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

17824 Products showing for Relays & Signal Conditioning

851 of 892
In Stock
Finder 81 Series DIN Rail Multi-Timer, 12 to 230 V dc 230V ac, 0.1 to 10 h, 7-Function, SPDT Switch Configuration
  • RS Stock No. 257-7425
  • Mfr. Part No. 810102300000
Subtotal (1 unit)
SGD136.97(exc. GST)
SGD136.97/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)
SGD87.64(exc. GST)
SGD87.64/pack
In Stock
Finder, 093.01
  • RS Stock No. 776-1686
  • Mfr. Part No. 093.01
Subtotal (1 unit)
SGD2.05(exc. GST)
SGD2.05/unit
In Stock
TE Connectivity 2071566 8 Way 250V DIN Rail Relay Socket, for use with Relay
  • RS Stock No. 272-7708
  • Mfr. Part No. 2071566-3
Subtotal (1 unit)
SGD6.07(exc. GST)
SGD6.07/unit
In Stock
TE Connectivity PCB Power Relay, 24V dc Coil, 8A Switching Current, DPST
  • RS Stock No. 680-3919P
  • Mfr. Part No. RT444024
Subtotal 1 unit (supplied in a tube)
SGD7.05(exc. GST)
SGD7.05/unit
In Stock
Finder 39 Solid State Interface Relay 400V DIN Rail
  • RS Stock No. 819-8821
  • Mfr. Part No. 39.60.7.006.9024
Subtotal (1 unit)
SGD77.23(exc. GST)
SGD77.23/unit
In Stock
Teledyne PCB RF Relay, 5V dc Coil, DPDT
  • RS Stock No. 758-2467
  • Mfr. Part No. 732D-5
Subtotal (1 unit)
SGD131.22(exc. GST)
SGD131.22/unit
In Stock
Siemens 3RP20 Series DIN Rail Timer Relay, 1-Contact, 24 V dc 24V ac, 0.05 s to 100 h, Multifunction-Function, SPDT
  • RS Stock No. 124-9396
  • Mfr. Part No. 3RP2005-2AP30
Subtotal (1 unit)
SGD313.72(exc. GST)
SGD313.72/unit
In Stock
TE Connectivity Panel Power Relay, 24V dc Coil, 1A Switching Current, SPDT
  • RS Stock No. 267-4938
  • Mfr. Part No. 4-1393240-8
Subtotal (1 bag of 2 units)
SGD8.99(exc. GST)
SGD4.495/unit
Temporarily out of stock
Omron Power Relay, 100V ac, 110 V ac Coil, 15A Switching Current, SPDT
  • RS Stock No. 102-685
  • Mfr. Part No. LY1N AC100/110
Subtotal (1 unit)
SGD17.26(exc. GST)
SGD17.26/unit
Stocked by manufacturer
Phoenix Contact 1157 Series Signal Conditioner, Voltage Input, Voltage Output, IECEx, ATEX
  • RS Stock No. 497-323
  • Mfr. Part No. 1157869
Subtotal (1 unit)
SGD480.33(exc. GST)
SGD480.33/unit
In Stock
Eaton Monitoring Relay, SPST, DIN Rail, 0A to 16.9A, 30 V dc
  • RS Stock No. 263-514
  • Mfr. Part No. PXS24S13A001 PXS24S-e13/F/ORT-IT
Subtotal (1 unit)
SGD119.42(exc. GST)
SGD119.42/unit
In Stock
TE Connectivity PCB Power Relay, 110V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 680-3956P
  • Mfr. Part No. RTE24110
Subtotal 1 unit (supplied in a tube)
SGD6.75(exc. GST)
SGD6.75/unit
Limited stock
Omron Surface Signal Relay, 5V dc Coil, 1A, DPDT
  • RS Stock No. 683-9586P
  • Mfr. Part No. G6J-2FS-Y DC5
Subtotal 1 unit (supplied in a tube)
SGD5.53(exc. GST)
SGD5.53/unit
Stocked by manufacturer
Gefran GRZ-H Series Industrial Mount Solid State Relays, 25 A Load, DIN Rail Mount, 480 V ac Load, 32V dc Control
  • RS Stock No. 601-160
  • Mfr. Part No. F095427/ GRZ-H-3P-2S-25I-48-D-0-0-0
Subtotal (1 unit)
SGD417.68(exc. GST)
SGD417.68/unit
Currently unavailable
Sensata / Crydom LR Series Solid State Relay, 40 A Load, PCB Mount, 530 Vrms Load, 32V dc Control
  • RS Stock No. 738-5585P
  • Mfr. Part No. LR1200480D40
Subtotal 1 unit (supplied in a bag)
SGD93.50(exc. GST)
SGD93.50/unit
In Stock
Omron PCB Power Relay, 5V dc Coil, 5A Switching Current, DPST
  • RS Stock No. 683-8735P
  • Mfr. Part No. G2R-2A DC5
Subtotal 1 unit (supplied in a box)
SGD8.13(exc. GST)
SGD8.13/unit
In Stock
TE Connectivity PCB Power Relay, 12V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 680-4182
  • Mfr. Part No. RYA31012
Subtotal (1 unit)
SGD5.41(exc. GST)
SGD5.41/unit
Temporarily out of stock
Sensata / Cynergy3 PCB Reed Relay, 5V dc Coil, SPST, 7000V dc Max, 2A Max, 28 Ω
  • RS Stock No. 189-2168
  • Mfr. Part No. DAT70505FU
Subtotal (1 box of 20 units)
SGD1,408.37(exc. GST)
SGD1,408.37/box
Temporarily out of stock
Weidmüller ACT20M Series Signal Conditioner, Current Input, Current Output, 24V dc Supply, FM Div2, UL, ATEX
  • RS Stock No. 892-8943
  • Mfr. Part No. 1175980000
Subtotal (1 unit)
SGD298.41(exc. GST)
SGD298.41/unit
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