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

18555 Products showing for Relays & Signal Conditioning

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Currently unavailable
RS PRO PCB Signal Relay, 24V dc Coil, 3A, DPDT
  • RS Stock No. 193-5858
Subtotal (1 unit)
SGD81.47(exc. GST)
SGD81.47/unit
Currently unavailable
TE Connectivity Panel Mount Power Relay, 12V dc Coil, 300mA Switching Current, DPDT-CO
  • RS Stock No. 796-939
  • Mfr. Part No. 5-1393144-5
Subtotal (1 tray of 20 units)
SGD979.38(exc. GST)
SGD979.38/tray
Stocked by manufacturer
Gefran GRZ-H Series Industrial Mount Solid State Relays, 40 A Load, DIN Rail Mount, 600 V ac Load, 32V dc Control
  • RS Stock No. 600-737
  • Mfr. Part No. F097110/ GRZ-H-3P-2S-40-60-D-0-FAN64-0
Subtotal (1 unit)
SGD688.50(exc. GST)
SGD688.50/unit
Stocked by manufacturer
Siemens Monitoring Relay, 1 Phase, 250 V dc, 115V ac, 230 V ac
  • RS Stock No. 275-1764
  • Mfr. Part No. 7SX8000-3BA50-1CA0-ZP10
Subtotal (1 unit)
SGD9,870.62(exc. GST)
SGD9,870.62/unit
Stocked by manufacturer
Finder PCB Power Relay Module, 12V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 248-1977
  • Mfr. Part No. 406190124300
Subtotal (1 pack of 50 units)
SGD596.00(exc. GST)
SGD11.92/unit
Stocked by manufacturer
TE Connectivity Surface Mount Relay, 12V Coil, 300mA Switching Current, 3PDT
  • RS Stock No. 680-355
  • Mfr. Part No. 9-1393117-8
Subtotal (1 pack of 4 units)
SGD512.90(exc. GST)
SGD512.90/pack
Stocked by manufacturer
Siemens Monitoring Relay, DIN Rail, 24 to 250 V dc, 100V ac, 230 V ac
  • RS Stock No. 275-2119
  • Mfr. Part No. 7SR1811-2NC77-0CA0
Subtotal (1 unit)
SGD12,338.96(exc. GST)
SGD12,338.96/unit
Stocked by manufacturer
Jelsystem IP1 Series Solid State Relay, 15 A Load, Surface Mount, 264 Vrms Load, 30V dc Control
  • RS Stock No. 459-765
  • Mfr. Part No. IP1-S225
Subtotal (1 unit)
SGD93.18(exc. GST)
SGD93.18/unit
In Stock
TE Connectivity PCB Power Relay, 24V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 680-4123P
  • Mfr. Part No. RY531024
Subtotal 1 unit (supplied in a box)
SGD4.07(exc. GST)
SGD4.07/unit
In Stock
Celduc SOB8 Series Solid State Relay, DIN Rail Mount, 600 V ac Load, 30V ac/dc Control
  • RS Stock No. 917-4829
  • Mfr. Part No. SOB863860
Subtotal (1 unit)
SGD223.04(exc. GST)
SGD223.04/unit
Temporarily out of stock
Panasonic Through Hole High Frequency Relay, 24V dc Coil, 3 GHz Max. Coil Freq., SPDT
  • RS Stock No. 173-9050
  • Mfr. Part No. ARS1124
Subtotal (1 box of 50 units)
SGD1,736.45(exc. GST)
SGD34.729/unit
In Stock
Aratas PCB Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 683-8876P
  • Mfr. Part No. G2RL-1-E-CF DC12
Subtotal 1 unit (supplied in a tube)
SGD6.35(exc. GST)
SGD6.35/unit
In Stock
Celduc SO7 Series Solid State Relay, 50 A Load, DIN Rail Mount, 275 Vrms Load, 32V Control
  • RS Stock No. 499-0711
  • Mfr. Part No. SO745090
Subtotal (1 unit)
SGD99.02(exc. GST)
SGD99.02/unit
Stocked by manufacturer
TE Connectivity Through Hole Relay, 120V Coil, 300mA Switching Current, CO
  • RS Stock No. 817-139
  • Mfr. Part No. 8-1393766-1
Subtotal (1 pack of 50 units)
SGD12,977.49(exc. GST)
SGD12,977.49/pack
Temporarily out of stock
Crydom HA Series Solid State Relay, 50 A Load, Panel Mount, 660 V ac Load, 280V Control
  • RS Stock No. 291-2315
  • Mfr. Part No. HA6050
Subtotal (1 unit)
SGD138.53(exc. GST)
SGD138.53/unit
Temporarily out of stock
Tele V2ZS20 Series DIN Rail Timer Relay, 2-Contact, 240 V dc 12V ac, 240 V ac, 0.5 → 10 s, 1.5 → 30 s, 3
  • RS Stock No. 798-3527
  • Mfr. Part No. V2ZS20 12-240V AC/DC
Subtotal (1 unit)
SGD124.51(exc. GST)
SGD124.51/unit
Temporarily out of stock
Tele Monitoring Relay, 1 Phase, SPDT, DIN Rail, 24V ac 24 V dc
  • RS Stock No. 730-0499
  • Mfr. Part No. E1UU230V01
Subtotal (1 unit)
SGD134.78(exc. GST)
SGD134.78/unit
Last RS stock
Schneider Electric Power Relay, Plug-in Mount
  • RS Stock No. 922-1663
  • Mfr. Part No. RXG12RD
Subtotal (1 unit)
SGD23.94(exc. GST)
SGD23.94/unit
In Stock
TE Connectivity PCB Power Relay, 115V ac Coil, 8A Switching Current, DPDT
  • RS Stock No. 718-2008
  • Mfr. Part No. 9-1393243-2
Subtotal (1 unit)
SGD23.68(exc. GST)
SGD23.68/unit
In Stock
Finder DIN Rail Monostable Relay, 110V ac Coil, 20A Switching Current, SPST
  • RS Stock No. 248-1767
  • Mfr. Part No. 222381104000
Subtotal (1 pack of 5 units)
SGD359.70(exc. GST)
SGD71.94/unit
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