At its core, a relay is an electrically operated switch used to control a circuit. Relays work by using an electromagnet to open or close contacts in response to an input signal. In traditional relays, when the contacts close or open, the movement causes an interruption or establishment of electrical current, which can lead to an arc—essentially a small electrical spark that forms between the contacts. This arc can damage the contacts over time, causing performance degradation and shortening the relay’s lifespan.

    An arc-free relay, on the other hand, is designed to minimize or completely eliminate the occurrence of these arcs. This is typically achieved through the use of specialized contact materials, unique circuit designs, or additional components that suppress or direct the energy away from the contact points when the relay operates. The result is a more reliable and durable relay that can function for longer periods without degrading.