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

27 of 887
RS PRO Panel Mount Timer Relay, 240V ac, 2-Contact, 0.1 s → 999min, 2-Function, 1NO/1NC
  • RS stock no. 434-508
Each
R 428.89(exc. VAT)
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 30A Switching Current, DPDT
  • RS stock no. 745-6034
  • Mfr. Part No. 5-1393211-4
Each
R 530.72(exc. VAT)
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 10A Load
  • RS stock no. 203-5191
  • Mfr. Part No. RXG12BDPV
Each
R 418.10(exc. VAT)
Omron PCB Mount Non-Latching Relay, 48V dc Coil, 3A Switching Current, DPDT
  • RS stock no. 233-4134
  • Mfr. Part No. G2R-2 DC48
Each
R 92.24(exc. VAT)
Allen Bradley 193-ECM Series Interface Module
  • RS stock no. 220-8979
  • Mfr. Part No. 193-ECM-PCM
Each
R 1,338.70(exc. VAT)
RS PRO Signal Conditioner, Current Input, Relay Output, 115V ac Supply
  • RS stock no. 466-2286
Each
R 2,459.22(exc. VAT)
Finder 4C Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
  • RS stock no. 154-362
  • Mfr. Part No. 4C.02.9.024.0050SPA
Each
R 518.05(exc. VAT)
Sensata Crydom M SERIES Series Interface Relay Module, PCB Mount, 5V dc Coil, 20mA Load
  • RS stock no. 730-672
  • Mfr. Part No. OAC5A
Each
R 907.46(exc. VAT)
TE Connectivity PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS stock no. 680-3739P
  • Mfr. Part No. RT314012
Each (Supplied in a Box)
R 88.68(exc. VAT)
Sensata Crydom DRA Series Solid State Interface Relay, 32 V Control, 3 A rms Load, DIN Rail Mount
  • RS stock no. 701-8613
  • Mfr. Part No. DRA1-MP240D3
Each
R 1,420.78(exc. VAT)
Allen Bradley 700-FEA Series DIN Rail Mount Timer Relay, 2-Contact, 0.1 to 10h, SPDT
  • RS stock no. 265-781
  • Mfr. Part No. 700-FEA6TU23
Each
R 1,512.71(exc. VAT)
Siemens Current Monitoring Relay, DIN Rail
  • RS stock no. 275-1996
  • Mfr. Part No. 7SR1003-1JA20-2CA0
Each
R 27,310.88(exc. VAT)
Omron G7SA 14 Pin 24V dc DIN Rail Relay Socket, for use with G7SA Series
  • RS stock no. 548-016
  • Mfr. Part No. P7SA-14F-ND 24VDC
Each
R 727.00(exc. VAT)
Fujitsu PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS stock no. 790-3325
  • Mfr. Part No. FTR-F3AA024E-HA
Each
R 32.79(exc. VAT)
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 10A Load
  • RS stock no. 203-5252
  • Mfr. Part No. RXG13BDPV
Each
R 379.55(exc. VAT)
Finder Level Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS stock no. 776-1594
  • Mfr. Part No. 72.01.9.024.0000
Each
R 1,916.11(exc. VAT)
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 25 A Load, Panel Mount, 150 V dc Load, 32 V dc Control
  • RS stock no. 904-5762
  • Mfr. Part No. SSP1D425BD
Each
R 1,471.09(exc. VAT)
Wieland safeRELAY SNO 4062 1 Auxiliary Contacts Safety Relay 24V ac/dc, Dual-Channel 2 Safety Contacts
  • RS stock no. 321-9049
  • Mfr. Part No. SNO 4062K-A-00C
Each
R 5,248.13(exc. VAT)
Broyce Control DIN Rail Mount Timer Relay, 12 → 230V ac/dc, 1-Contact, 0.1 s → 100h, 1-Function, SPDT
  • RS stock no. 828-5155
  • Mfr. Part No. LEDO 12-230V AC/DC
Each
R 935.44(exc. VAT)
Siemens 3RP25 Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 1 s → 100h, SPDT
  • RS stock no. 831-6000
  • Mfr. Part No. 3RP2505-1AW30
Each
R 2,844.22(exc. VAT)
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