Relay current plays a critical role in the operation of relays, which are widely used in electrical and electronic systems to control higher power circuits with a low-power signal. This article explores the concept of relay current, discussing its different types, applications, and factors to consider when choosing and utilizing relays in various systems.

What is Relay Current? Relay current can refer to the current passing through different parts of a relay. A relay is an electromagnetic switch that uses a small input signal to control the switching of a larger output signal. In this context, relay current can be divided into two primary types: coil current (the current that flows through the relay’s coil to activate it) and contact current (the current passing through the relay’s contact points when it is engaged). Both types of current are essential for the relay to perform its function of controlling a larger circuit with a smaller control signal.