Relays are essential components in many electrical and electronic systems, serving as switches that enable the control of high-power circuits with low-power signals. They are widely used in applications such as automotive systems, home appliances, industrial automation, and communication devices. However, selecting the right relay for a specific application requires an understanding of the key relay parameters that determine its performance and reliability. In this article, we will explore the crucial relay parameters and explain their significance in the selection and application of relays.
1. Rated Voltage One of the most fundamental parameters of a relay is its rated voltage. This refers to the voltage required to activate the relay’s coil. Relays are available in both direct current (DC) and alternating current (AC) configurations, and the rated voltage will vary based on the type of relay and the voltage supply of the application. It’s important to choose a relay with a rated voltage that matches the available control signal voltage to ensure proper operation. Over-voltage or under-voltage conditions may cause the relay to malfunction or fail prematurely. 2. Coil Resistance