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
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17724 Products showing for Relays & Signal Conditioning

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874 / 887
Temporarily out of stock
Crydom LN Series Solid State Relay, 25 A Load, Panel Mount, 528 V ac Load, 32V Control
  • RS Stock No. 227-0923
  • Mfr. Part No. LND4425H
Subtotal (1 unit)
MYR627.89
MYR627.89/unit
In Stock
Finder Flange Power Relay, 24V Coil, 50A Switching Current, DPDT
  • RS Stock No. 286-8590
  • Mfr. Part No. 66.82.8.024.4000
Subtotal (1 unit)
MYR114.13
MYR114.13/unit
Stocked by manufacturer
RS Better World
Phoenix Contact 2904957, 24V dc Safety Relay, 1 Safety Contacts
  • RS Stock No. 487-409
  • Mfr. Part No. 2904957
Subtotal (1 unit)
MYR750.32
MYR750.32/unit
Temporarily out of stock
WAGO 857 Series Solid State Relay, 1 A Load, DIN Rail Mount, 240 V ac/dc Load, 60V Control
  • RS Stock No. 279-4238
  • Mfr. Part No. 788-720
Subtotal (1 unit)
MYR338.25
MYR338.25/unit
In Stock
TE Connectivity Axicom IM Series Electromechanical Interface Relay, Surface, 24V dc Coil, DPDT
  • RS Stock No. 304-946P
  • Mfr. Part No. 3-1462039-7
Subtotal 1 unit (supplied on a continuous strip)
MYR36.84
MYR36.84/unit
In Stock
Crydom OneDR Series DIN Rail Timer Relay, 2-Contact, 180 to 280 V dc 180V ac, 240 V ac, 0.1 s to 100 h, 1-Function, SPST
  • RS Stock No. 144-5931
  • Mfr. Part No. DRTA24A06
Subtotal (1 unit)
MYR355.30
MYR355.30/unit
Temporarily out of stock
Weidmüller TRZ Series Interface Relay Module, DIN Rail, 5V Coil, 1 CO
  • RS Stock No. 600-279
  • Mfr. Part No. 1479920000
Subtotal (1 unit)
MYR122.06
MYR122.06/unit
Stocked by manufacturer
Finder PCB Relay, 110V ac Coil, 30A Switching Current, 2 CO
  • RS Stock No. 248-2646
  • Mfr. Part No. 662281100000
Subtotal (1 pack of 10 units)
MYR872.91
MYR87.291/unit
Temporarily out of stock
Tele Current Sensor, 1 Phase, DIN Rail, 24 to 240 V dc, 24V ac, 240 V ac
  • RS Stock No. 658-382
  • Mfr. Part No. V4LM4S30 24-240V AC/DC
Subtotal (1 unit)
MYR1,475.88
MYR1,475.88/unit
Temporarily out of stock
WAGO 857 Series Signal Conditioner, Current Input, Voltage Output, 24V dc Supply, IECEx, ATEX
  • RS Stock No. 279-2525
  • Mfr. Part No. 857-415
Subtotal (1 unit)
MYR1,146.37
MYR1,146.37/unit
Currently unavailable
Phoenix Contact DIN Rail Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 207-3338
  • Mfr. Part No. 2907054
Subtotal (1 pack of 10 units)
MYR309.07
MYR30.907/unit
Currently unavailable
TE Connectivity Panel Mount Power Relay, 12V dc Coil, 300mA Switching Current, DPDT-CO
  • RS Stock No. 796-939
  • Mfr. Part No. 5-1393144-5
Subtotal (1 tray of 20 units)
MYR3,279.41
MYR3,279.41/tray
Temporarily out of stock
Weidmüller ACT20XP Series Signal Converter, Universal Input, Universal Output, 264V ac Supply
  • RS Stock No. 287-5524
  • Mfr. Part No. 1545720000
Subtotal (1 unit)
MYR1,924.14
MYR1,924.14/unit
Stocked by manufacturer
Omron Surface Power Relay, 100V dc, 110 V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 102-699
  • Mfr. Part No. MY2IN DC100/110 (S)
Subtotal (1 unit)
MYR65.76
MYR65.76/unit
Stocked by manufacturer
Phoenix Contact PLC-RPT- 12DC/21-21AU Series Relay Module, DIN Rail, 12V dc Coil, 2PDT, 33mA
  • RS Stock No. 224-9862
  • Mfr. Part No. 2900337
Subtotal (1 pack of 10 units)
MYR1,613.20
MYR161.32/unit
Stocked by manufacturer
TE Connectivity PCB Power Relay, 18V dc Coil, 30A Switching Current, 1 NC
  • RS Stock No. 788-055
  • Mfr. Part No. 1558662-5
Subtotal (1 tube of 70 units)
MYR1,215.76
MYR1,215.76/tube
In Stock
Lovato HS1C Series Relay, 25 A Load, DIN Rail Mount, 600 V Load, 32V Control
  • RS Stock No. 805-662
  • Mfr. Part No. HS1C6HV025D024
Subtotal (1 unit)
MYR645.08
MYR645.08/unit
In Stock
TE Connectivity PCB Power Relay, 18V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 718-1991P
  • Mfr. Part No. RT314018
Subtotal 1 unit (supplied in a tube)
MYR14.89
MYR14.89/unit
Stocked by manufacturer
Gefran GRP-H Series Industrial Mount Solid State Relays, 60 A Load, DIN Rail Mount, 480 V ac Load, 30V Control
  • RS Stock No. 601-670
  • Mfr. Part No. F087617/ GRP-H-60-48-D-1-0-0-0-0-0
Subtotal (1 unit)
MYR1,698.56
MYR1,698.56/unit
Currently unavailable
TE Connectivity PCB Power Relay, 18V dc Coil, 30A Switching Current, 1 CO
  • RS Stock No. 787-866
  • Mfr. Part No. 1558670-5
Subtotal (1 tube of 100 units)
MYR1,736.81
MYR1,736.81/tube
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