    Each
    $118.57
    Siemens Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 160 → 690V ac, DIN Rail
    • RS Stock No. 518-7174
    • Mfr. Part No. 3UG4615-1CR20
    Each
    $654.31
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