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

17467 Products showing for Relays & Signal Conditioning

1 of 874
In Stock
Phoenix Contact PCB Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 290-1416
  • Mfr. Part No. 2961105
Subtotal (1 unit)
SGD25.84(exc. GST)
SGD25.84/unit
Limited stock
Sensata / Crydom 1-DC Series Solid State Relay, 40 A Load, Panel Mount, 200 V dc Load, 32V dc Control
  • RS Stock No. 736-0879
  • Mfr. Part No. D2D40
Subtotal (1 unit)
SGD172.52(exc. GST)
SGD172.52/unit
In Stock
Advantech ADAM Series Serial Converter, RS232 Input, RS485, RS422 Output, 10V dc, 30 V dc Supply
  • RS Stock No. 283-8001
  • Mfr. Part No. ADAM-4520
Subtotal (1 unit)
SGD165.18(exc. GST)
SGD165.18/unit
In Stock
Phoenix Contact Diode, Yellow LED, 2900939 2
  • RS Stock No. 204-7673
  • Mfr. Part No. 2900939
Subtotal (1 pack of 10 units)
SGD40.58(exc. GST)
SGD4.058/unit
In Stock
RS PRO 8 Way 300V DIN Rail Relay Socket, for use with RS PRO RKL Relays DPDT
  • RS Stock No. 121-7825
Subtotal (1 unit)
SGD8.96(exc. GST)
SGD8.96/unit
In Stock
Phoenix Contact RIF-1-BPT/2X21 2 Way 250V ac/dc DIN Rail Relay Base, for use with Miniature Power Relay
  • RS Stock No. 224-7561
  • Mfr. Part No. 2900931
Subtotal (1 pack of 10 units)
SGD70.77(exc. GST)
SGD7.077/unit
In Stock
Turck 2 Channel Galvanic Barrier, IECEx, ATEX
  • RS Stock No. 808-6510
  • Mfr. Part No. IM1-22EX-R
Subtotal (1 unit)
SGD401.90(exc. GST)
SGD401.90/unit
In Stock
Carlo Gavazzi NFC Reader, PCB
  • RS Stock No. 165-1485
  • Mfr. Part No. ACR1252U
Subtotal (1 unit)
SGD241.81(exc. GST)
SGD241.81/unit
In Stock
TE Connectivity PCB Signal Relay, 5V dc Coil, 2A, DPDT
  • RS Stock No. 718-1774
  • Mfr. Part No. 1-1462038-3
Subtotal (1 unit)
SGD5.36(exc. GST)
SGD5.36/unit
Limited stock
Better World
Schneider Electric PCB Power Relay, 60V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 179-9442
  • Mfr. Part No. RSL1AB4ND
Subtotal (1 unit)
SGD13.61(exc. GST)
SGD13.61/unit
Temporarily out of stock
Better World
Schneider Electric Harmony Relay RSL 5 Way 230V ac/dc DIN Rail Relay Socket, for use with B4ND Relays, RSL1 Relays
  • RS Stock No. 179-9447
  • Mfr. Part No. RSLZVA4
Subtotal (1 unit)
SGD26.64(exc. GST)
SGD26.64/unit
In Stock
Panasonic PCB Power Relay, 5V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 292-7086
  • Mfr. Part No. DE1AL25
Subtotal (1 unit)
SGD13.20(exc. GST)
SGD13.20/unit
In Stock
RS PRO Power Relay, 24V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 121-7806
Subtotal (1 unit)
SGD16.39(exc. GST)
SGD16.39/unit
In Stock
Phoenix Contact PLC-BSC 24V dc Rail Relay Socket
  • RS Stock No. 251-9455
  • Mfr. Part No. 2966016
Subtotal (1 unit)
SGD20.13(exc. GST)
SGD20.13/unit
In Stock
Omron P2RF 6 Way 250V ac DIN Rail Relay Socket, for use with G2R Relay
  • RS Stock No. 815-6744
  • Mfr. Part No. P2RF-05-ESS
Subtotal (1 unit)
SGD16.56(exc. GST)
SGD16.56/unit
In Stock
TE Connectivity PCB Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 135-5119
  • Mfr. Part No. RT424024 6-1393243-8
Subtotal (1 box of 20 units)
SGD71.20(exc. GST)
SGD3.56/unit
In Stock
Panasonic PhotoMOS AQY Series Solid State Relay, 0.25 A Load, PCB Mount, 40 V Load, 1.5V Control
  • RS Stock No. 699-6610
  • Mfr. Part No. AQY221R2S
Subtotal (1 unit)
SGD5.96(exc. GST)
SGD5.96/unit
In Stock
JM CONCEPT ULCOS 900 Series Universal Signal Converter, Resistance, Current, Temperature, Voltage, Thermocouple Input,
  • RS Stock No. 232-8253
  • Mfr. Part No. ULCOS900D1
Subtotal (1 unit)
SGD351.12(exc. GST)
SGD351.12/unit
In Stock
Carlo Gavazzi RF1 Series Solid State Relay, 25 A Load, Chassis Mount, 280 V ac Load, 9V Control
  • RS Stock No. 188-5263
  • Mfr. Part No. RF1A23L25
Subtotal (1 unit)
SGD56.21(exc. GST)
SGD56.21/unit
In Stock
Pilz PNOZ X3, 230V ac/dc, 24 V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 245-1854
  • Mfr. Part No. 774318
Subtotal (1 unit)
SGD697.45(exc. GST)
SGD697.45/unit
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