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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

    15848 Products showing for Relays & Signal Conditioning

    1 of 793
    Phoenix Contact PSRclassic PSR-SCP Emergency Stop Safety Relay, 24V ac/dc, Single/Dual-Channel, 8 Safety Contacts
    • RS Stock No. 666-7038
    • Mfr. Part No. 2963912
    Each
    $921.89
    Finder 94 14 Pin 250V ac DIN Rail, Panel Mount Relay Socket, for use with 55.34 Series Relay
    • RS Stock No. 189-3263
    • Mfr. Part No. 94.74SMA
    Each
    $20.02
    ABB R600 Series Interface Relay, DIN Rail Mount, 5V dc Coil, SPDT, 6A Load
    • RS Stock No. 669-9974
    • Mfr. Part No. 1SNA645034R2300 RB121P-5VDC
    Each
    $68.05
    RS PRO DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, CO
    • RS Stock No. 896-6813
    Each
    $68.22
    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
    $875.45
    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
    $35.98
    Phoenix Contact PSRclassic PSR-SCP Emergency Stop Safety Relay, 24V ac/dc, Single/Dual-Channel, 3 Safety Contacts
    • RS Stock No. 712-5250
    • Mfr. Part No. 2900509
    Each
    $342.34
    Finder 97 8 Pin 250V ac DIN Rail Relay Socket, for use with 46.52 Series Relay
    • RS Stock No. 534-8868
    • Mfr. Part No. 97.02SPA
    Each
    $14.45
    TE Connectivity Plug In Power Relay, 240V ac Coil, 30A Switching Current, DPST
    • RS Stock No. 235-5481
    • Mfr. Part No. T92P7A22-240 6-1393211-2
    Each
    $43.22
    Broyce Control DIN Rail Mount Timer Relay, 24 → 230 V ac/12 → 230V dc, 2-Contact, 0.1 s → 100h,
    • RS Stock No. 828-5151
    • Mfr. Part No. LMMT/2 12-230V AC/DC
    Each
    $83.72
    Finder Plug In Power Relay, 230V ac Coil, 10A Switching Current, DPDT
    • RS Stock No. 189-3190
    • Mfr. Part No. 55.32.8.230.0040
    Each
    $22.50
    ABB Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail
    • RS Stock No. 775-7936
    • Mfr. Part No. 1SVR730824R9300 CM-PFS.S
    Each
    $254.31
    Idec Plug In Power Relay, 24V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 220-6148
    • Mfr. Part No. RJ2S-CLD-D24
    Each
    $23.96
    Broyce Control DIN Rail Mount Timer Relay, 24 → 230 V ac/12 → 230V dc, 1-Contact, 0.1 s → 100h,
    • RS Stock No. 828-5158
    • Mfr. Part No. LMMT 12-230V AC/DC
    Each
    $73.39
    Finder Plug In Power Relay, 24V dc Coil, 16A Switching Current, SPDT
    • RS Stock No. 534-5279
    • Mfr. Part No. 46.61.9.024.0074
    Each
    $21.39
    Releco Plug In Power Relay, 24V ac/dc Coil, 10A Switching Current, SPDT
    • RS Stock No. 341-5168
    • Mfr. Part No. C10-A10BX / AD 24 V
    Each
    $33.82
    Relpol Plug In Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
    • RS Stock No. 123-2076
    • Mfr. Part No. R4N-2014-23-1024-WTL
    Each
    $14.77
    Finder PCB Mount Relay, 24V dc Coil, 6A Switching Current, SPDT
    • RS Stock No. 457-2846
    • Mfr. Part No. 34.51.7.024.0010
    Each
    $12.04
    Finder Plug In Power Relay, 12V dc Coil, 7A Switching Current, 4PDT
    • RS Stock No. 776-1660
    • Mfr. Part No. 55.34.9.012.0074
    Each
    $25.83
    Omron LY 8 Pin 2000V DIN Rail Relay Socket, for use with LY Series Bi-polar Relay
    • RS Stock No. 235-5440
    • Mfr. Part No. PTFZ-08-E
    Each
    $15.12
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