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

17174 Products showing for Relays & Signal Conditioning

3 of 859
In Stock
Better World
Schneider Electric Harmony Relay RXM Series Interface Relay, DIN Rail Mount, 24V dc Coil, 4PDT, 4-Pole
  • RS Stock No. 203-5217
  • Mfr. Part No. RXM4AB2BDPVS
Each
SGD60.33(exc. GST)
In Stock
Finder 90 250V ac DIN Rail Relay Socket, for use with 60.12
  • RS Stock No. 253-4044
  • Mfr. Part No. 90.26SMA
Each
SGD6.85(exc. GST)
In Stock
Sensata Crydom CW Series Solid State Relay, 50 A rms Load, Panel Mount, 660 V ac Load, 32 V Control
  • RS Stock No. 491-4931
  • Mfr. Part No. CWD4850-10
Each
SGD135.32(exc. GST)
In Stock
PR Electronics 5115A Series Programmable Signal Conditioner, Current, RTD, Thermocouple, Voltage Input, Current,
  • RS Stock No. 827-5489
  • Mfr. Part No. 5115A
Each
SGD1,262.86(exc. GST)
In Stock
Finder Voltage Monitoring Relay, 3 Phase, SPDT, 300 → 480V ac
  • RS Stock No. 789-2746
  • Mfr. Part No. 70.41.8.400.2030
Each
SGD152.97(exc. GST)
In Stock
RS PRO DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, CO
  • RS Stock No. 896-6813
Each
SGD80.50(exc. GST)
Temporarily out of stock
GIC DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, SPDT
  • RS Stock No. 818-4572
  • Mfr. Part No. 1CJDT0
Each
SGD61.59(exc. GST)
In Stock
TE Connectivity 2071566 8 Pin 250V DIN Rail Relay Socket, for use with Relay
  • RS Stock No. 272-7709
  • Mfr. Part No. 2071566-4
Each (In a Box of 10)
SGD5.356(exc. GST)
In Stock
TE Connectivity Power Relay, 24V dc Coil, 7.5A Switching Current, DPDT
  • RS Stock No. 783-0338
  • Mfr. Part No. R10-E1W2-V700
Each
SGD65.82(exc. GST)
In Stock
Better World
Schneider Electric Plug In Power Relay, 24V dc Coil, 10A Switching Current, 3PDT
  • RS Stock No. 884-1509
  • Mfr. Part No. RXM3AB2BD
Each
SGD17.61(exc. GST)
In Stock
Eaton Phase, Voltage Monitoring Relay, 200 → 500V ac, DIN Rail
  • RS Stock No. 179-3516
  • Mfr. Part No. 184789 EMR6-F500-G-1
Each
SGD212.59(exc. GST)
In Stock
Better World
Schneider Electric PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 742-3766
  • Mfr. Part No. RSB2A080BD
Each
SGD13.66(exc. GST)
In Stock
Sensata Crydom Solid State Relay, 50 A rms Load, Surface Mount, 280 V ac Load, 32 V dc Control
  • RS Stock No. 346-687
  • Mfr. Part No. D2450
Each
SGD101.30(exc. GST)
In Stock
RS PRO Solid State Interface Relay, 30 Vdc Control, 100 mAdc Load, DIN Rail Mount
  • RS Stock No. 905-4277
Each
SGD49.86(exc. GST)
In Stock
Siemens SIRIUS 3SK1 Safety Relay 110 → 240V ac/dc
  • RS Stock No. 784-5881
  • Mfr. Part No. 3SK1230-1AW20
Each
SGD381.66(exc. GST)
In Stock
TE Connectivity PCB Mount Non-Latching Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS Stock No. 376-751
  • Mfr. Part No. RP3SL012
Each
SGD19.12(exc. GST)
In Stock
Releco Plug In Power Relay, 24V dc Coil, 10A Switching Current, 3PDT
  • RS Stock No. 345-965
  • Mfr. Part No. C3-A30X / DC 24 V
Each
SGD39.50(exc. GST)
In Stock
Weidmuller ACT20M Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24V dc Supply, ATEX
  • RS Stock No. 892-8959
  • Mfr. Part No. 1176010000
Each
SGD258.96(exc. GST)
In Stock
Better World
Schneider Electric PCB Mount Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 179-7323
  • Mfr. Part No. RSL1AB4BD
Each
SGD17.29(exc. GST)
In Stock
Weidmuller Panel Mount Power Relay, 115V ac Coil, 4PDT
  • RS Stock No. 892-8928
  • Mfr. Part No. 7760056085
Each
SGD12.65(exc. GST)
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