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

853 of 859
Siemens LZS Series Coupling Relay, Plug In, 24V ac Coil, SPDT
  • RS Stock No. 255-0892
  • Mfr. Part No. LZS:RT3D4R24
Each (In a Pack of 5)
SGD49.20(exc. GST)
TE Connectivity SSR3 Series Solid State Relay 3 Phase, 10 A Load, Panel Mount, 480 V ac Load
  • RS Stock No. 223-2003
  • Mfr. Part No. 1-2345984-9
Each (In a Box of 10)
SGD112.102(exc. GST)
Finder PCB Mount Power Relay Module, 240V ac Coil, 10A Switching Current
  • RS Stock No. 248-2010
  • Mfr. Part No. 406282400000
Each (In a Pack of 50)
SGD24.164(exc. GST)
Finder PCB Mount Power Relay Module, 120V ac Coil, 10A Switching Current
  • RS Stock No. 248-2006
  • Mfr. Part No. 406281200000
Each (In a Pack of 50)
SGD19.468(exc. GST)
Finder PCB Mount, Plug In Relay, 48V dc Coil, 12A Switching Current, SPDT
  • RS Stock No. 248-1879
  • Mfr. Part No. 405190480000
Each (In a Pack of 50)
SGD11.625(exc. GST)
Phoenix Contact PSRmini PSR-MC31 0 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 2 Safety Contacts
  • RS Stock No. 201-3861
  • Mfr. Part No. 1015503
Each
SGD299.06(exc. GST)
Sensata Crydom LN Series Solid State Relay, 25 A Load, Panel Mount, 528 V ac Load
  • RS Stock No. 227-0921
  • Mfr. Part No. LND4425C
Each
SGD136.12(exc. GST)
Siemens DIN Rail Relay, 4NC
  • RS Stock No. 275-1964
  • Mfr. Part No. 7PG2144-1AE40-1CF0
Each
SGD6,317.05(exc. GST)
Phoenix Contact PSRmini PSR-PC51 0 Auxiliary Contacts Coupling Relay 24V dc, Single Channel 1 Safety Contacts
  • RS Stock No. 201-5389
  • Mfr. Part No. 2702523
Each
SGD470.99(exc. GST)
Siemens LZS Series Coupling Relay, Plug In, 24V ac Coil, SPDT
  • RS Stock No. 255-0890
  • Mfr. Part No. LZS:RT3B4R24
Each (In a Pack of 5)
SGD46.444(exc. GST)
TE Connectivity PCB Mount Monostable Relay, 5V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 240-8987
  • Mfr. Part No. 8-1419128-1
Each (In a Bag of 100)
SGD3.217(exc. GST)
Phoenix Contact PLC-OPT Series Solid State Interface Relay, DIN Rail Mount
  • RS Stock No. 212-7306
  • Mfr. Part No. 2900390
Each (In a Pack of 10)
SGD96.139(exc. GST)
Eaton DIN Rail Impulse Relay, 24V ac Coil, 16A Switching Current, DPDT
  • RS Stock No. 255-570
  • Mfr. Part No. 265543 Z-S24/WW
Each
SGD129.84(exc. GST)
Siemens 3RF2 Series Solid State Relay, 10.5 A Load, Screw Fitting, 460 V Load
  • RS Stock No. 216-4023
  • Mfr. Part No. 3RF2310-1AA14
Each
SGD152.50(exc. GST)
Sensata Crydom CL Series Solid State Relay, 10 A rms Load, Panel Mount, 280 V rms Load, 250 V rms Control
  • RS Stock No. 720-4010
  • Mfr. Part No. CL240A10
Each
SGD77.47(exc. GST)
Sensata Cynergy3 PCB Mount Reed Relay, 12V dc Coil, SPST, 20V dc Max, 0.5 A Max, 600Ω
  • RS Stock No. 712-1185
  • Mfr. Part No. SAR91203
Each
SGD49.61(exc. GST)
Omron Plug In Power Relay, 100/110V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 107-875
  • Mfr. Part No. LY3N AC100/110
Each
SGD19.97(exc. GST)
Gefran GRS-H Series Solid State Relay, 75 A Load, DIN Rail Mount, 600 V ac Load, 32 V dc Control
  • RS Stock No. 600-823
  • Mfr. Part No. GRS-75-60-D-1-0-0-0
Each
SGD287.68(exc. GST)
Finder PCB Mount Power Relay Module, 6V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 248-1941
  • Mfr. Part No. 406170060001
Each (In a Pack of 50)
SGD12.997(exc. GST)
RS PRO Plug In Timer Relay, 100 → 240V ac, 1-Contact, 99 h 59min, 1-Function, SPDT
  • RS Stock No. 179-2901
Each
SGD260.89(exc. GST)
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