Relays are crucial components in a wide range of electrical and electronic applications, serving as electrically operated switches. The effectiveness and reliability of a relay in any system depend heavily on its specifications. Understanding relay specifications is vital for selecting the appropriate relay for a specific task. In this article, we will explore the key specifications of relays, their importance, and how they influence the performance and longevity of the relay in various applications.
1. Coil Voltage (Control Voltage) The coil voltage is one of the most fundamental specifications of a relay. It refers to the voltage that is applied to the coil of the relay to activate it. Relays can be classified into two categories based on their coil voltage： Direct Current (DC) and Alternating Current (AC) relays. The coil voltage determines the control circuit’s power requirements and plays a significant role in the relay’s operational efficiency. For example, if the coil voltage is too low, the relay may not activate reliably, while excessive voltage may cause overheating or damage.