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

17155 Products showing for Relays & Signal Conditioning

1 of 858
Temporarily out of stock
Omron DIN Rail Timer Relay, 2-Contact, 24 to 48 V ac/dc 24V ac, 48 V ac, 0.1 to 12 s, 1-Function, SPDT Switch
  • RS Stock No. 264-1638
  • Mfr. Part No. H3DK-HBS 24-48VAC/DC
Subtotal (1 unit)
SGD151.40(exc. GST)
In Stock
Panasonic PCB Signal Relay, 24V dc Coil, 1A, DPDT
  • RS Stock No. 815-4815
  • Mfr. Part No. AGQ20024
Subtotal (1 unit)
SGD6.86(exc. GST)
Limited stock
Sensata / Crydom 1 Series Solid State Relay, 40 A Load, Panel Mount, 280 Vrms Load, 32V dc Control
  • RS Stock No. 736-0867
  • Mfr. Part No. D2440
Subtotal (1 unit)
SGD87.50(exc. GST)
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply, ATEX
  • RS Stock No. 489-2904
  • Mfr. Part No. 2864150
Subtotal (1 unit)
SGD605.67(exc. GST)
In Stock
Dold Monitoring Relay, 3 Phase, NC, DIN Rail to 4A, 100 V ac, 400V ac
  • RS Stock No. 427-646
  • Mfr. Part No. IK9171.11/200 3/N AC400/230V 0,85UN
Subtotal (1 unit)
SGD158.08(exc. GST)
In Stock
Sensata / Crydom GN Series Solid State Relay, 125 A Load, Panel Mount, 660 V ac Load, 32V dc Control
  • RS Stock No. 145-0562
  • Mfr. Part No. 84134180
Subtotal (1 unit)
SGD265.81(exc. GST)
In Stock
Better World
Schneider Electric Power Relay, 24V dc Coil, 12A Switching Current, DPDT
  • RS Stock No. 884-1278
  • Mfr. Part No. RXM2AB2BD
Subtotal (1 unit)
SGD17.71(exc. GST)
In Stock
Finder PCB Power Relay, 24V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 351-617
  • Mfr. Part No. 40.31.7.024.0000
Subtotal (1 unit)
SGD8.12(exc. GST)
Limited stock
Omron 8 Way 250V ac DIN Rail Relay Socket, for use with Miniature Power Relays
  • RS Stock No. 186-4179
  • Mfr. Part No. PYFZ-08-E
Subtotal (1 unit)
SGD14.68(exc. GST)
In Stock
TE Connectivity PCB Signal Relay, 5V dc Coil, 2A, DPDT
  • RS Stock No. 718-1774
  • Mfr. Part No. 1-1462038-3
Subtotal (1 unit)
SGD5.11(exc. GST)
In Stock
i-Autoc KSIM Series Solid State Relay, 25 A Load, Panel Mount, 440 V ac Load, 32V dc Control
  • RS Stock No. 102-5546
  • Mfr. Part No. KSIM380D25-L
Subtotal (1 unit)
SGD32.38(exc. GST)
In Stock
TE Connectivity PT 78 14 Way 240V ac DIN Rail Relay Socket, for use with PT3 Series
  • RS Stock No. 511-7030
  • Mfr. Part No. PT78730 9-1415071-1
Subtotal (1 unit)
SGD20.32(exc. GST)
In Stock
Sensata / Crydom CW Series Solid State Relay, 50 A Load, Panel Mount, 660 V ac Load, 32V Control
  • RS Stock No. 491-4931
  • Mfr. Part No. CWD4850-10
Subtotal (1 unit)
SGD135.32(exc. GST)
In Stock
Omron PCB Relay, 240V ac Coil, 1A Switching Current, SPST
  • RS Stock No. 243-6608
  • Mfr. Part No. G7L-1A-TUB 200/240AC
Subtotal (1 unit)
SGD26.03(exc. GST)
In Stock
Eaton Monitoring Relay, 3 Phase, 200/500 V ac Monitor Range, DIN Rail, 200V ac, 500 V ac
  • RS Stock No. 179-3516
  • Mfr. Part No. 184789 EMR6-F500-G-1
Subtotal (1 unit)
SGD212.59(exc. GST)
Temporarily out of stock
Tele Monitoring Relay, 1 Phase, DPDT, DIN Rail to 35A, 24V ac, 240 V ac
  • RS Stock No. 123-9728
  • Mfr. Part No. V4IM35AL20 24-240V AC/DC
Subtotal (1 unit)
SGD283.54(exc. GST)
In Stock
Finder DIN Rail Power Relay, 24V dc Coil, 16A Switching Current
  • RS Stock No. 225-4644
  • Mfr. Part No. 20.23.9.024.4000
Subtotal (1 unit)
SGD55.41(exc. GST)
In Stock
Phoenix Contact PLC-RPT- 5DC/21 Series Relay Module, DIN Rail, 110V dc Coil, DPDT, 4.5mA
  • RS Stock No. 434-1355
  • Mfr. Part No. 2967086
Subtotal (1 unit)
SGD35.54(exc. GST)
In Stock
Phoenix Contact RIF-1-BPT/2X21 2 Way 250V ac/dc DIN Rail Relay Base, for use with Miniature Power Relay
  • RS Stock No. 224-7561
  • Mfr. Part No. 2900931
Subtotal (1 pack of 10 units)
SGD68.71(exc. GST)
In Stock
Phoenix Contact Diode, Yellow LED, 2900939 2
  • RS Stock No. 204-7673
  • Mfr. Part No. 2900939
Subtotal (1 pack of 10 units)
SGD39.40(exc. GST)
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