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

18170 Products showing for Relays & Signal Conditioning

7 of 909
Phoenix Contact 3118 Series Signal Conditioner, NPN, PNP Input, Current Output, 24V Supply
  • RS Stock No. 249-5309
  • Mfr. Part No. 2943437
Each
Kr. 492,30(exc. VAT)
Phoenix Contact PSM-ME Series Signal Conditioner, RS-485 Input, RS-485 Output, 24V ac/dc Supply, ATEX
  • RS Stock No. 370-7669
  • Mfr. Part No. 2744429
Each
Kr. 3 963,27(exc. VAT)
ABB R600 Series Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT, 6A Load
  • RS Stock No. 232-0313
  • Mfr. Part No. 1SNA645073R0000 R600-RB121-12VDC
Each
Kr. 361,88(exc. VAT)
Finder Plug In Power Relay, 12V dc Coil, 7A Switching Current, 4PDT
  • RS Stock No. 776-1660
  • Mfr. Part No. 55.34.9.012.0074
Each
Kr. 126,07(exc. VAT)
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 680-3849P
  • Mfr. Part No. RT424024
Each (Supplied in a Box)
Kr. 56,09(exc. VAT)
Weidmüller ACT20P Series Signal Converter, Current Input, Current Output, 30V Supply, ATEX, IECEx
  • RS Stock No. 287-5326
  • Mfr. Part No. 7760054122
Each
Kr. 1 766,68(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
Kr. 50,15(exc. VAT)
Better World
Schneider Electric Harmony Relay RXM 8 Pin <250V DIN Rail Relay Socket, for use with Relais Series RSZ
  • RS Stock No. 884-1297
  • Mfr. Part No. RXZE2S108M
Each
Kr. 73,79(exc. VAT)
Finder PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 351-588
  • Mfr. Part No. 40.52.7.024.0000
Each
Kr. 65,89(exc. VAT)
Omron Voltage Monitoring Relay, 1 Phase, SPDT, 20 → 200V ac/dc
  • RS Stock No. 819-3298
  • Mfr. Part No. K8AK-VS3 24VAC/DC
Each
Kr. 1 368,55(exc. VAT)
Pilz PNOZsigma PNOZ s4 1 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 3 Safety Contacts
  • RS Stock No. 156-106
  • Mfr. Part No. 750104
Each
Kr. 3 061,45(exc. VAT)
Celduc SUL8-SUM8 Series Solid State Relay, 23 A Load, Panel Mount, 275 V ac Load, 32 V dc Control
  • RS Stock No. 685-0974
  • Mfr. Part No. SUL842070
Each
Kr. 706,99(exc. VAT)
Finder 94 14 Pin 250V ac Screw Fitting Relay Socket, for use with 55.34, 85.04, 55.32 Series Relay
  • RS Stock No. 400-9146
  • Mfr. Part No. 94.04SMA
Each
Kr. 78,02(exc. VAT)
Coupatan Panel Mount Timer Relay, 250V ac, 0 → 120min, DPDT
  • RS Stock No. 536-2779
Each
Kr. 541,79(exc. VAT)
Phoenix Contact RIF Series Interface Relay, DIN Rail Mount, 24V dc Coil, 4PDT, 4-Pole
  • RS Stock No. 794-3686
  • Mfr. Part No. 2903308
Each
Kr. 158,30(exc. VAT)
Phoenix Contact PLC-RPT- 24DC/21-21 Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
  • RS Stock No. 801-8444
  • Mfr. Part No. 2900330
Each
Kr. 226,47(exc. VAT)
Finder PCB Mount Power Relay, 12V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 182-9776
  • Mfr. Part No. 40.52.9.012.0000
Each
Kr. 65,89(exc. VAT)
Finder Switch Box Monostable Relay, 12V ac Coil, 12A Switching Current, SPST-NO
  • RS Stock No. 800-2798
  • Mfr. Part No. 13.31.8.012.4300
Each
Kr. 286,57(exc. VAT)
Carlo Gavazzi Plug In Power Relay, 230V ac Coil, 5A Switching Current, 4PDT
  • RS Stock No. 859-3254
  • Mfr. Part No. RMIA45230AC
Each
Kr. 101,10(exc. VAT)
Omron G9SE 1 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 4 Safety Contacts
  • RS Stock No. 890-3382
  • Mfr. Part No. G9SE-401 DC24
Each
Kr. 1 857,39(exc. VAT)
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