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

852 of 859
In Stock
RS PRO Plug In Timer Relay, 110V ac, 4-Contact, 0.5 → 10min, 1-Function, 4PDT
  • RS Stock No. 179-2975
Each
SGD65.03(exc. GST)
Being discontinued
Sensata Cynergy3 PCB Mount Reed Relay, 24V dc Coil, SPST, 1000V Max, 3 A Max, 780Ω
  • RS Stock No. 124-5107
  • Mfr. Part No. DAR72410FU/RS
Each
SGD98.67(exc. GST)
Temporarily out of stock
Finder Plug In Relay, 24V dc Coil, 10A Switching Current
  • RS Stock No. 248-1548
  • Mfr. Part No. 553290245074
Each (In a Pack of 10)
SGD25.69(exc. GST)
Temporarily out of stock
Finder PCB Mount Power Relay Module, 6V dc Coil, 20A Switching Current
  • RS Stock No. 248-2075
  • Mfr. Part No. 564490060000
Each (In a Pack of 10)
SGD46.437(exc. GST)
In Stock
Siemens 3RF2 Series Solid State Relay, 230 V Load
  • RS Stock No. 211-4911
  • Mfr. Part No. 3RF2020-1AA42
Each
SGD89.71(exc. GST)
Temporarily out of stock
Siemens LZS Series Coupling Relay, Plug In, 115V ac Coil, SPDT
  • RS Stock No. 255-0891
  • Mfr. Part No. LZS:RT3B4S15
Each (In a Pack of 5)
SGD54.178(exc. GST)
Temporarily out of stock
Sensata Crydom PM67 Series Solid State Relay, 25 A Load, Panel Mount, 600 V ac Load
  • RS Stock No. 227-0962
  • Mfr. Part No. PM6760D25RPH
Each
SGD406.25(exc. GST)
In Stock
Sensata Crydom 8413 Series Solid State Relay, 50 A rms Load, Panel Mount, 280 V ac Load, 32 V dc Control
  • RS Stock No. 145-0537
  • Mfr. Part No. 84137020
Each
SGD117.97(exc. GST)
Currently unavailable
TE Connectivity SSRMP Series Solid State Relay, 25 A Load, Panel Mount, 480 V Load
  • RS Stock No. 204-7653
  • Mfr. Part No. SSRMP-480D25R
Each
SGD45.28(exc. GST)
In Stock
Celduc SP-ST-SL Series Solid State Relay, 2 A Load, PCB Mount, 275 V ac Load, 30V ac/dc Control
  • RS Stock No. 334-0238
  • Mfr. Part No. STA07220
Each
SGD52.70(exc. GST)
Temporarily out of stock
Omron PCB Mount Power Relay, 5V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 183-7507
  • Mfr. Part No. G6DN-1A-SL DC5
Each (In a Pack of 100)
SGD3.40(exc. GST)
Temporarily out of stock
Gefran GQ Series Solid State Relay, 50 A Load, Surface Mount, 240 V ac Load, 32 V ac/dc Control
  • RS Stock No. 600-877
  • Mfr. Part No. GQ-50-24-D-0-1
Each
SGD139.63(exc. GST)
In Stock
TE Connectivity PCB Mount Power Relay, 48V dc Coil, 12A Switching Current, SPDT
  • RS Stock No. 164-0184
  • Mfr. Part No. RTB14048
Each (In a Box of 500)
SGD5.579(exc. GST)
Temporarily out of stock
TE Connectivity SSR3 Series Solid State Relay 3 Phase, 10 A Load, Panel Mount, 480 V rms Load
  • RS Stock No. 248-6829
  • Mfr. Part No. SSR3TR-480D10R
Each
SGD181.92(exc. GST)
In Stock
Sensata Crydom DR67 Series Solid State Relay, 60 A Load, DIN Rail Mount, 600 V ac Load
  • RS Stock No. 227-0901
  • Mfr. Part No. DR6760D60P
Each
SGD629.85(exc. GST)
Temporarily out of stock
Omron G3VM Series Solid State Relay, 2 A Load, PCB Mount, 40 V Load
  • RS Stock No. 205-1896
  • Mfr. Part No. G3VM-41AY1
Each (In a Tube of 400)
SGD3.267(exc. GST)
In Stock
Broadcom ASSR Series Solid State Relay, -10 mA Load, Surface Mount, 1000 V Load
  • RS Stock No. 230-5348
  • Mfr. Part No. ASSR-601J-000E
Each
SGD9.55(exc. GST)
Temporarily out of stock
Omron G9SA 1 Auxiliary Contacts Expansion Module
  • RS Stock No. 214-6819
  • Mfr. Part No. G9SA-EX031-T075
Each
SGD398.31(exc. GST)
Temporarily out of stock
Panasonic PCB Mount Automotive Relay, 12V dc Coil Voltage, 20A Switching Current, SPST
  • RS Stock No. 173-8931
  • Mfr. Part No. CP1AHN12
Each (In a Tube of 40)
SGD5.042(exc. GST)
Temporarily out of stock
Phoenix Contact PSRmini PSR-PC52 1 Auxiliary Contacts Coupling Relay 24V dc, Single Channel 1 Safety Contacts
  • RS Stock No. 207-2656
  • Mfr. Part No. 1017064
Each
SGD502.58(exc. GST)
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