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

51 of 886
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 5A Load
  • RS stock no. 203-5224
  • Mfr. Part No. RXG21BDPV
Each
R 481.83(exc. VAT)
Better World
Schneider Electric Harmony Series Panel Mount Timer Relay, 110 → 230V ac/dc, 0.5 → 10s, 1-Function
  • RS stock no. 134-5390
  • Mfr. Part No. XB5DTGM2
Each
R 2,348.86(exc. VAT)
Better World
Schneider Electric Harmony Relay RXG 11 Pin <250V DIN Rail Relay Socket, for use with Relais Series RSZ
  • RS stock no. 884-1281
  • Mfr. Part No. RUZC3M
Each
R 138.95(exc. VAT)
Better World
Schneider Electric Harmony XPS/ Preventa XPS XPSU 8 Auxiliary Contacts Safety Relay 24V ac/dc, 3-Channel 7 Safety
  • RS stock no. 200-6135
  • Mfr. Part No. XPSUAT13A3AP
Each
R 9,895.82(exc. VAT)
Finder PCB Mount Power Relay, 5V dc Coil, 6A Switching Current, SPDT
  • RS stock no. 164-088
  • Mfr. Part No. 34.51.7.005.0010
Each
R 242.64(exc. VAT)
Omron PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPST
  • RS stock no. 683-9227
  • Mfr. Part No. G5RL-1A-E-HR DC12
Each
R 78.70(exc. VAT)
Releco CT3-A Series Plug In Timer Relay, 20 → 65V ac/dc, 0.2 → 30 min, 0.2 → 30s, 1-Function
  • RS stock no. 459-4420
  • Mfr. Part No. CT3-A30 / L
Each
R 2,744.93(exc. VAT)
Omron PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS stock no. 512-9342
  • Mfr. Part No. G6D-1A-ASI DC24
Each
R 73.00(exc. VAT)
Red Lion IAMS Series Signal Conditioner, Current, Linear Resistance, Potentiometer, RTD, Thermocouple, Voltage Input,
  • RS stock no. 276-9859
  • Mfr. Part No. IAMS0002
Each
R 6,622.24(exc. VAT)
Phoenix Contact MACX MCR Series Signal Conditioner, Current, Voltage Input, Current Output, 8 → 30V dc Supply,
  • RS stock no. 196-0434
  • Mfr. Part No. 2902063
Each
R 4,210.60(exc. VAT)
Omron G9SA 1 Auxiliary Contacts Safety Relay 24V ac/dc, Single/Dual-Channel 3 Safety Contacts
  • RS stock no. 549-609
  • Mfr. Part No. G9SA-301 AC/DC24
Each
R 5,581.04(exc. VAT)
Omron PCB Mount Power Relay, 24V dc Coil, 5A Switching Current, SPST-NC, SPST-NO
  • RS stock no. 218-2031
  • Mfr. Part No. G6B-2114P-US DC24
Each
R 180.14(exc. VAT)
Panasonic PhotoMOS Series Solid State Relay, 6 A Load, Surface Mount, 30 V Load
  • RS stock no. 205-6861
  • Mfr. Part No. AQV251GA
Each
R 114.35(exc. VAT)
Omron G2R 8 Pin 250V ac DIN Rail Relay Socket, for use with G2R-2-S Series General Purpose Relay, H3RN Series Timer,
  • RS stock no. 111-3067
  • Mfr. Part No. P2RF-08-PU
Each
R 177.67(exc. VAT)
ABB 1SVR Series DIN Rail Mount Timer Relay, 24V ac, 2-Contact, 0.3 → 30s, 1-Function, SPDT
  • RS stock no. 442-9398
  • Mfr. Part No. 1SVR550217R4100
Each
R 1,079.07(exc. VAT)
Siemens SIRIUS 3RQ3 Output Coupler with Plug-In Series Relay, 24V ac/dc Coil
  • RS stock no. 175-2333
  • Mfr. Part No. 3RQ3118-1AB00
Each
R 540.66(exc. VAT)
Finder Plug In Relay, 24V dc Coil, 7A Switching Current, 4PDT
  • RS stock no. 257-7392
  • Mfr. Part No. 553490245040
Each
R 457.68(exc. VAT)
Finder PCB Mount Relay, 12V dc Coil, 6A Switching Current, SPST-NO
  • RS stock no. 276-1192
  • Mfr. Part No. 32.21.7.012.4300
Each
R 125.84(exc. VAT)
Omron Plug In Power Relay, 24V ac Coil, 10A Switching Current, DPDT
  • RS stock no. 828-7315
  • Mfr. Part No. LY2N 24VAC
Each
R 480.35(exc. VAT)
Omron Panel Mount Power Relay, 24V dc Coil, 25A Switching Current, DPST
  • RS stock no. 329-963
  • Mfr. Part No. G7L-2A-T DC24
Each
R 266.34(exc. VAT)
Results per page
1
51
886

Related links