Over 800,000 products available

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

19101 Products showing for Relays & Signal Conditioning

1 of 956
In Stock
RS PRO Analogue Converter, Current, Voltage Input, Current, Voltage Output, 24V ac/dc Supply
  • RS Stock No. 606-326
Subtotal (1 unit)
£133.79(exc. VAT)
£133.79/unit
In Stock
PR Electronics Programming Display, Current Output, 20V, 6.5 V Supply
  • RS Stock No. 238-0641
  • Mfr. Part No. 4510
Subtotal (1 unit)
£63.84(exc. VAT)
£63.84/unit
In Stock
Broyce Control RCD Switch Earth Leakage Relay
  • RS Stock No. 511-9121
  • Mfr. Part No. ELRM44V-30 115/230VAC
Subtotal (1 unit)
£133.65(exc. VAT)
£133.65/unit
In Stock
Schneider Electric RE10R Series DIN Rail Electronic Timing Relay, 1-Contact, 24, 1 CO Switch Configuration
  • RS Stock No. 690-578
  • Mfr. Part No. RE10RCMUN
Subtotal (1 unit)
£19.27(exc. VAT)
£19.27/unit
In Stock
Pepperl + Fuchs Zener Barrier, ATEX
  • RS Stock No. 793-4275
  • Mfr. Part No. Z728
Subtotal (1 unit)
£93.05(exc. VAT)
£93.05/unit
In Stock
Eaton Zener Barrier, ATEX
  • RS Stock No. 612-5335
  • Mfr. Part No. MTL7787+/RS
Subtotal (1 unit)
£154.43(exc. VAT)
£154.43/unit
In Stock
Phoenix Contact PSR-SCP- 24DC/FSP/2X1/1X2, 24V dc Coupling Relay, 3 Safety Contacts
  • RS Stock No. 712-5260
  • Mfr. Part No. 2986960
Subtotal (1 unit)
£158.52(exc. VAT)
£158.52/unit
In Stock
RS PRO LCIS-WP-WAA Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V ac/dc Supply
  • RS Stock No. 192-3396
Subtotal (1 unit)
£149.43(exc. VAT)
£149.43/unit
In Stock
Omron Power Relay, 24V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 329-7308
  • Mfr. Part No. G2R-2-SNDI 24VDC (S)
Subtotal (1 unit)
£12.01(exc. VAT)
£12.01/unit
In Stock
Phoenix Contact DIN Rail Interface Relay, 24V dc Coil, 10mA Switching Current, SPDT
  • RS Stock No. 794-3771
  • Mfr. Part No. 2903370
Subtotal (1 unit)
£10.68(exc. VAT)
£10.68/unit
In Stock
GIC 225 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply
  • RS Stock No. 884-2458
  • Mfr. Part No. 2SC3D11CC3
Subtotal (1 unit)
£88.20(exc. VAT)
£88.20/unit
In Stock
Phoenix Contact PSR-SCP- 24UC/ESA4/3X1/1X2/B, 24V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 666-7040
  • Mfr. Part No. 2963763
Subtotal (1 unit)
£160.93(exc. VAT)
£160.93/unit
In Stock
Eaton Zener Barrier, ATEX
  • RS Stock No. 703-7056
  • Mfr. Part No. MTL5541/RS
Subtotal (1 unit)
£378.85(exc. VAT)
£378.85/unit
In Stock
GIC Monitoring Relay, 3 Phase, DPDT, DIN Rail, 415V ac
  • RS Stock No. 794-3939
  • Mfr. Part No. MG53BH
Subtotal (1 unit)
£57.16(exc. VAT)
£57.16/unit
In Stock
Finder PCB Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 457-2846
  • Mfr. Part No. 34.51.7.024.0010
Subtotal (1 unit)
£6.51(exc. VAT)
£6.51/unit
In Stock
Lovato Monitoring Relay, SPDT-CO, DIN Rail, 24V ac, 240 V ac
  • RS Stock No. 224-7400
  • Mfr. Part No. LVM25240
Subtotal (1 unit)
£88.60(exc. VAT)
£88.60/unit
In Stock
Finder Power Relay, 230V ac Coil, 7A Switching Current, 4PDT
  • RS Stock No. 385-957
  • Mfr. Part No. 55.34.8.230.0040
Subtotal (1 unit)
£13.19(exc. VAT)
£13.19/unit
In Stock
PR Electronics 4100 Series Universal Transmitter, Universal Input, Voltage, Relay, Current Output, 21.6 V ac, 253 V ac,
  • RS Stock No. 796-6884
  • Mfr. Part No. 4116
Subtotal (1 unit)
£223.30(exc. VAT)
£223.30/unit
In Stock
Phoenix Contact PCB Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 290-1416
  • Mfr. Part No. 2961105
Subtotal (1 unit)
£15.68(exc. VAT)
£15.68/unit
In Stock
ABB Monitoring Relay, 1 Phase, DPDT, DIN Rail, 24 V dc 110V ac, 130 V ac, 220 V ac, 240 V ac
  • RS Stock No. 876-5033
  • Mfr. Part No. 1SVR730712R2200 CM-MSS.33S
Subtotal (1 unit)
£79.87(exc. VAT)
£79.87/unit
1
2
3
956
Results per page

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

Related links

Be the first to know about our latest products and offers

Email address

The personal information you provide to us when signing up to this mailing list will be processed in line with the Privacy Policy