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

17713 Products showing for Relays & Signal Conditioning

1 of 886
In Stock
TE Connectivity PCB Power Relay, 12V dc Coil, 12A Switching Current, SPDT
  • RS Stock No. 718-1718
  • Mfr. Part No. 1-1415899-0
Subtotal (1 unit)
TWD82.00(exc. GST)
TWD82.00/unit
In Stock
Omron Non-Latching Relay, 21V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 230-5174
  • Mfr. Part No. G2RV-1-S-G DC21
Subtotal (1 unit)
TWD329.00(exc. GST)
TWD329.00/unit
Temporarily out of stock
Omron Power Relay, 200V ac, 240 V ac Coil, 30A Switching Current, DPST
  • RS Stock No. 818-4250
  • Mfr. Part No. G7L-1A-TUB 200/240VAC
Subtotal (1 unit)
TWD878.00(exc. GST)
TWD878.00/unit
Last RS stock
Weidmüller TRZ Series Interface Relay, DIN Rail, 230V ac/dc, 24 V ac/dc Coil, SPDT
  • RS Stock No. 892-8861
  • Mfr. Part No. 1122970000
Subtotal (1 unit)
TWD903.00(exc. GST)
TWD903.00/unit
In Stock
TE Connectivity Surface Signal Relay, 5V dc Coil, 2A, DPDT
  • RS Stock No. 422-7063
  • Mfr. Part No. IM03GR
Subtotal (1 unit)
TWD92.00(exc. GST)
TWD92.00/unit
In Stock
Crydom 1 Series Solid State Relay, 40 A Load, Panel Mount, 280 Vrms Load, 280Vrms Control
  • RS Stock No. 352-525
  • Mfr. Part No. A2440
Subtotal (1 unit)
TWD1,886.00(exc. GST)
TWD1,886.00/unit
In Stock
Omron H3DS Series DIN Rail Timer Relay, 1-Contact, 48 V dc 230V ac, 24 V ac, 0.1 s to 120 h, Multifunction-Function,
  • RS Stock No. 365-6993
  • Mfr. Part No. H3DS-SL AC/DC
Subtotal (1 unit)
TWD1,719.00(exc. GST)
TWD1,719.00/unit
In Stock
RS PRO TKB Series Timer Relay, 2-Contact, 24 V dc 24V ac, 2 to 60 s, 1-Function, DPDT Switch Configuration
  • RS Stock No. 179-2951
Subtotal (1 unit)
TWD1,215.00(exc. GST)
TWD1,215.00/unit
In Stock
RS PRO TKB Series Timer Relay, 2-Contact, 24 V dc 24V ac, 0.1 to 1 s, 1-Function, DPDT Switch Configuration
  • RS Stock No. 179-2947
Subtotal (1 unit)
TWD1,215.00(exc. GST)
TWD1,215.00/unit
In Stock
RS PRO Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 121-7829
Subtotal (1 unit)
TWD391.00(exc. GST)
TWD391.00/unit
In Stock
Omron DIN Rail Power Relay, 48V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 200-1350
  • Mfr. Part No. G2RV-1-S-G DC48
Subtotal (1 unit)
TWD362.00(exc. GST)
TWD362.00/unit
In Stock
Crydom 1 Series Solid State Relay, 25 A Load, Panel Mount, 280 Vrms Load, 280Vrms Control
  • RS Stock No. 291-1895
  • Mfr. Part No. A2425
Subtotal (1 unit)
TWD1,606.00(exc. GST)
TWD1,606.00/unit
In Stock
Omron G3PJ Series Solid State Relay, 15 A Load, DIN Rail Mount, 264 V ac Load, 24V dc Control
  • RS Stock No. 111-3034
  • Mfr. Part No. G3PJ-215B DC12-24
Subtotal (1 unit)
TWD2,393.00(exc. GST)
TWD2,393.00/unit
In Stock
Phoenix Contact PSR-ESA, 24V ac/dc Safety Relay, 4 Safety Contacts, 1
  • RS Stock No. 666-7044
  • Mfr. Part No. 2963802
Subtotal (1 unit)
TWD5,461.00(exc. GST)
TWD5,461.00/unit
In Stock
ABB CRP Series Interface Relay, DIN Rail, 24V dc Coil, DPDT, 8A
  • RS Stock No. 231-9487
  • Mfr. Part No. 1SVR405601R1000 CR-P024DC2
Subtotal (1 unit)
TWD174.00(exc. GST)
TWD174.00/unit
In Stock
Omron Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 329-799
  • Mfr. Part No. LY2 24VDC
Subtotal (1 unit)
TWD456.00(exc. GST)
TWD456.00/unit
In Stock
TE Connectivity PCB Power Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 680-3824
  • Mfr. Part No. RT33L012
Subtotal (1 unit)
TWD123.00(exc. GST)
TWD123.00/unit
In Stock
Retaining Relay Clip Omron MY Series G4Q
  • RS Stock No. 466-447
  • Mfr. Part No. PYC-A1
Subtotal (1 bag of 5 pairs)
TWD179.00(exc. GST)
TWD179.00/bag
In Stock
Hongfa Europe GMBH PCB Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 923-2616
  • Mfr. Part No. HF41F-024-ZS
Subtotal (1 unit)
TWD159.00(exc. GST)
TWD159.00/unit
Temporarily out of stock
Crydom 53TP Series Solid State Relay, 50 A Load, Panel Mount, 530 Vrms Load, 280Vrms Control
  • RS Stock No. 218-1921
  • Mfr. Part No. A53TP50D
Subtotal (1 unit)
TWD7,134.00(exc. GST)
TWD7,134.00/unit
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