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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

19112 Products showing for Relays & Signal Conditioning

1 of 956
In Stock
Crydom Solid State Relay, 100 A Load, Panel Mount, 48 V dc Load, 32V dc Control
  • RS Stock No. 756-9519
  • Mfr. Part No. DC60D100
Subtotal (1 unit)
£144.79(exc. VAT)
£144.79/unit
In Stock
TE Connectivity PCB Power Relay, 12V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 334-0014
  • Mfr. Part No. PT570012 8-1419111-0
Subtotal (1 unit)
£6.75(exc. VAT)
£6.75/unit
In Stock
RS PRO BD Series Signal Conditioner, Current Input, Current Output, 115V ac, 230 V ac Supply
  • RS Stock No. 466-2393
Subtotal (1 unit)
£190.39(exc. VAT)
£190.39/unit
In Stock
Finder 48 Series Interface Relay, DIN Rail, 24V dc Coil, DPDT, 22.2mA
  • RS Stock No. 623-7157
  • Mfr. Part No. 48.52.7.024.0050SPA
Subtotal (1 unit)
£18.48(exc. VAT)
£18.48/unit
Being discontinued
Infineon PVT412 Series Solid State Relay, 210 A Load, PCB Mount, 400 V Load
  • RS Stock No. 218-6327P
  • Mfr. Part No. PVT412S-TPBF
Subtotal 5 units (supplied on a continuous strip)
£22.64(exc. VAT)
£4.528/unit
In Stock
Celduc SO8 Series Solid State Relay, 60 A Load, DIN Rail Mount, 510 Vrms Load, 32V Control
  • RS Stock No. 499-0632
  • Mfr. Part No. SO865070
Subtotal (1 unit)
£46.17(exc. VAT)
£46.17/unit
In Stock
Carlo Gavazzi Monitoring Relay, 3 Phase, 177 to 760 VAC Monitor Range, SPDT, DIN Rail, 208V ac, 690 V ac
  • RS Stock No. 857-7416
  • Mfr. Part No. PPA01CM44
Subtotal (1 unit)
£93.04(exc. VAT)
£93.04/unit
In Stock
Allen Bradley, 24V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 447-5688
  • Mfr. Part No. 440R-N23132
Subtotal (1 unit)
£214.16(exc. VAT)
£214.16/unit
In Stock
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail, 24V dc Coil, DPDT
  • RS Stock No. 203-5194
  • Mfr. Part No. RXG22BDPV
Subtotal (1 unit)
£21.49(exc. VAT)
£21.49/unit
In Stock
Omron Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 536-906
  • Mfr. Part No. MKS3PI-5 230VAC
Subtotal (1 unit)
£12.72(exc. VAT)
£12.72/unit
In Stock
Siemens DIN Rail Relay, 110V dc Coil, 16A Switching Current, DPDT
  • RS Stock No. 236-8439
  • Mfr. Part No. 5TT4217-1
Subtotal (1 unit)
£96.53(exc. VAT)
£96.53/unit
In Stock
Schneider Electric Harmony Time Series DIN Rail Timer Relay, 2-Contact, 24 V dc 24V ac, 240 V ac, 0.1 s to 100 h,
  • RS Stock No. 791-2711
  • Mfr. Part No. RE17RAMU
Subtotal (1 unit)
£39.35(exc. VAT)
£39.35/unit
In Stock
Pilz PNOZ s4, 24V dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 156-106
  • Mfr. Part No. 750104
Subtotal (1 unit)
£211.66(exc. VAT)
£211.66/unit
In Stock
PR Electronics 3100 Series Isolating Signal Converter, Current Input, Current Output, 16.8V dc, 31.2 V dc Supply, ATEX
  • RS Stock No. 796-7082
  • Mfr. Part No. 3108
Subtotal (1 unit)
£181.50(exc. VAT)
£181.50/unit
In Stock
Finder 97 8 Way 250V ac DIN Rail Relay Socket, for use with 46.52 Series Relay
  • RS Stock No. 534-8868
  • Mfr. Part No. 97.02SPA
Subtotal (1 unit)
£6.99(exc. VAT)
£6.99/unit
In Stock
Pilz PNOZ s3, 24V dc Safety Relay, 2 Safety Contacts, 1
  • RS Stock No. 156-083
  • Mfr. Part No. 750103
Subtotal (1 unit)
£163.12(exc. VAT)
£163.12/unit
In Stock
WAGO 788 Series Interface Relay, DIN Rail, 24V dc Coil, DPDT, 19mA
  • RS Stock No. 135-7382
  • Mfr. Part No. 788-312
Subtotal (1 unit)
£8.47(exc. VAT)
£8.47/unit
In Stock
Schneider Electric Temperature Monitoring Relays, 3 Phase, 2 NO, DIN Rail, 264 V dc 264V ac
  • RS Stock No. 655-203
  • Mfr. Part No. RM35TM50MW
Subtotal (1 unit)
£186.91(exc. VAT)
£186.91/unit
In Stock
Phoenix Contact Galvanic Barrier, Digital, ATEX
  • RS Stock No. 751-1320
  • Mfr. Part No. 2865450
Subtotal (1 unit)
£135.85(exc. VAT)
£135.85/unit
In Stock
Schneider Electric Preventa, 24V ac/dc Safety Relay, 3 Safety Contacts, 4
  • RS Stock No. 200-6133
  • Mfr. Part No. XPSUAF13AP
Subtotal (1 unit)
£207.91(exc. VAT)
£207.91/unit
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Guides & Articles

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
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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