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

17808 Products showing for Relays & Signal Conditioning

13 of 891
In Stock
Omron PCB Power Relay, 12V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 366-259
  • Mfr. Part No. G2R-1 DC12
Subtotal (1 unit)
SGD7.03(exc. GST)
SGD7.03/unit
In Stock
Omron Power Relay, 24V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 794-8114
  • Mfr. Part No. G2R-2-SND 24VDC (S)
Subtotal (1 unit)
SGD30.70(exc. GST)
SGD30.70/unit
In Stock
ABB Monitoring Relay, 1 Phase, DPDT, DIN Rail, 0.1mA to 100mA, 240 V dc, 240V ac
  • RS Stock No. 775-7974
  • Mfr. Part No. 1SVR730840R0400 CM-SRS.21S
Subtotal (1 unit)
SGD353.12(exc. GST)
SGD353.12/unit
In Stock
Lovato TMM 1 Series DIN Rail Timer Relay, 2-Contact, 12 to 240 V ac/dc 12V ac, 240 V ac, 0.1 s to 999 h,
  • RS Stock No. 176-9804
  • Mfr. Part No. TMM1NFC
Subtotal (1 unit)
SGD149.96(exc. GST)
SGD149.96/unit
In Stock
Finder 94 14 Way 250V ac DIN Rail Relay Socket, for use with 55.34 Series Relay
  • RS Stock No. 189-3263
  • Mfr. Part No. 94.74SMA
Subtotal (1 unit)
SGD18.51(exc. GST)
SGD18.51/unit
In Stock
Panasonic Surface Signal Relay, 12V dc Coil, 1A, SPDT
  • RS Stock No. 173-8204
  • Mfr. Part No. TQ2SA-12V
Subtotal (1 tube of 50 units)
SGD184.15(exc. GST)
SGD3.683/unit
Limited stock
Sensata / Crydom D2W Series Solid State Relay, 3 A Load, PCB Mount, 280 Vrms Load, 32V dc Control
  • RS Stock No. 738-5569
  • Mfr. Part No. D2W203F
Subtotal (1 unit)
SGD38.39(exc. GST)
SGD38.39/unit
In Stock
WAGO 788 2 Way 300V DIN Rail Relay Socket, for use with Basic Relays
  • RS Stock No. 279-4188
  • Mfr. Part No. 788-103
Subtotal (1 unit)
SGD12.00(exc. GST)
SGD12.00/unit
In Stock
RS PRO Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
  • RS Stock No. 121-7798
Subtotal (1 unit)
SGD17.53(exc. GST)
SGD17.53/unit
In Stock
Celduc SO8 Series Solid State Relay, 40 A Load, DIN Rail Mount, 275 Vrms Load, 265V Control
  • RS Stock No. 499-0547
  • Mfr. Part No. SO843970
Subtotal (1 unit)
SGD82.45(exc. GST)
SGD82.45/unit
Temporarily out of stock
Eaton Monitoring Relay, 3 Phase, 530/820 V ac Monitor Range, 2 CO, Snapped, 530V ac, 820 V ac 0 to 0 V dc
  • RS Stock No. 179-3533
  • Mfr. Part No. 184767 EMR6-AWM820-J-1
Subtotal (1 unit)
SGD534.23(exc. GST)
SGD534.23/unit
In Stock
Schneider Electric Temperature Monitoring Relays, 3 Phase, 2 NO, DIN Rail, 264 V dc 264V ac
  • RS Stock No. 655-203
  • Mfr. Part No. RM35TM50MW
Subtotal (1 unit)
SGD364.16(exc. GST)
SGD364.16/unit
In Stock
TE Connectivity PCB Power Relay, 5V dc Coil, 8A Switching Current, SPDT
  • RS Stock No. 512-9285
  • Mfr. Part No. RY611005
Subtotal (1 unit)
SGD5.12(exc. GST)
SGD5.12/unit
In Stock
Phoenix Contact MACX MCR-SL-RPSSI-I Series Signal Conditioner, Current Input, Current Output, 19.2V dc, 30 V dc Supply,
  • RS Stock No. 801-6185
  • Mfr. Part No. 2865955
Subtotal (1 unit)
SGD483.93(exc. GST)
SGD483.93/unit
In Stock
Schneider Electric Power Relay, 12V dc Coil, 10A Switching Current, 3PDT
  • RS Stock No. 884-1528
  • Mfr. Part No. RXM3AB2JD
Subtotal (1 unit)
SGD11.82(exc. GST)
SGD11.82/unit
Temporarily out of stock
Pilz 787302, 24V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 340-201
  • Mfr. Part No. 787302
Subtotal (1 unit)
SGD674.66(exc. GST)
SGD674.66/unit
In Stock
Celduc SOM Series Solid State Relay, 20 A Load, DIN Rail Mount, 40 V dc Load, 32V dc Control
  • RS Stock No. 666-4382
  • Mfr. Part No. SOM02060
Subtotal (1 unit)
SGD138.25(exc. GST)
SGD138.25/unit
In Stock
Finder Marker Tag for use with Relay Type, 46.61, 46.52
  • RS Stock No. 123-2858
  • Mfr. Part No. 097.00
Subtotal (1 unit)
SGD0.25(exc. GST)
SGD0.25/unit
In Stock
Weidmüller TOZ Solid State Interface Relay 3V dc, 48 V dc DIN Rail Screw
  • RS Stock No. 892-8883
  • Mfr. Part No. 1127050000
Subtotal (1 unit)
SGD39.08(exc. GST)
SGD39.08/unit
In Stock
RS Better World
Schneider Electric PCB Power Relay, 24V dc Coil, 12A Switching Current, 1 CO
  • RS Stock No. 742-3731
  • Mfr. Part No. RSB1A120BD
Subtotal (1 unit)
SGD7.38(exc. GST)
SGD7.38/unit
1
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