What are general purpose relays?

General purpose relays, or mechanical relays, are electric switches that open and close in line with an input signal, such as a voltage or current, which is applied to a coil. These devices can have input terminals for single or multiple control signals and sets of operating contact terminals. Essentially relays convert small electrical input into larger currents.

A major advantage of general purpose relays is that they are economical, helping reduce system costs.

Types of general purpose relays

Some different types of general purpose relays include:

• Control relays
• Latching relays
• I/O relays
• High capacity relays for DC loads
• High capacity relays for AC loads
• Ratchet relays

Where are general purpose relays used?

You can find general purpose relays at use across a wide range of applications, including:

• Plants
• Industrial machinery
• Scientific equipment
• Communications and measurement equipment
• OA devices
• Home electrical appliances