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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

    16343 Products showing for Relays & Signal Conditioning

    805 of 818
    Gefran GRZ-H Series Solid State Relay, 25 A Load, DIN Rail Mount, 600 V ac Load, 32 V dc Control
    • RS Stock No. 601-889
    • Mfr. Part No. GRZ-3P-2S-25-60-D-0-0-0
    Each
    $394.59
    Allen Bradley 700-SFZY Series Solid State Relay, 3 A Load, DIN Rail, Panel Mount, 264 V ac/dc Load, 28 V ac/dc Control
    • RS Stock No. 265-729
    • Mfr. Part No. 700-SFZY3Z25
    Each
    $86.18
    Siemens Current Monitoring Relay, DIN Rail
    • RS Stock No. 275-2078
    • Mfr. Part No. 7SR1004-4KB20-2CB0
    Each
    $3,794.87
    Gefran GRZ-H Series Solid State Relay, 15 A Load, DIN Rail Mount, 480 V ac Load, 260 V ac Control
    • RS Stock No. 600-747
    • Mfr. Part No. GRZ-3P-2S-15-48-A-0-0-0
    Each
    $408.88
    Finder PCB Mount, Plug In Relay, 110V dc Coil, 10A Switching Current
    • RS Stock No. 248-2003
    • Mfr. Part No. 406271104000
    Each (In a Pack of 50)
    $24.506
    Omron PCB Mount Non-Latching Relay, 12V dc Coil, 16A Switching Current, SPST
    • RS Stock No. 492-806P
    • Mfr. Part No. G2RL-1ATP5-E 12DC
    Each (Supplied in a Tray)
    $7.54
    Finder PCB Mount Relay, 230V ac Coil, 10A Switching Current, 3PDT, 3PDT
    • RS Stock No. 248-1474
    • Mfr. Part No. 551382305000
    Each (In a Pack of 10)
    $39.529
    Solid-state relay, 230 V AC
    • RS Stock No. 600-314
    • Mfr. Part No. 1127610000
    Each
    $55.69
    Siemens 3RQ4 Series Relay, Plug In, 24V dc Coil, SPST, 1-Pole, 3A Load
    • RS Stock No. 629-436
    • Mfr. Part No. 3RQ4050-1SM50
    1 Pack of 10
    $790.19
    Omron Surface Mount Signal Relay, 24V dc Coil, 1A Switching Current, DPDT
    • RS Stock No. 205-1984
    • Mfr. Part No. G6K-2F-Y-TR DC24
    Each (On a Tape of 1800)
    $3.889
    Eaton DIN Rail Impulse Relay, 240V ac Coil, 16A Switching Current, DPDT
    • RS Stock No. 253-820
    • Mfr. Part No. 265311 Z-S240/WW
    Each
    $304.71
    Siemens 3RF2 Series Solid State Relay, 90 A Load, DIN Rail Mount, 600 V Load
    • RS Stock No. 203-2075
    • Mfr. Part No. 3RF2190-1AA45
    Each
    $333.32
    Gefran GRZ-H Series Solid State Relay, 65 A Load, DIN Rail Mount, 600 V ac Load, 32 V dc Control
    • RS Stock No. 601-295
    • Mfr. Part No. GRZ-H-3P-3S-65-60-D-2-FAN62-0
    Each
    $1,210.92
    Siemens 3RQ4 Series Relay, Plug In, 24V ac/dc Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 629-463
    • Mfr. Part No. 3RQ4118-2AB00
    1 Pack of 10
    $401.24
    Relay module, 24 V AC,
    • RS Stock No. 577-818
    • Mfr. Part No. 8881620000
    Each
    $23.39
    Solid-state relay, 24…230 V
    • RS Stock No. 600-271
    • Mfr. Part No. 1127670000
    Each
    $69.57
    Siemens DIN Rail Relay, SPST
    • RS Stock No. 275-1976
    • Mfr. Part No. 7PG2154-1BA10-2HA0
    Each
    $4,815.03
    Gefran GRS-H Series Solid State Relay, 75 A Load, DIN Rail Mount, 600 V ac Load, 260 V ac Control
    • RS Stock No. 600-920
    • Mfr. Part No. GRS-75-60-A-5-0-0-0
    Each
    $386.01
    Finder PCB Mount Power Relay, 12V Coil, 10A Switching Current, SPDT
    • RS Stock No. 494-881
    • Mfr. Part No. 40.31.9.012.0000
    Each
    $5.58
    Phoenix Contact 230V ac Plug In Relay Socket, for use with Relay Connectors
    • RS Stock No. 567-393
    • Mfr. Part No. 2826525
    Each
    $146.60
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