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

18567 Products showing for Relays & Signal Conditioning

147 of 929
Eaton 3 Channel Zener Barrier, Intrinsic Safety Barrier, RTD, Thermocouple Input, ATEX
  • RS Stock No. 612-5329
  • Mfr. Part No. MTL7756AC/RS
Each
£241.09(exc. VAT)
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05 → 1s,
  • RS Stock No. 897-6728
  • Mfr. Part No. RE22R1MYMR
Each
£88.54(exc. VAT)
Broyce Control Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 266 → 540V ac, DIN Rail
  • RS Stock No. 317-615
  • Mfr. Part No. LXPRC/S/RD
Each
£70.50(exc. VAT)
Broadcom Solid State Relay, 2.5 A Load, PCB Mount, 60 V Load, 1.7 V Control
  • RS Stock No. 189-4785
  • Mfr. Part No. ASSR-1611-301E
Each (In a Tube of 50)
£4.54(exc. VAT)
Phoenix Contact PLC-OPT-230UC/ 24DC/2 Series Solid State Interface Relay, DIN Rail Mount
  • RS Stock No. 711-4718
  • Mfr. Part No. 2900368
Each
£31.03(exc. VAT)
Dold Standstill Monitoring Relay, 1, 3 Phase, 3PDT, DIN Rail
  • RS Stock No. 181-2782
  • Mfr. Part No. LH5946.48/61 20-400mV UH=DC24V 0,2-6s
Each
£652.80(exc. VAT)
TE Connectivity PCB Mount Latching Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 161-3953
  • Mfr. Part No. RT314A12
Each (In a Box of 20)
£4.378(exc. VAT)
Eaton 1 Channel Zener Barrier, Vibration Transducer, ATEX
  • RS Stock No. 783-4037
  • Mfr. Part No. MTL5531/RS
Each
£468.84(exc. VAT)
Phoenix Contact MINI MCR Series Signal Conditioner, Current, Voltage Input, Current Output, 8 → 30V dc Supply,
  • RS Stock No. 764-9649
  • Mfr. Part No. 2902829
Each
£215.07(exc. VAT)
ATC 175MU Series DIN Rail Mount Multi timer, 12 → 240 V ac/dc, 20 → 240 V ac/dc, 1-Contact, 0.3 s
  • RS Stock No. 286-788
  • Mfr. Part No. 175MU
Each
£34.38(exc. VAT)
RS PRO Solid State Relay, 10 Amps Load, Panel Mount, Surface Mount, 280 Vrms Load, 32 V dc Control
  • RS Stock No. 253-7282
Each
£19.34(exc. VAT)
PR Electronics 5100 Series Galvanic Barrier, Current, RTD, Thermocouple, Voltage Input, Current, Voltage, Relay Output,
  • RS Stock No. 796-6994
  • Mfr. Part No. 5116B
Each
£446.62(exc. VAT)
Omron PCB Mount Power Relay, 5V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 365-0579
  • Mfr. Part No. G2RL-2 DC5
Each
£4.39(exc. VAT)
ENTES MCB Series DIN Rail Mount Timer Relay, 12 → 240V ac, 1-Contact, 4 sec → 30 sec, SPDT
  • RS Stock No. 628-907
  • Mfr. Part No. MCB-60
Each
£16.42(exc. VAT)
Endress+Hauser 2 Channel Galvanic Barrier, Galvanic Barrier/Isolator, Current Input, 0/4 to 20 mA Output, SIL 2, Zone 2
  • RS Stock No. 288-6558
  • Mfr. Part No. RN22-AA3B
Each
£181.06(exc. VAT)
Better World
Schneider Electric Plug In Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 220-5151
  • Mfr. Part No. RUMC31P7
Each (In a Pack of 10)
£15.586(exc. VAT)
Panasonic Solid State Relay, 0.12 A Load, Surface Mount, 350 V Load, 5 V dc Control
  • RS Stock No. 811-3268
  • Mfr. Part No. AQW210EHA
Each
£4.54(exc. VAT)
Omron PCB Mount Signal Relay, 12V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 365-0412
  • Mfr. Part No. G6K-2G-Y DC12
Each
£3.55(exc. VAT)
Panasonic PCB Mount Power Relay, 24V dc Coil, SPDT
  • RS Stock No. 134-7958
  • Mfr. Part No. ALQ1F24
Each
£1.48(exc. VAT)
RS PRO PCB Mount Signal Relay, 5V dc Coil, 1A Switching Current
  • RS Stock No. 325-326
Each
£0.39(exc. VAT)
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Guides & Articles

Article image
Solid State Relays Guide
This complete guide looks at what solid state relays are, how they work, the various circuits and the different types that are currently available.
Read more
Article image
Latching Relays Guide
In our comprehensive guide we look at what latching relays are, what types and sizes are available, as well as the different uses of latching relays.
Read more

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