Relays & Signal Conditioning

We stock a large choice of relay 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 from trusted brands 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 is operated electronically to turn on or off current within an electric circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, the main difference is that 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 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 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's feature semiconductor switching elements, typically thyristors, triacs and diodes that transmits and energises 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.
Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17657 Products showing for Relays & Signal Conditioning

1 of 883
In Stock
RS PRO Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 1-Pole, 6A Load
  • RS stock no. 282-4463
Subtotal (1 unit)
R 224,89(exc. VAT)
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 12 A Load, DIN Rail Mount, 100 V dc Load, 32 V dc Control
  • RS stock no. 922-1972
  • Mfr. Part No. SSM1D312BD
Subtotal (1 unit)
R 1 152,28(exc. VAT)
In Stock
Radiall PCB Mount High Frequency Relay, 12V Coil, 50Ω Impedance, 18GHz Max. Coil Freq., SPDT
  • RS stock no. 721-0333
  • Mfr. Part No. R570412000
Subtotal (1 unit)
R 4 360,91(exc. VAT)
In Stock
Panasonic PCB Mount Power Relay, 12V dc Coil, 10A Switching Current, SPST
  • RS stock no. 134-7913
  • Mfr. Part No. ALQ312
Subtotal (1 unit)
R 32,87(exc. VAT)
In Stock
RS PRO DIN Rail Mount Timer Relay, 230 V ac, 24V ac/dc, 3-Contact, 0.1 → 100h, 1-Function, SPDT
  • RS stock no. 119-803
Subtotal (1 unit)
R 473,07(exc. VAT)
In Stock
RS PRO Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 1-Pole
  • RS stock no. 888-6880
Subtotal (1 pack of 5 units)
R 968,81(exc. VAT)
In Stock
GIC 225 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24 V dc Supply
  • RS stock no. 884-2458
  • Mfr. Part No. 2SC3D11CC3
Subtotal (1 unit)
R 2 169,61(exc. VAT)
In Stock
Finder 38 Series Interface Relay, DIN Rail Mount, 240V Coil, SPDT, 1-Pole, 6A Load
  • RS stock no. 494-842
  • Mfr. Part No. 38.61.0.240.4060
Subtotal (1 unit)
R 695,23(exc. VAT)
In Stock
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 10A Switching Current, SPDT
  • RS stock no. 791-7602
  • Mfr. Part No. 1-1721150-5
Subtotal (1 unit)
R 34,80(exc. VAT)
In Stock
Finder Flange Mount Power Relay, 230V ac Coil, 16A Switching Current, DPDT
  • RS stock no. 282-6682
  • Mfr. Part No. 628282304000
Subtotal (1 unit)
R 449,79(exc. VAT)
In Stock
Turck Plug In Power Relay, 125V dc Coil, 6A Switching Current, 4PDT
  • RS stock no. 842-3735
  • Mfr. Part No. C4-A40X/120-125VDC
Subtotal (1 unit)
R 1 462,29(exc. VAT)
In Stock
Finder 94 250V ac DIN Rail Relay Socket, for use with 55.32 - 55.34 Series Relays and 85.04 Series Timers
  • RS stock no. 795-0814
  • Mfr. Part No. 94.54SMA
Subtotal (1 unit)
R 318,63(exc. VAT)
In Stock
RS PRO LCIS-WP-WAA Series Signal Conditioner, Current Input, Current Output, Passive Supply
  • RS stock no. 192-3391
Subtotal (1 unit)
R 2 222,46(exc. VAT)
In Stock
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
  • RS stock no. 132-172
Subtotal (1 unit)
R 319,03(exc. VAT)
In Stock
RS PRO Earth Leakage Relay, 45 → 65Hz Frequency, Analogue Output
  • RS stock no. 603-239
Subtotal (1 unit)
R 1 750,23(exc. VAT)
In Stock
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)
Subtotal (1 unit)
R 189,98(exc. VAT)
In Stock
Finder Plug In Power Relay, 24V dc Coil, 7A Switching Current, 4PDT
  • RS stock no. 385-929
  • Mfr. Part No. 55.34.9.024.0040
Subtotal (1 unit)
R 162,07(exc. VAT)
Last RS stock
TE Connectivity PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS stock no. 782-1270
  • Mfr. Part No. RT314012F
Subtotal (1 unit)
R 89,92(exc. VAT)
In Stock
Panasonic Solid State Relay, 550 mA Load, PCB Mount, 60 V Load, 1.5 V Control
  • RS stock no. 699-6578
  • Mfr. Part No. AQY212EH
Subtotal (1 unit)
R 97,62(exc. VAT)
In Stock
Omron Plug In Power Relay, 110 → 120V ac Coil, 6A Switching Current, 4PDT
  • RS stock no. 271-1939
  • Mfr. Part No. MY4IN-GS-R AC110/120
Subtotal (1 unit)
R 253,51(exc. VAT)
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