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

17728 Products showing for Relays & Signal Conditioning

38 of 887
In Stock
Panasonic Solid State Relay, 1 A Load, Surface Mount, 60 V Load, 5 V dc Control
  • RS stock no. 811-3252
  • Mfr. Part No. AQY212GS
Each
R 80.67(exc. VAT)
In Stock
ABB Plug In Power Relay, 230V ac Coil, 10A Switching Current, SPDT
  • RS stock no. 775-5145
  • Mfr. Part No. 1SVR405612R3100 CR-M230AC3L
Each
R 249.83(exc. VAT)
In Stock
Panasonic PCB Mount Latching Power Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS stock no. 134-7946
  • Mfr. Part No. ADW1212HLW
Each
R 102.85(exc. VAT)
In Stock
Omron H3CR Series DIN Rail Mount Timer Relay, 12 → 48 V dc, 24 → 48V ac, 2-Contact, 0.05 s → 300h,
  • RS stock no. 177-0086
  • Mfr. Part No. H3CR-AP AC24-48/DC12-48
Each
R 1,840.20(exc. VAT)
In Stock
Omron G3NA Series Solid State Relay, DIN Rail Mount
  • RS stock no. 794-8265
  • Mfr. Part No. G3NA-D210B-UTU DC5-24
Each
R 1,491.46(exc. VAT)
In Stock
i-Autoc Solid State Relay, 4 A Load, PCB Mount, 58 V dc Load, 30 V dc Control
  • RS stock no. 102-5533
  • Mfr. Part No. KSMD48D4-24 
Each
R 520.17(exc. VAT)
In Stock
Panasonic PCB Mount Automotive Relay, 12V dc Coil Voltage, 30A Switching Current, DPDT
  • RS stock no. 699-5733
  • Mfr. Part No. ACTP212
Each
R 170.95(exc. VAT)
Temporarily out of stock
WAGO 857 Series Signal Conditioner, Voltage Input, Current Output, 24V dc Supply
  • RS stock no. 279-2524
  • Mfr. Part No. 857-414
Each
R 3,033.59(exc. VAT)
Currently unavailable
Better World
Schneider Electric Voltage Monitoring Relay, 1 Phase, SPDT, 65 → 260V ac/dc, DIN Rail
  • RS stock no. 146-519
  • Mfr. Part No. RM17UBE15
Each
R 2,815.79(exc. VAT)
Temporarily out of stock
Phoenix Contact Current Monitoring Relay, Single Phase, DIN Rail
  • RS stock no. 120-150
  • Mfr. Part No. 2903521
Each
R 2,673.86(exc. VAT)
In Stock
RS PRO Interface Relay, DIN Rail Mount, 48V ac/dc Coil, SPDT, 1-Pole, 6A Load
  • RS stock no. 282-4474
Each
R 367.58(exc. VAT)
Temporarily out of stock
Panasonic PCB Mount Power Relay, 12V dc Coil, 5A Switching Current, SPST
  • RS stock no. 134-7874
  • Mfr. Part No. APAN3112
Each (In a Tube of 25)
R 89.285(exc. VAT)
In Stock
Phoenix Contact PSRclassic PSR-SCP Safety Relay 24V dc, Dual-Channel 2 Safety Contacts
  • RS stock no. 241-6122
  • Mfr. Part No. 2963718
Each
R 3,712.56(exc. VAT)
In Stock
Better World
Schneider Electric ABE7S16 Series Relay Module
  • RS stock no. 211-8360
  • Mfr. Part No. ABE7S16S1B2
Each
R 5,655.93(exc. VAT)
In Stock
TE Connectivity PCB Mount Signal Relay, 5V dc Coil, 2A Switching Current, DPDT
  • RS stock no. 256-0649
  • Mfr. Part No. V23079A1001B301 1393788-3
Each
R 59.22(exc. VAT)
Temporarily out of stock
Phoenix Contact MACX MCR Series Isolation Amplifier, Voltage Input, Voltage Output, 8V dc Supply
  • RS stock no. 254-4812
  • Mfr. Part No. 2865052
Each
R 4,699.08(exc. VAT)
In Stock
Sensata Crydom HS151DR Series Solid State Relay, 40 A Load, DIN Rail Mount, 660 V ac Load, 32 V Control
  • RS stock no. 703-4637
  • Mfr. Part No. HS151DR-HD6050
Each
R 2,995.60(exc. VAT)
In Stock
Omron LY 11 Pin 250V ac DIN Rail Relay Socket, for use with LY Series Relay
  • RS stock no. 827-8431
  • Mfr. Part No. PTF11A
Each
R 275.28(exc. VAT)
In Stock
Omron Plug In Relay, 24V Coil, SPDT
  • RS stock no. 288-3254
  • Mfr. Part No. G2R-1-SN-AP3 24VDC (S)
Each
R 251.53(exc. VAT)
In Stock
ABB Jokab Sentry BSR23 4 Auxiliary Contacts Expansion Module 24V dc 5 Safety Contacts
  • RS stock no. 176-0034
  • Mfr. Part No. 2TLA010041R0600 Sentry BSR23 24VDC
Each
R 2,795.76(exc. VAT)
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