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

17074 Products showing for Relays & Signal Conditioning

853 / 854
Stocked by manufacturer
Schneider Electric Protection Module for use with RSZ sockets
  • RS Stock No. 781-836
  • Mfr. Part No. RZM041FU7
Subtotal (1 pack of 10 units)
MYR227.70
MYR227.70/pack
New product - Preorder today
TE Connectivity Board Power Relay, 6V dc Coil, 12A Switching Current, CO
  • RS Stock No. 788-104
  • Mfr. Part No. 9-1415546-8
Subtotal (1 box of 20 units)
MYR2,492.77
MYR2,492.77/box
New product - Preorder today
TE Connectivity PCB Power Relay, 18V dc Coil, 30A Switching Current, 1 NC
  • RS Stock No. 788-055
  • Mfr. Part No. 1558662-5
Subtotal (1 tube of 70 units)
MYR1,215.76
MYR1,215.76/tube
Stocked by manufacturer
Phoenix Contact PLC Series Relay, DIN Rail, 48V ac Coil
  • RS Stock No. 717-202
  • Mfr. Part No. 2959997
Subtotal (1 box of 10 units)
MYR1,237.78
MYR1,237.78/box
New product - Preorder today
Lovato Relay SPDT 1
  • RS Stock No. 820-428
  • Mfr. Part No. 31RM48
Subtotal (1 unit)
MYR2,519.63
MYR2,519.63/unit
Temporarily out of stock
Motrona AX350 Series Process Indicator, Digital Input, 30V Supply, EN IEC 63000
  • RS Stock No. 719-386
  • Mfr. Part No. AX350
Subtotal (1 unit)
MYR1,641.61
MYR1,641.61/unit
Stocked by manufacturer
Schneider Electric RSB Series Interface Relay, DIN Rail, 24V Coil, 1 CO, 16A
  • RS Stock No. 778-369
  • Mfr. Part No. RSB1A160B7
Subtotal (1 pack of 10 units)
MYR293.44
MYR293.44/pack
Temporarily out of stock
Carlo Gavazzi RM1E Series Solid State Relay, 50 A Load, Panel Mount Mount, 480 V ac Load, 10V dc Control
  • RS Stock No. 729-976
  • Mfr. Part No. RM1E48V50
Subtotal (1 unit)
MYR1,196.03
MYR1,196.03/unit
In Stock
Trumeter SC Series Signal Conditioner, Current/Voltage Input, Analogue, Digital Output
  • RS Stock No. 759-686
  • Mfr. Part No. SC-PWR-DIN
Subtotal (1 unit)
MYR1,177.93
MYR1,177.93/unit
New product - Preorder today
TE Connectivity DIN Rail Relay, 26.5V Coil, 1.0A, DPDT
  • RS Stock No. 795-283
  • Mfr. Part No. 5-1617542-9
Subtotal (1 pack of 2 units)
MYR2,154.08
MYR2,154.08/pack
Stocked by manufacturer
SANYU SWITCH Axial Relay, 12 V dc Coil, 2 Form A, 3500 V Max, 3 A Max, 160 Ω
  • RS Stock No. 736-402
  • Mfr. Part No. USM-21512H
Subtotal (1 unit)
MYR370.45
MYR370.45/unit
Currently unavailable
Sensata / Crydom LVD Series Solid State Relay, 40 A Load, Panel Mount, 75 V dc Load, 11.5V dc Control
  • RS Stock No. 741-3403
  • Mfr. Part No. LVD75A40
Subtotal (1 unit)
MYR617.85
MYR617.85/unit
New product - Preorder today
TE Connectivity SSRK Series Solid State Relay, 30 A Load, DIN Rail Mount, 240 Vrms Load, 280V Control
  • RS Stock No. 788-102
  • Mfr. Part No. 9-1393030-1
Subtotal (1 box of 4 units)
MYR1,588.38
MYR1,588.38/box
New product - Preorder today
TE Connectivity SSRK Series Series Solid State Relay, 30 A Load, DIN Rail Mount, 660 V ac Load, 32V dc Control
  • RS Stock No. 796-705
  • Mfr. Part No. 6-1393030-8
Subtotal (1 bag of 2 units)
MYR1,985.06
MYR1,985.06/bag
Temporarily out of stock
SANYU SWITCH Axial Relay, 12 V dc Coil, 1 Form A (NO), 1000 V Max, 3 A Max, 300 Ω
  • RS Stock No. 736-409
  • Mfr. Part No. USM-12712H
Subtotal (1 unit)
MYR132.83
MYR132.83/unit
New product - Preorder today
TE Connectivity Through Hole General Purpose Relay, 26.5V Coil, 5A Switching Current, DPDT-CO
  • RS Stock No. 786-452
  • Mfr. Part No. 5-1617022-3
Subtotal (1 unit)
MYR1,144.49
MYR1,144.49/unit
Stocked by manufacturer
Siemens Monitoring Relay, Panel, 24 to 250 V dc, 100V ac, 230 V ac
  • RS Stock No. 275-2158
  • Mfr. Part No. 7SR1813-2NC12-0DA0
Subtotal (1 unit)
MYR35,488.13
MYR35,488.13/unit
Temporarily out of stock
RS PRO Power Relay, 110V ac Coil, 12A Switching Current, SPDT
  • RS Stock No. 144-1599
Subtotal (1 unit)
MYR54.55
MYR54.55/unit
Temporarily out of stock
TE Connectivity Plug-in General Purpose Relay, 12V dc Coil, 3A Switching Current, 4PDT
  • RS Stock No. 728-658
  • Mfr. Part No. 2-2071745-1
Subtotal (1 box of 300 units)
MYR30,698.21
MYR30,698.21/box
New product - Preorder today
TE Connectivity Board Power Relay, 24V dc Coil, 16A Switching Current, SPST-NO
  • RS Stock No. 814-974
  • Mfr. Part No. 6-1415899-7
Subtotal (1 box of 100 units)
MYR1,421.66
MYR1,421.66/box
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