A relay is an essential electrical component used in a wide range of applications, from household appliances to industrial systems. It serves as an electrically operated switch that allows a low voltage signal to control a high voltage circuit. One crucial aspect of a relay’s operation is the relay voltage, which refers to the voltage applied to the relay coil to activate it. In this article, we will explore the concept of relay voltage, its significance, and how to choose the right voltage for your relay to ensure optimal performance.
What is Relay Voltage? Relay voltage is the electrical voltage required to energize the coil inside a relay. This voltage triggers the electromagnetic field that causes the relay’s contacts to open or close, depending on the relay’s configuration. It is important to note that relay voltage refers specifically to the coil voltage, not the voltage that is controlled by the relay’s switching contacts. The contacts are designed to handle the load voltage, which is usually much higher than the coil voltage. Relays come in a variety of voltage ratings, and the most common values are 5V, 12V, and 24V DC for direct current (DC) relays and 110V or 220V AC for alternating current (AC) relays. The voltage rating of the relay is usually printed on the component itself and must be matched with the control circuit to ensure proper operation.