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

17070 Products showing for Relays & Signal Conditioning

5 of 854
In Stock
Releco CT3-A Series Timer Relay, 3-Contact, 220 V dc 20 V ac, 65 V ac, 0.2 to 30 min, 0.2 to 30 s, 1-Function, 3 CO
  • RS Stock No. 459-4420
  • Mfr. Part No. CT3-A30 / L
Subtotal (1 unit)
SGD220.58(exc. GST)
In Stock
Allen Bradley 156-C1P Series Solid State Relay, 20 A Load, 600 V ac Load, 32V Control
  • RS Stock No. 257-5358
  • Mfr. Part No. 156-C1P20NCD
Subtotal (1 unit)
SGD140.91(exc. GST)
In Stock
Sensata / Crydom D2 Series Solid State Relay, 50 A Load, Panel Mount, 280 V ac Load, 32V dc Control
  • RS Stock No. 346-687
  • Mfr. Part No. D2450
Subtotal (1 unit)
SGD101.30(exc. GST)
In Stock
Omron PCB Power Relay, 24 V dc Coil, 15 A Switching Current, DPST
  • RS Stock No. 686-7174
  • Mfr. Part No. G4W-2214P-US-HP DC24
Subtotal (1 unit)
SGD6.88(exc. GST)
Temporarily out of stock
Banner AT, 24 V ac/dc Safety Relay, 2 Safety Contacts
  • RS Stock No. 232-5255
  • Mfr. Part No. ATK-VP6Q5
Subtotal (1 unit)
SGD1,051.87(exc. GST)
In Stock
RS PRO Power Relay, 24 V dc Coil, 10 A Switching Current, DPDT
  • RS Stock No. 121-7811
Subtotal (1 unit)
SGD14.90(exc. GST)
Limited stock
Fujitsu Signal Relay, 12 V dc Coil, 1 A, SPDT
  • RS Stock No. 790-3363
  • Mfr. Part No. SY-12-K
Subtotal (1 unit)
SGD6.68(exc. GST)
In Stock
Finder 38 Series Interface Relay, DIN Rail, 24 V dc Coil, SPST, 10.5 mA
  • RS Stock No. 533-7666
  • Mfr. Part No. 38.81.7.024.8240
Subtotal (1 unit)
SGD50.35(exc. GST)
In Stock
Panasonic DIN Rail Power Relay, 24 V dc Coil, 5 A Switching Current, DPST
  • RS Stock No. 650-2445
  • Mfr. Part No. DSP124F
Subtotal (1 unit)
SGD9.85(exc. GST)
In Stock
Phoenix Contact Pluggable Function Module for use with RIF-4, RIF-3, RIF-2, RIF-1
  • RS Stock No. 224-7569
  • Mfr. Part No. 2900944
Subtotal (1 pack of 10 units)
SGD38.02(exc. GST)
Temporarily out of stock
ABB CR Series Interface Relay, DIN Rail, 48 V ac Coil, SPDT
  • RS Stock No. 237-3124
  • Mfr. Part No. 1SVR405611R5100 CR-M048AC2L
Subtotal (1 unit)
SGD16.60(exc. GST)
In Stock
RS PRO Plug-in Power Relay, 240 V ac Coil, 10 A Switching Current, DPDT
  • RS Stock No. 450-0330
Subtotal (1 unit)
SGD10.99(exc. GST)
In Stock
ABB CRS Series Interface Relay, DIN Rail, 24 V dc Coil, SPDT
  • RS Stock No. 231-9464
  • Mfr. Part No. 1SVR405501R3010 CR-S024VDC1R
Subtotal (1 unit)
SGD13.29(exc. GST)
In Stock
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 12 A Load, DIN Rail Mount, 600 V ac Load, 32V dc Control
  • RS Stock No. 922-1940
  • Mfr. Part No. SSM1A312BD
Subtotal (1 unit)
SGD65.24(exc. GST)
In Stock
Schneider Electric Monitoring Relay, 3 Phase, 183/528 V ac Monitor Range, DPDT, DIN Rail, 208/480 V ac
  • RS Stock No. 179-9433
  • Mfr. Part No. RM22TG20
Subtotal (1 unit)
SGD154.16(exc. GST)
In Stock
Phoenix Contact PSR-SCP, 24 V dc Coupling Relay, 3 Safety Contacts
  • RS Stock No. 712-5263
  • Mfr. Part No. 2986575
Subtotal (1 unit)
SGD294.06(exc. GST)
In Stock
Omron PCB Power Relay, 12 V dc Coil, 16 A Switching Current, SPDT
  • RS Stock No. 366-293
  • Mfr. Part No. G2R-1-E DC12
Subtotal (1 unit)
SGD7.24(exc. GST)
In Stock
Omron Power Relay, 24 V ac Coil, 10 A Switching Current, DPDT
  • RS Stock No. 329-806
  • Mfr. Part No. LY2 24VAC
Subtotal (1 unit)
SGD20.37(exc. GST)
In Stock
Omron G9SE, 24 V dc Safety Relay, 2 Safety Contacts
  • RS Stock No. 265-5203
  • Mfr. Part No. G9SE-201 DC24
Subtotal (1 unit)
SGD221.63(exc. GST)
In Stock
Omron PYF 14 Way 250 V ac DIN Rail Relay Socket, for use with MY4IN, MY4ZIN1, MY4ZN1, MY4N, MY4ZIN1-D2, MY4IN1,
  • RS Stock No. 196-6147
  • Mfr. Part No. PYF14A-N
Subtotal (1 unit)
SGD15.74(exc. GST)
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