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

17174 Products showing for Relays & Signal Conditioning

857 of 859
Finder PCB Mount Force Guided Relay, 5V dc Coil Voltage, 2 Pole, DPDT
  • RS Stock No. 733-5091
  • Mfr. Part No. 50.12.9.005.5000
Each
SGD28.79(exc. GST)
Eaton Sealing Cover
  • RS Stock No. 179-3526
  • Mfr. Part No. 184760 EMR6-PH45
Each
SGD20.11(exc. GST)
Siemens Monitoring Relay, SPDT, 24 → 240V ac/dc, DIN Rail
  • RS Stock No. 175-2272
  • Mfr. Part No. 3RN2000-2AW30
Each
SGD139.14(exc. GST)
RS PRO DIN Rail Mount Timer Relay, 24 → 240V, 1-Contact, 4 → 60s, 1-Function, CO
  • RS Stock No. 558-904
Each
SGD25.75(exc. GST)
Gefran GRS-H Series Solid State Relay, 25 A Load, DIN Rail Mount, 480 V ac Load, 260 V ac Control
  • RS Stock No. 601-985
  • Mfr. Part No. GRS-H-25-48-A-0-0-0-0
Each
SGD184.16(exc. GST)
Siemens 3RF2 Series Solid State Relay, 10.5 A Load, DIN Rail Mount, 600 V Load, 24 V dc Control
  • RS Stock No. 467-4857
  • Mfr. Part No. 3RF2310-1AA06
Each
SGD233.31(exc. GST)
Finder 39 Series Solid State Interface Relay, DIN Rail Mount, 240V ac/dc Coil, SPST, 1-Pole, 6/50A Load
  • RS Stock No. 894-9398
  • Mfr. Part No. 39.30.0.240.9024
Each
SGD94.40(exc. GST)
Omron G3VM Series Solid State Relay, 2 A Load, Surface Mount, 40 V Load
  • RS Stock No. 205-1898
  • Mfr. Part No. G3VM-41DY1
Each (In a Tube of 400)
SGD3.097(exc. GST)
Phoenix Contact Monitoring Relay, 88 → 120V ac, Plug In
  • RS Stock No. 129-770
  • Mfr. Part No. 2866116
Each
SGD19.05(exc. GST)
Siemens DIN Rail Relay, 4NC
  • RS Stock No. 275-1961
  • Mfr. Part No. 7PG2144-1AE40-1CB0
Each
SGD6,317.05(exc. GST)
Finder PCB Mount Power Relay Module, 110V dc Coil, 20A Switching Current
  • RS Stock No. 248-2065
  • Mfr. Part No. 564291100000
Each (In a Pack of 10)
SGD29.775(exc. GST)
RS PRO Plug In Timer Relay, 12 → 48V dc, 1-Contact, 999.9s, 1-Function, SPDT
  • RS Stock No. 179-2912
Each
SGD165.35(exc. GST)
Omron Plug In Power Relay, 100/110V ac Coil, 7A Switching Current, DPDT
  • RS Stock No. 107-874
  • Mfr. Part No. LY2ZN-CR AC100/110
Each
SGD26.49(exc. GST)
RS PRO DIN Rail Mount Timer Relay, 195 → 253V, 1-Contact, 0.1 s → 576h, 10-Function, 2NO/1NC
  • RS Stock No. 323-893
Each
SGD192.20(exc. GST)
Finder PCB Mount Power Relay Module, 240V ac Coil, 16A Switching Current
  • RS Stock No. 248-2488
  • Mfr. Part No. 622282400300
Each (In a Pack of 10)
SGD31.207(exc. GST)
Z-TN Series Relay, DIN Rail Mount, 230V ac Coil, SPDT, 2-Pole, 20A Load
  • RS Stock No. 255-978
  • Mfr. Part No. 267975 Z-TN230/1S1O
1 Pack of 2
SGD42.59(exc. GST)
Toshiba Solid State Relay
  • RS Stock No. 799-5223
  • Mfr. Part No. TLP171A(F(O
Each (In a Pack of 2)
SGD3.48(exc. GST)
Finder PCB Mount Power Relay Module, 48V ac Coil, 20A Switching Current
  • RS Stock No. 248-2056
  • Mfr. Part No. 564280480000
Each (In a Pack of 10)
SGD29.775(exc. GST)
Siemens Relay Cover for use with 3RF29 Function Module
  • RS Stock No. 203-2099
  • Mfr. Part No. 3RF2900-0RA88
Each (In a Pack of 10)
SGD6.438(exc. GST)
Eaton Z-TN Series Relay, DIN Rail Mount, 24V ac Coil, DPST, 2-Pole, 20A Load
  • RS Stock No. 253-882
  • Mfr. Part No. 267976 Z-TN24/SS
1 Pack of 2
SGD39.00(exc. GST)
1
857
858
859
Results per page

Related links