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

7 of 859
In Stock
TE Connectivity Surface Signal Relay, 5V dc Coil, 2A, DPDT
  • RS Stock No. 422-7063
  • Mfr. Part No. IM03GR
Subtotal (1 unit)
$6.27(exc. GST)
$6.27/unit
In Stock
PR Electronics 4100 Series Universal Transmitter, Universal Input, Relay Output, 21.6 V ac, 253 V ac, 19.2V dc, 300 V dc
  • RS Stock No. 796-6913
  • Mfr. Part No. 4131
Subtotal (1 unit)
$354.23(exc. GST)
$354.23/unit
In Stock
Phoenix Contact PLC-OSC- 24DC/ 24DC/ 10/R Solid State Interface Relay 33V DIN Rail Screw
  • RS Stock No. 742-4371
  • Mfr. Part No. 2982702
Subtotal (1 unit)
$189.38(exc. GST)
$189.38/unit
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Resistance Input, Current/Voltage Output, 24V dc Supply, ATEX
  • RS Stock No. 616-8944
  • Mfr. Part No. 2864095
Subtotal (1 unit)
$975.65(exc. GST)
$975.65/unit
In Stock
Hongfa Europe GMBH PCB Signal Relay, 5V dc Coil, 2A, DPDT
  • RS Stock No. 176-2968
  • Mfr. Part No. HFD3/5-L2
Subtotal (1 pack of 5 units)
$28.16(exc. GST)
$5.632/unit
In Stock
Carlo Gavazzi RGC3P Series Solid State Relay, 37 A Load, DIN Rail Mount, 660 V ac Load, 10V dc Control
  • RS Stock No. 188-5288
  • Mfr. Part No. RGC3P60V30C1DM
Subtotal (1 unit)
$929.86(exc. GST)
$929.86/unit
In Stock
RS PRO TCR Series Panel Timer Relay, 2-Contact, 24 V dc 24V ac, 0.1 s to 300 h, 1-Function, 2 x SPDT Switch
  • RS Stock No. 179-2926
Subtotal (1 unit)
$58.56(exc. GST)
$58.56/unit
In Stock
Finder 38 Series Interface Relay, DIN Rail, 24V ac/dc Coil, DPDT, 20mA
  • RS Stock No. 613-6896
  • Mfr. Part No. 38.62.0.024.0060
Subtotal (1 unit)
$53.29(exc. GST)
$53.29/unit
In Stock
Idec SJ 5 Way 300V ac DIN Rail Relay Socket, for use with RJ & RF2S
  • RS Stock No. 212-2513
  • Mfr. Part No. SJ1S-21L
Subtotal (1 unit)
$13.02(exc. GST)
$13.02/unit
In Stock
Carlo Gavazzi RM1 Series Solid State Relay, 50 A Load, Panel Mount, 530 V Load, 32V Control
  • RS Stock No. 479-0410
  • Mfr. Part No. RM1A48D50
Subtotal (1 unit)
$97.66(exc. GST)
$97.66/unit
In Stock
Phoenix Contact, 24V dc Safety Relay, 2
  • RS Stock No. 567-417
  • Mfr. Part No. 1158056
Subtotal (1 pack of 10 units)
$542.22(exc. GST)
$542.22/pack
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Current/Voltage Input, Transistor Output, 30V dc, 9.6 V dc Supply,
  • RS Stock No. 849-6314
  • Mfr. Part No. 2902026
Subtotal (1 unit)
$638.53(exc. GST)
$638.53/unit
In Stock
Finder 58 Series Interface Relay, DIN Rail, 24V dc Coil, 4PDT, 40mA
  • RS Stock No. 623-7292
  • Mfr. Part No. 58.34.9.024.0050SMA
Subtotal (1 unit)
$58.60(exc. GST)
$58.60/unit
In Stock
Hongfa Europe GMBH PCB Signal Relay, 24V dc Coil, 2A, DPDT
  • RS Stock No. 176-2957
  • Mfr. Part No. HFD31/24-S
Subtotal (1 pack of 5 units)
$18.07(exc. GST)
$3.614/unit
In Stock
Eaton Galvanic Barrier, Analogue, ATEX
  • RS Stock No. 174-7911
  • Mfr. Part No. MTL5532
Subtotal (1 unit)
$1,376.13(exc. GST)
$1,376.13/unit
In Stock
Phoenix Contact DIN Rail Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 794-3812
  • Mfr. Part No. 2903677
Subtotal (1 unit)
$24.80(exc. GST)
$24.80/unit
In Stock
Meder Reed Relay
  • RS Stock No. 349-1803
  • Mfr. Part No. BE12-1A74-M
Subtotal (1 unit)
$59.49(exc. GST)
$59.49/unit
Temporarily out of stock
Broadcom ASSR-V62X Series Solid State Relay, 15 μA Load, Surface Mount, 0.8V Control
  • RS Stock No. 178-3195
  • Mfr. Part No. ASSR-V621-302E
Subtotal (1 tube of 50 units)
$320.75(exc. GST)
$6.415/unit
In Stock
Finder 97 8 Way 250V ac DIN Rail Relay Socket, for use with 46.52 Relay
  • RS Stock No. 123-2854
  • Mfr. Part No. 97.P2SPA
Subtotal (1 unit)
$19.63(exc. GST)
$19.63/unit
Stocked by manufacturer
Phoenix Contact PLC-RPT- 5DC/1/SSI Series Solid State Relay, 6 A Load, 250 V ac/dc Load, 24V Control
  • RS Stock No. 220-5712
  • Mfr. Part No. 1094764
Subtotal (1 pack of 10 units)
$861.53(exc. GST)
$86.153/unit
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