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

85 of 859
In Stock
Omron PCB Mount Power Relay, 12V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 686-7086
  • Mfr. Part No. G2RL-14-E-CF DC12
Each
SGD5.23(exc. GST)
In Stock
Pepperl + Fuchs 2 Channel Zener Barrier, ATEX
  • RS Stock No. 793-4294
  • Mfr. Part No. Z896
Each
SGD215.68(exc. GST)
In Stock
Crouzet Syr-Line Series Panel Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.001 → 9.999 s, 0.01
  • RS Stock No. 166-3811
  • Mfr. Part No. MDA2R10MV2
Each
SGD352.32(exc. GST)
Limited stock
Better World
Schneider Electric Pluggable Function Module, Diode for use with RPZ Series Relay Sockets, RXZ Series Relay Sockets
  • RS Stock No. 884-1262
  • Mfr. Part No. RXM040W
Each
SGD5.96(exc. GST)
In Stock
Siemens SIRIUS 3SK1 Safety Relay 24V dc, Single Channel
  • RS Stock No. 784-5835
  • Mfr. Part No. 3SK1122-2CB41
Each
SGD586.78(exc. GST)
In Stock
Pepperl + Fuchs 2 Channel Zener Barrier, ATEX
  • RS Stock No. 793-4281
  • Mfr. Part No. Z764
Each
SGD152.87(exc. GST)
Temporarily out of stock
Schneider Electric Current Monitoring Relay, SPST, 110 → 130V ac, DIN Rail
  • RS Stock No. 339-318
  • Mfr. Part No. 56506
Each
SGD947.54(exc. GST)
In Stock
Eaton DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05 s → 60h, 1-Function, SPDT
  • RS Stock No. 225-8267
  • Mfr. Part No. 031882 ETR4-11-A
Each
SGD228.48(exc. GST)
In Stock
Phoenix Contact 1 Channel Galvanic Barrier, Repeater power supply, Current Input, Current Output, ATEX
  • RS Stock No. 709-9644
  • Mfr. Part No. 2924016
Each
SGD308.50(exc. GST)
In Stock
Better World
Schneider Electric Surface Mount Power Relay, 24V dc Coil, 1A Switching Current, DPDT
  • RS Stock No. 610-0544
  • Mfr. Part No. ABR7S21
Each
SGD17.72(exc. GST)
In Stock
Sensata Crydom SeriesOne DR Series DIN Rail Mount Timer Relay, 12 → 24V ac/dc, 2-Contact, 0.1 s → 100h,
  • RS Stock No. 144-5920
  • Mfr. Part No. DRTA06D06
Each
SGD130.45(exc. GST)
In Stock
Sensata Crydom DRC Series Series Solid State Relay, 7.6 A Load, DIN Rail Mount
  • RS Stock No. 822-9350
  • Mfr. Part No. DRC3P48D400R2
Each
SGD100.70(exc. GST)
In Stock
GIC Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24V dc Supply
  • RS Stock No. 884-2458
  • Mfr. Part No. 2SC3D11CC3
Each
SGD192.89(exc. GST)
In Stock
Omron Surface Mount Power Relay, 24 Vdc Coil, 5A Switching Current, DPDT
  • RS Stock No. 192-482
  • Mfr. Part No. MY4Z DC24
Each
SGD25.21(exc. GST)
In Stock
Omron G2R 5 Pin 250V ac PCB Mount Relay Socket, for use with 1 Pole G2R Series
  • RS Stock No. 353-950
  • Mfr. Part No. P2R-05P
Each
SGD3.64(exc. GST)
In Stock
Dold Safemaster BD 5987 Safety Relay 230V ac, Dual-Channel 2 Safety Contacts
  • RS Stock No. 240-8743
  • Mfr. Part No. BD5987.02/001 AC50/60Hz 230V
Each
SGD727.22(exc. GST)
Temporarily out of stock
Dold Coupling Device, AC 690V / DC 1000 V, DIN Rail
  • RS Stock No. 338-999
  • Mfr. Part No. RP5898/61
Each
SGD413.46(exc. GST)
In Stock
ABB CR-P DIN Rail Relay Socket, for use with CR-P Interface Relay
  • RS Stock No. 231-9510
  • Mfr. Part No. 1SVR405650R1000 CR-PSS
Each
SGD9.33(exc. GST)
In Stock
Omron OBSOLETE 8 Pin Chassis Mount Relay Socket, for use with Relay
  • RS Stock No. 266-287
  • Mfr. Part No. US-08
Each
SGD3.86(exc. GST)
In Stock
Celduc SCC Series Solid State Relay, 5 A Load, Panel Mount, 60 V dc Load, 32 V dc Control
  • RS Stock No. 917-2696
  • Mfr. Part No. SCC20506
Each
SGD120.78(exc. GST)
1
85
859
Results per page

Related links