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

26 of 859
In Stock
Finder 84 Series Series DIN Rail Mount Timer Relay, 110 → 240V ac/dc, 2-Contact, 0.1 s → 9999h, DPDT
  • RS Stock No. 123-2801
  • Mfr. Part No. 84.02.0.230.0000
Each
SGD225.71(exc. GST)
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac, 0.1 s → 100h,
  • RS Stock No. 791-2701
  • Mfr. Part No. RE17LCBM
Each
SGD106.15(exc. GST)
In Stock
GIC HM36 Series Series DIN Rail Mount Timer Relay, 90 → 264 V ac, 270 → 460 V ac, 1 → 10h
  • RS Stock No. 597-209
  • Mfr. Part No. 30A6B1
Each
SGD27.37(exc. GST)
In Stock
RS PRO Plug In Power Relay, 110V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 121-7831
Each
SGD13.58(exc. GST)
In Stock
Finder 34 Series Solid State Relay, 6 A Load, PCB Mount, 24 V dc Load, 30 V Control
  • RS Stock No. 457-2868
  • Mfr. Part No. 34.81.7.024.9024
Each
SGD35.39(exc. GST)
In Stock
Socomec Earth Leakage Relay, 47 → 63Hz Frequency, 0.03 mA Leakage, 2 Output
  • RS Stock No. 187-9918
  • Mfr. Part No. 49413602
Each
SGD624.87(exc. GST)
In Stock
Finder Plug In Power Relay, 230V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 350-664
  • Mfr. Part No. 60.12.8.230.0040
Each
SGD26.47(exc. GST)
Temporarily out of stock
WAGO 857 Series Relay Module, DIN Rail Mount, 24 → 230V ac/dc Coil, SPDT, 1-Pole, 6A Load
  • RS Stock No. 279-2522
  • Mfr. Part No. 857-369
Each
SGD55.42(exc. GST)
In Stock
Dold Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
  • RS Stock No. 291-3150
  • Mfr. Part No. IL9079.12/002 3AC230/400V 0.55-1.05UN 0.2-2S
Each
SGD466.41(exc. GST)
In Stock
Murrelektronik Limited Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole, 6A Load
  • RS Stock No. 137-0307
  • Mfr. Part No. 52002
Each
SGD29.28(exc. GST)
In Stock
Dold Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS Stock No. 358-6901
  • Mfr. Part No. IK9271.11 AC220-240V 0.1-15A Tv=0.1-20S
Each
SGD315.46(exc. GST)
In Stock
ABB R600 Series Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 6A Load
  • RS Stock No. 231-9462
  • Mfr. Part No. 1SNA645505R0100 RBR121A 24V/1MA TO 6A-2
Each
SGD32.30(exc. GST)
Temporarily out of stock
TE Connectivity SSR3 Series Solid State Relay 3 Phase, 40 A Load, Panel Mount, 480 V rms Load
  • RS Stock No. 248-6832
  • Mfr. Part No. SSR3TR-480D40
Each
SGD211.28(exc. GST)
Temporarily out of stock
Siemens Residual Current Monitoring Relay, Single Phase, 24 to 240V (Volts), Chassis Mount
  • RS Stock No. 648-119
  • Mfr. Part No. 5SV8223-4MR
Each
SGD3,314.85(exc. GST)
In Stock
PR Electronics 5 Series Signal Conditioner
  • RS Stock No. 796-6881
  • Mfr. Part No. 5116A
Each
SGD792.45(exc. GST)
Temporarily out of stock
Phoenix Contact Temperature Monitoring Relay, DPDT, DIN Rail
  • RS Stock No. 509-882
  • Mfr. Part No. 1336527
Each
SGD178.17(exc. GST)
In Stock
RS PRO Panel Mount Timer Relay, 12 → 48 V dc, 24 → 48V ac, 2-Contact, 0.1 s → 300h, DPDT
  • RS Stock No. 179-2916
Each
SGD126.18(exc. GST)
In Stock
Phoenix Contact OPT-24DC/230AC/ 1 Series Solid State Relay, Through Hole
  • RS Stock No. 801-7781
  • Mfr. Part No. 2967950
Each
SGD76.40(exc. GST)
In Stock
Omron Surface Mount Power Relay, 12 Vdc Coil, 5A Switching Current, DPDT
  • RS Stock No. 192-502
  • Mfr. Part No. MY2Z DC12
Each
SGD19.58(exc. GST)
In Stock
ABB DIN Rail Mount Timer Relay, 24 → 240 V ac, 24 → 48V dc, 2-Contact, 0.05 s → 300h, DPDT
  • RS Stock No. 746-7040
  • Mfr. Part No. 1SVR740010R3200 CT-MBS.22P
Each
SGD206.42(exc. GST)
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