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

17177 Products showing for Relays & Signal Conditioning

1 / 859
In Stock
RS PRO Power Relay, 24V ac Coil, 10A Switching Current, DPDT
  • RS Stock No. 121-7812
Subtotal (1 unit)
MYR43.98
MYR43.98/unit
Limited stock
Sensata / Crydom 1 Series Solid State Relay, 10 A Load, Panel Mount, 280 V dc Load, 32V dc Control
  • RS Stock No. 145-0574
  • Mfr. Part No. D2410K
Subtotal (1 unit)
MYR242.79
MYR242.79/unit
In Stock
Better World
Schneider Electric Harmony Analog Series Analogue Converter, Current/Voltage Input, Current/Voltage Output, 24V Supply,
  • RS Stock No. 221-2854
  • Mfr. Part No. RMCN22BD
Subtotal (1 unit)
MYR640.60
MYR640.60/unit
In Stock
Sensata / Crydom HD48 Series Solid State Relay, 125 A Load, Panel Mount, 530 V ac Load, 32V Control
  • RS Stock No. 244-9097
  • Mfr. Part No. HD48125
Subtotal (1 unit)
MYR640.47
MYR640.47/unit
In Stock
Omron G2RV-ST Series Electromechanical Interface Relay, DIN Rail, 24V dc Coil, SPDT, 13.5mA
  • RS Stock No. 271-1840
  • Mfr. Part No. G2RV-ST500 24VDC
Subtotal (1 unit)
MYR79.32
MYR79.32/unit
In Stock
Crouzet Monitoring Relay, 3 Phase, 183 to 528 V ac Monitor Range, SPDT, DIN Rail, 208V ac, 480 V ac
  • RS Stock No. 261-915
  • Mfr. Part No. 84873022
Subtotal (1 unit)
MYR516.48
MYR516.48/unit
In Stock
Pepperl + Fuchs 2 Channel Zener Barrier, ATEX
  • RS Stock No. 793-4304
  • Mfr. Part No. Z961
Subtotal (1 unit)
MYR863.05
MYR863.05/unit
In Stock
RS PRO 3RS7002 Series Signal Conditioner, Voltage Input, Voltage Output, 24V dc Supply
  • RS Stock No. 466-2236
Subtotal (1 unit)
MYR891.71
MYR891.71/unit
Temporarily out of stock
Panasonic AQY Series Solid State Relay, 50 mA Load, Surface Mount, 600 V ac/dc Load
  • RS Stock No. 247-4264
  • Mfr. Part No. AQY216EHA
Subtotal (1 tube of 100 units)
MYR1,210.30
MYR12.103/unit
Limited stock
Sensata / Crydom D2 Series Solid State Relay, 25 A Load, Panel Mount, 280 Vrms Load, 32V Control
  • RS Stock No. 346-918
  • Mfr. Part No. D2425
Subtotal (1 unit)
MYR339.55
MYR339.55/unit
In Stock
Schneider Electric Monitoring Relay
  • RS Stock No. 247-1907
  • Mfr. Part No. 56174
Subtotal (1 unit)
MYR2,452.41
MYR2,452.41/unit
In Stock
Finder 80 Series DIN Rail Timer Relay, 1-Contact, 12 to 240 V ac/dc 12V ac, 240 V ac, 0.1 to 20 min, 0.1 to 24 h, 0.1 to
  • RS Stock No. 446-0327
  • Mfr. Part No. 80.01.0.240.0000
Subtotal (1 unit)
MYR312.61
MYR312.61/unit
In Stock
Weidmüller ACT20P Series Signal Converter, Voltage Input, Voltage Output, 24V dc Supply
  • RS Stock No. 287-5329
  • Mfr. Part No. 7760054131
Subtotal (1 unit)
MYR836.75
MYR836.75/unit
Temporarily out of stock
Panasonic PhotoMOS AQY Series Solid State Relay, 50 mA Load, PCB Mount, 600 V Load, 1.5V Control
  • RS Stock No. 173-9034
  • Mfr. Part No. AQY216EH
Subtotal (1 tube of 100 units)
MYR1,199.90
MYR11.999/unit
In Stock
PR Electronics 9100 Series Temperature Converter, Thermocouple, Current, RTD Input, Current, Relay Output, 19.2V dc,
  • RS Stock No. 796-7048
  • Mfr. Part No. 9113BB
Subtotal (1 unit)
MYR3,433.30
MYR3,433.30/unit
In Stock
Finder DIN Rail Relay, 24V dc Coil, 20A Switching Current, 2 NO
  • RS Stock No. 511-1149
  • Mfr. Part No. 22.22.9.024.4000
Subtotal (1 unit)
MYR185.86
MYR185.86/unit
In Stock
SANYU SWITCH Surface Reed Relay, 24 V dc Coil, 1000 V dc Max, 4 kΩ
  • RS Stock No. 286-732
  • Mfr. Part No. URM-16224GTNB
Subtotal (1 unit)
MYR60.19
MYR60.19/unit
In Stock
Siemens 3SK1, 110V ac/dc, 240 V ac/dc Safety Relay, 4 Safety Contacts
  • RS Stock No. 784-5784
  • Mfr. Part No. 3SK1111-1AW20
Subtotal (1 unit)
MYR2,045.47
MYR2,045.47/unit
In Stock
GIC 225 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply
  • RS Stock No. 884-2458
  • Mfr. Part No. 2SC3D11CC3
Subtotal (1 unit)
MYR641.51
MYR641.51/unit
Last RS stock
Omron Power Relay, 240V ac Coil, 10A Switching Current, 4PDT
  • RS Stock No. 827-7845
  • Mfr. Part No. LY4-AC240
Subtotal (1 unit)
MYR80.15
MYR80.15/unit
1
2
3
859
Results per page

Related links