Relays & Signal Conditioning

We stock a large choice of relay 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 from trusted brands 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 is operated electronically to turn on or off current within an electric circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, the main difference is that 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 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 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's feature semiconductor switching elements, typically thyristors, triacs and diodes that transmits and energises 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.
Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17728 Products showing for Relays & Signal Conditioning

32 of 887
In Stock
Broyce Control Phase Monitoring Relay, 3 Phase, 320 → 490V ac, DIN Rail
  • RS stock no. 206-1444
  • Mfr. Part No. LPPI
Each
R 1,218.67(exc. VAT)
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac, 4-Contact, 0.1 s → 100h,
  • RS stock no. 872-5820
  • Mfr. Part No. RE22R2MXMU
Each
R 1,918.49(exc. VAT)
In Stock
Schneider Electric Safety Relay 250V ac 8
  • RS stock no. 276-8893
  • Mfr. Part No. MTN6805-0008
Each
R 3,730.30(exc. VAT)
Temporarily out of stock
Omron G3VM Series Solid State Relay, 1 A Load, Surface Mount, 40 V Load, 1.5 V Control
  • RS stock no. 683-9012
  • Mfr. Part No. G3VM-41GR8
Each
R 150.76(exc. VAT)
In Stock
RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS stock no. 102-6131
Each
R 1,444.00(exc. VAT)
In Stock
Omron MY2 8 Pin 250V ac DIN Rail Relay Socket, for use with MY Series General Purpose Relay
  • RS stock no. 111-3062
  • Mfr. Part No. PYF-08-PU
Each
R 138.52(exc. VAT)
Last RS stock
Schneider Electric 14 Pin <250V DIN Rail Relay Socket, for use with Relais Series RSZ
  • RS stock no. 884-1672
  • Mfr. Part No. RXZE2S114S
Each
R 155.08(exc. VAT)
Temporarily out of stock
ABB Current Monitoring Relay, 1 Phase, DPDT, DIN Rail
  • RS stock no. 775-8009
  • Mfr. Part No. 1SVR730841R0500 CM-SRS.22S
Each
R 4,136.15(exc. VAT)
In Stock
Finder DIN Rail Latching Modular Step Relay, 24V dc Coil, 16A Switching Current, DPST
  • RS stock no. 159-773
  • Mfr. Part No. 20.28.9.024.0000
Each
R 782.10(exc. VAT)
In Stock
ABB Temperature Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS stock no. 876-4995
  • Mfr. Part No. 1SVR730700R2100 CM-MSS.13S
Each
R 1,728.52(exc. VAT)
In Stock
Carlo Gavazzi DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 0.1 s → 100h, SPDT
  • RS stock no. 857-7539
  • Mfr. Part No. DMB51CW24
Each
R 1,368.99(exc. VAT)
Temporarily out of stock
Lovato DIN Rail Latching Latching Relay, 230V Coil, 20A Switching Current, SPDT
  • RS stock no. 276-5575
  • Mfr. Part No. CNB2011230
Each
R 1,342.01(exc. VAT)
In Stock
Hongfa Europe GMBH PCB Mount Power Relay, 3V dc Coil, 10A Switching Current, SPST
  • RS stock no. 176-2825
  • Mfr. Part No. HF46F-G/003-HS1F(610)
Each (In a Pack of 5)
R 30.75(exc. VAT)
Temporarily out of stock
Releco PCB Mount Power Relay, 110V dc Coil, 15A Switching Current, DPDT
  • RS stock no. 613-8044
  • Mfr. Part No. C12A21X110D
Each
R 490.56(exc. VAT)
Temporarily out of stock
Sifam Tinsley Earth Leakage Relay, 45 → 66Hz Frequency, 30 → 30000mA Leakage, 1NO + 1NC Output
  • RS stock no. 173-538
  • Mfr. Part No. ELR2-XXLBZ000000ST
Each
R 1,636.20(exc. VAT)
In Stock
Releco PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, DPDT
  • RS stock no. 613-8022
  • Mfr. Part No. C12A21X24D
Each
R 366.21(exc. VAT)
Limited stock
Omron H3CR Series DIN Rail, Panel Mount Timer Relay, 100 → 240V ac, 2-Contact, 0.05 s → 300 h,
  • RS stock no. 188-4584
  • Mfr. Part No. H3CR-F8 100-240VAC/100-125VDC
Each
R 2,650.32(exc. VAT)
In Stock
Omron MY2 8 Pin 250V ac DIN Rail Relay Socket, for use with Miniature Power Relays
  • RS stock no. 186-4179
  • Mfr. Part No. PYFZ-08-E
Each
R 107.69(exc. VAT)
In Stock
Red Lion IAMS Series Signal Conditioner, Current, Linear Resistance, Potentiometer, RTD, Thermocouple, Voltage Input,
  • RS stock no. 276-9860
  • Mfr. Part No. IAMS0020
Each
R 6,091.85(exc. VAT)
Temporarily out of stock
Finder Wall Mount Timer Relay, 250V, 1-Contact, 10s, SPDT
  • RS stock no. 249-4427
  • Mfr. Part No. 13.21.8.230.B000
Each
R 1,504.56(exc. VAT)
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