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

2 of 887
Phoenix Contact PLC-RSC-24DC/21 Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPDT, 1-Pole, 6A Load
  • RS stock no. 358-8301
  • Mfr. Part No. 2966171
Each
R 252.21(exc. VAT)
RS PRO Signal Conditioner, Current Input, Current Output
  • RS stock no. 794-8577
Each
R 4,716.71(exc. VAT)
RS PRO Panel Mount Timer Relay, 220V ac, 2-Contact, 0.1 s → 300h, DPDT
  • RS stock no. 179-2920
Each
R 1,307.87(exc. VAT)
Omron Plug In Power Relay, 24V dc Coil, 6A Switching Current, 4PDT
  • RS stock no. 271-1934
  • Mfr. Part No. MY4-GS-R DC24
Each
R 230.65(exc. VAT)
Durakool Plug In Automotive Relay, 12V dc Coil Voltage, 30A Switching Current, SPST
  • RS stock no. 915-6626
  • Mfr. Part No. DG20-7021-35-1012
Each
R 31.03(exc. VAT)
Better World
Schneider Electric Harmony Relay RXG 8 Pin <250V DIN Rail Relay Socket, for use with Relais Series RSZ
  • RS stock no. 884-1284
  • Mfr. Part No. RUZC2M
Each
R 130.49(exc. VAT)
Better World
Schneider Electric Harmony Relay RSL Series Relay Socket, Plug In, 24V dc Coil, SPDT
  • RS stock no. 179-7331
  • Mfr. Part No. RSLZVA1
Each
R 367.26(exc. VAT)
Leuze MSI-SR4B Safety Relay 24V 1 Safety Contacts
  • RS stock no. 616-439
  • Mfr. Part No. MSI-SR4B-01
Each
R 4,943.61(exc. VAT)
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 6 A Load, DIN Rail Mount, 100 V dc Load, 32 V dc Control
  • RS stock no. 922-1981
  • Mfr. Part No. SSM1D36BD
Each
R 949.65(exc. VAT)
RS PRO 5 A NE/ND Loads 20 Auxiliary Contacts Safety Relay 24V dc, Single Channel 4 Safety Contacts
  • RS stock no. 329-098
Each
R 3,662.73(exc. VAT)
Omron Plug In Power Relay, DPST
  • RS stock no. 818-4263
  • Mfr. Part No. G7L-2A-TUB 200/240VAC
Each
R 562.56(exc. VAT)
Durakool Plug In Power Relay, 24V dc Coil, 60A Switching Current, SPDT
  • RS stock no. 915-6688
  • Mfr. Part No. DG85F-7011-76-1024-DR
Each
R 95.78(exc. VAT)
Better World
Schneider Electric Harmony XPS/ Preventa XPS XPSU 4 Auxiliary Contacts Safety Relay 24V ac/dc, Single Channel 5 Safety
  • RS stock no. 201-1494
  • Mfr. Part No. XPSUEP14AP
Each
R 4,720.49(exc. VAT)
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 V dc, 24 → 240V ac, 2-Contact, 0.1 s
  • RS stock no. 791-2723
  • Mfr. Part No. RE17RCMU
Each
R 1,299.51(exc. VAT)
Durakool Plug In Power Relay, 12V dc Coil, SPST
  • RS stock no. 915-6679
  • Mfr. Part No. DG85C-7021-76-1012-R
Each
R 90.34(exc. VAT)
Siemens 3RP25 Series DIN Rail Mount Timer Relay, 12 → 240V dc, 1-Contact, 0.05 s → 100h, 1-Function, SPDT
  • RS stock no. 831-6041
  • Mfr. Part No. 3RP2535-1AW30
Each
R 2,346.03(exc. VAT)
Better World
Schneider Electric Harmony XPS/ Preventa XPS XPSU 4 Auxiliary Contacts Safety Relay 24V ac/dc, Single Channel 5 Safety
  • RS stock no. 201-1493
  • Mfr. Part No. XPSUEP14AC
Each
R 4,524.89(exc. VAT)
Omron Plug In Latching Power Relay, 220 → 240V ac Coil, 6A Switching Current, 4PDT
  • RS stock no. 271-1942
  • Mfr. Part No. MY4IN-GS-R AC220/240
Each
R 274.70(exc. VAT)
RS PRO Earth Leakage Relay, 45 → 65Hz Frequency, Analogue Output
  • RS stock no. 603-239
Each
R 1,750.23(exc. VAT)
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 2-Contact, 0.05 → 1s,
  • RS stock no. 897-6703
  • Mfr. Part No. RE22R2CMR
Each
R 2,213.62(exc. VAT)
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