Relays

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.
Relaterte Produkter
Cynergy 3 reed relays have high isolation voltages. ...
Description:
Cynergy 3 reed relays have high isolation voltages. These are ideal for applications such as cardiac defibrillators, test equipment and high voltage power supplies. Low contact resistance10kV ot 15kV isolationMinimum insulation resistance 1 x 1014 ΩPCB or flying leads connections. ...
The UL approved reed relays have very high ...
Description:
The UL approved reed relays have very high isolation voltages. UL reed relays are ideal for applications that require high reliability, these include cardiac defibrillators, test equipment and high voltage power supplies. 10kV isolationLow contact resistancePanel mount or PCBHV connections ...
The UL approved reed relays have very high ...
Description:
The UL approved reed relays have very high isolation voltages. UL reed relays are ideal for applications that require high reliability, these include cardiac defibrillators, test equipment and high voltage power supplies. 10kV isolationLow contact resistancePanel mount or PCBHV connections ...
Miniature reed relay in a single-in-line (SIL) package ...
Description:
Miniature reed relay in a single-in-line (SIL) package with a choice of normally open or data switching contacts capable of switching up to 200Vdc at 10W. Available with 5V, 12V and 24V coils and has external magnetic shield and diode-suppressed ...