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

54 of 886
In Stock
Better World
Schneider Electric RXZ 4 Pin <250V DIN Rail Relay Socket, for use with Plug-In Relay 782H with 4 C/O Contact,
  • RS stock no. 884-1326
  • Mfr Part No. RXZE2M114M
Each
R 148.95(exc. VAT)
In Stock
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail Mount, 230V ac Coil, SPDT, 10A Load
  • RS stock no. 203-5223
  • Mfr Part No. RXG12P7PV
Each
R 551.40(exc. VAT)
Temporarily out of stock
Fujitsu Through Hole Signal Relay, 9V dc Coil, 1A Switching Current, SPDT
  • RS stock no. 195-8179
  • Mfr Part No. SY-9-K
Each
R 58.28(exc. VAT)
In Stock
Omron H3YN Series Panel Mount Timer Relay, 24V dc, 4-Contact, 0.1 s → 10min, DPDT
  • RS stock no. 106-6252
  • Mfr Part No. H3YN-2-B DC24
Each
R 1,096.53(exc. VAT)
In Stock
Fujitsu PCB Mount Power Relay, 12V dc Coil, 5A Switching Current, DPDT
  • RS stock no. 790-3319
  • Mfr Part No. FTR-F1CA012V
Each
R 50.93(exc. VAT)
In Stock
Finder 58 Series Interface Relay, DIN Rail Mount, 24V dc Coil, 4PDT, 4-Pole, 7A Load
  • RS stock no. 123-2844
  • Mfr Part No. 58.P4.9.024.0050SMA
Each
R 746.68(exc. VAT)
Temporarily out of stock
Finder DIN Rail Modular Step Relay, 24V ac Coil, 16A Switching Current, SPST-NO
  • RS stock no. 257-7345
  • Mfr Part No. 202180244000
Each
R 694.40(exc. VAT)
In Stock
Siemens SIRIUS 3SK1 Safety Relay 110 → 240V ac/dc, Single Channel 4 Safety Contacts
  • RS stock no. 784-5784
  • Mfr Part No. 3SK1111-1AW20
Each
R 4,097.29(exc. VAT)
In Stock
Omron PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS stock no. 213-2098
  • Mfr Part No. G2RL-24-CF DC24
Each
R 96.63(exc. VAT)
In Stock
Omron PCB Mount Power Relay, 5V dc Coil, 10A Switching Current, SPDT
  • RS stock no. 369-466
  • Mfr Part No. G5LE-1 DC5
Each
R 39.55(exc. VAT)
In Stock
Omron 2 Auxiliary Contacts Safety Relay 24V 2 Safety Contacts
  • RS stock no. 214-6824
  • Mfr Part No. G9SX-NSA222-T03-RT DC24
Each
R 10,342.67(exc. VAT)
In Stock
Lovato TM Series DIN Rail Mount Timer Relay, 24 → 240 V ac, 24 → 48V dc, 2-Contact, 0.1 s → 10min,
  • RS stock no. 905-3476
  • Mfr Part No. TMST
Each
R 2,220.92(exc. VAT)
In Stock
Turck Plug In Power Relay, 24V dc Coil, 5A Switching Current, 4PDT
  • RS stock no. 842-3824
  • Mfr Part No. C9-A41FX/024VDC
Each
R 923.99(exc. VAT)
In Stock
TE Connectivity PCB Mount Power Relay, 5V dc Coil, 16A Switching Current, SPDT
  • RS stock no. 680-3732
  • Mfr Part No. RT314005
Each
R 95.38(exc. VAT)
In Stock
TE Connectivity PCB Mount Non-Latching Relay, 230V ac Coil, 8A Switching Current, DPDT
  • RS stock no. 200-1926
  • Mfr Part No. RTE24730
Each
R 200.87(exc. VAT)
In Stock
ABB Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 300 → 500V ac, DIN Rail
  • RS stock no. 775-7895
  • Mfr Part No. 1SVR730794R3300 CM-PVS.41S
Each
R 5,057.10(exc. VAT)
In Stock
Celduc SUL9-SUM9 Series Solid State Relay, 25 A Load, DIN Rail Mount, 280 V ac Load, 32 V dc Control
  • RS stock no. 917-4844
  • Mfr Part No. SUL942460
Each
R 1,191.49(exc. VAT)
In Stock
Panasonic Plug-In Mount Non-Latching Relay, 24V dc Coil, 12.5mA Switching Current, DPDT
  • RS stock no. 247-4345
  • Mfr Part No. SP2-DC24V
Each
R 632.31(exc. VAT)
Currently unavailable
Weidmüller WAZ5 Series Limit Signal Transmitter, Current Input, Relay Output, 24V dc Supply
  • RS stock no. 287-5337
  • Mfr Part No. 8543880000
Each
R 4,121.73(exc. VAT)
In Stock
Eaton 3 Channel Zener Barrier, Intrinsic Safety Barrier, RTD, Thermocouple Input, ATEX
  • RS stock no. 612-5329
  • Mfr Part No. MTL7756AC/RS
Each
R 5,940.72(exc. VAT)
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