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

17717 Products showing for Relays & Signal Conditioning

53 of 886
Omron H3DS Series DIN Rail Mount Timer Relay, 24 → 230V ac, 1-Contact, 0.1 s to 120 h, SPDT
  • RS stock no. 365-6993
  • Mfr. Part No. H3DS-SL AC/DC
Each
R 1,100.51(exc. VAT)
Durakool Plug In Automotive Relay, 12V dc Coil Voltage, 40A Switching Current, SPDT
  • RS stock no. 915-6641
  • Mfr. Part No. DG82-2011-36-1012-DR
Each
R 72.19(exc. VAT)
Omron Plug In Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
  • RS stock no. 536-906
  • Mfr. Part No. MKS3PI-5 230VAC
Each
R 294.04(exc. VAT)
Schneider Electric Current Monitoring Relay
  • RS stock no. 247-1908
  • Mfr. Part No. 56193
Each
R 9,217.27(exc. VAT)
Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS stock no. 828-7328
  • Mfr. Part No. LY2N 24VDC
Each
R 480.65(exc. VAT)
Finder 50 Series 50 Safety Relay 24V 4 Safety Contacts
  • RS stock no. 494-866
  • Mfr. Part No. 50.14.9.024.4220
Each
R 340.91(exc. VAT)
Weidmuller Panel Mount Power Relay, 115V ac Coil, 4PDT
  • RS stock no. 892-8921
  • Mfr. Part No. 7760056103
Each
R 202.02(exc. VAT)
Better World
Schneider Electric Plug In Power Relay, 120V ac Coil, 8A Switching Current, 4PDT
  • RS stock no. 884-1329
  • Mfr. Part No. RXM4AB2F7
Each
R 220.72(exc. VAT)
Better World
Schneider Electric Harmony Control Series Panel Mount Relay Heatsink for Use with Panel Mount Solid State Relay
  • RS stock no. 922-2111
  • Mfr. Part No. SSRHP05
Each
R 1,785.08(exc. VAT)
RS PRO 1 Channel Intrinsically Safe Isolator, Temperature Converter, Trip Amplifier, Temperature Input, Voltage Output,
  • RS stock no. 329-096
Each
R 10,760.42(exc. VAT)
Celduc SO Series Solid State Relay, 35 A Load, Chassis Mount, 280 Vrms Load, 32 Vdc Control
  • RS stock no. 270-0057
  • Mfr. Part No. SO943460
Each
R 955.98(exc. VAT)
RS PRO PCB Mount Latching Power Relay, 12V dc Coil, 50A Switching Current, SPST
  • RS stock no. 476-577
Each
R 275.83(exc. VAT)
Schmersal PROTECT SRB SRB 202CA 2 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 2 Safety Contacts
  • RS stock no. 741-8669
  • Mfr. Part No. SRB202CA/QT 24VDC
Each
R 12,754.66(exc. VAT)
i-Autoc KSI Series Solid State Relay, 80 A Load, Panel Mount, 280 V ac Load, 32 V dc Control
  • RS stock no. 903-2977
  • Mfr. Part No. KSI240D80-L
Each
R 824.00(exc. VAT)
Better World
Schneider Electric Plug In Power Relay, 120V ac Coil, 10A Switching Current, 3PDT
  • RS stock no. 884-1480
  • Mfr. Part No. RXM3AB1F7
Each
R 190.55(exc. VAT)
TE Connectivity Panel Mount Power Relay, 12V dc Coil, 100mA Switching Current, SPDT
  • RS stock no. 267-4950
  • Mfr. Part No. 6-1393236-8
Each
R 172.40(exc. VAT)
Phoenix Contact PCB Mount Power Relay, 24V dc Coil, 16A Switching Current, SPDT
  • RS stock no. 507-9972
  • Mfr. Part No. 2961312
Each
R 187.90(exc. VAT)
Releco CT2-A Series Plug In Timer Relay, 90 → 150V ac/dc, 0.2 → 30 min, 0.2 → 30s, 1-Function
  • RS stock no. 459-4391
  • Mfr. Part No. CT2-A30 / M
Each
R 2,709.19(exc. VAT)
Siemens Current Monitoring Relay, Panel Mount
  • RS stock no. 275-1761
  • Mfr. Part No. 7SR4503-1HA20-1AA0
Each
R 33,166.46(exc. VAT)
ABB CR-S Series Interface Relay, DIN Rail Mount, 230V ac/dc Coil, SPDT, 6A Load
  • RS stock no. 231-9478
  • Mfr. Part No. 1SVR405541R7110 CR-S230VADC1CRS
Each
R 509.38(exc. VAT)
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