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

18610 Products showing for Relays & Signal Conditioning

823 of 931
Gefran GQ Series Solid State Relay, 15 A Load, Surface Mount, 480 V ac Load, 32 V ac/dc Control
  • RS Stock No. 601-955
  • Mfr. Part No. GQ-15-48-A-1-1
Each
£51.58(exc. VAT)
Gefran GRS-H Series Solid State Relay, 90 A Load, DIN Rail Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 600-831
  • Mfr. Part No. GRS-90-48-D-3-0-0-0
Each
£105.08(exc. VAT)
Gefran GRZ-H Series Solid State Relay 3 Phase, 50 A Load, DIN Rail, Panel Mount, 600 V ac Load, 260 V ac/dc Control
  • RS Stock No. 600-664
  • Mfr. Part No. GRZ-H-3P-2S-50-60-A-2-FAN62-0
Each
£334.52(exc. VAT)
Gefran GRZ-H Series Solid State Relay, 25 A Load, DIN Rail Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 601-169
  • Mfr. Part No. GRZ-H-3P-3S-25-48-D-3-0-0
Each
£211.61(exc. VAT)
Gefran GRZ-H Series Solid State Relay 3 Phase, 40 A Load, DIN Rail, Panel Mount, 600 V ac Load, 260 V ac/dc Control
  • RS Stock No. 601-461
  • Mfr. Part No. GRZ-3P-3S-40I-60-A-2-0-0
Each
£305.13(exc. VAT)
Gefran GRS-H Series Solid State Relay, 30 A Load, DIN Rail, Panel Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 601-847
  • Mfr. Part No. GRS-30-48-D-5-0-0-0
Each
£57.37(exc. VAT)
Gefran GRP-H Series Solid State Relay, 15 A Load, DIN Rail Mount, 480 V ac Load, 530 V ac Control
  • RS Stock No. 601-335
  • Mfr. Part No. GRP-H-15-48-AN-1-0-0-1-1-0
Each
£222.69(exc. VAT)
Gefran GRZ-H Series Solid State Relay, 40 A Load, DIN Rail Mount, 480 V ac Load, 260 V ac Control
  • RS Stock No. 601-177
  • Mfr. Part No. GRZ-H-3P-3S-40-48-A-0-FAN62-0
Each
£275.72(exc. VAT)
Gefran GRS-H Series Solid State Relay, 90 A Load, DIN Rail Mount, 600 V ac Load, 260 V ac Control
  • RS Stock No. 600-944
  • Mfr. Part No. GRS-H-90-60-A-0-FAN61-0-0
Each
£183.66(exc. VAT)
Gefran GRP-H Series Solid State Relay, 120 A Load, DIN Rail Mount, 480 V ac Load, 530 V ac Control
  • RS Stock No. 601-345
  • Mfr. Part No. GRP-H-120-48-AN-0-FAN62-0-1-0-0
Each
£336.94(exc. VAT)
Sensata Crydom CW48 Series Solid State Relay, 50 A Load, Panel Mount, 660 V ac Load, 48 V dc, 280 V ac Control
  • RS Stock No. 776-1799
  • Mfr. Part No. CWU4850P
Each
£78.36(exc. VAT)
Gefran GRP-H Series Solid State Relay, 120 A Load, DIN Rail, Panel Mount, 600 V ac Load, 30 V dc Control
  • RS Stock No. 601-739
  • Mfr. Part No. GRP-H-120-60-AN-1-FAN62-0-1-0-0
Each
£388.51(exc. VAT)
Gefran GQ Series Solid State Relay, 50 A Load, Surface Mount, 240 V ac Load, 32 V ac/dc Control
  • RS Stock No. 600-902
  • Mfr. Part No. GQ-50-24-D-0-2
Each
£58.81(exc. VAT)
Gefran GRZ-H Series Solid State Relay 3 Phase, 65 A Load, DIN Rail, Panel Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 600-657
  • Mfr. Part No. GRZ-H-3P-3S-65-48-D-2-FAN63-0
Each
£402.97(exc. VAT)
Gefran GRP-H Series Solid State Relay, 15 A Load, DIN Rail Mount, 480 V ac Load, 530 V ac Control
  • RS Stock No. 601-203
  • Mfr. Part No. GRP-H-15-48-AN-1-0-0-3-1-0
Each
£269.93(exc. VAT)
Gefran GRS-H Series Solid State Relay, 30 A Load, DIN Rail Mount, 480 V ac Load, 260 V ac Control
  • RS Stock No. 600-954
  • Mfr. Part No. GRS-H-30-48-A-0-0-0-0
Each
£85.80(exc. VAT)
TE Connectivity Panel Mount Power Relay, 9/16V Coil, 300A Switching Current, SPST-NO
  • RS Stock No. 170-712
  • Mfr. Part No. 30-313-11
Each
£169.01(exc. VAT)
TE Connectivity Chassis Mount Power Relay, 18/32V Coil, 500A Switching Current, SPST-NO
  • RS Stock No. 170-709
  • Mfr. Part No. 29-511-12A
Each
£394.71(exc. VAT)
Omron PCB Mount Non-Latching Relay, 5V dc Coil, 12A Switching Current, SPST
  • RS Stock No. 232-6226
  • Mfr. Part No. G2RL-1A-E-PW1 DC5
Each
£4.52(exc. VAT)
Allen Bradley Timer Relay, 24 → 48V ac, 2-Contact
  • RS Stock No. 220-2628
  • Mfr. Part No. 700-HRS42TU24
Each
£86.37(exc. VAT)
Results per page
1
823
931

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

Related links