Bistable relays, also known as latching relays or memory relays, have become increasingly popular in various electronic and electrical systems due to their unique properties and applications. Unlike traditional relays, which require continuous power to maintain their state, bistable relays have two stable states that they can latch into, significantly reducing power consumption. This characteristic makes them an ideal choice for applications where energy efficiency is a priority. In this article, we will explore the workings, advantages, and applications of bistable relays in modern technology.

What is a Bistable Relay? A bistable relay is a type of relay that has two stable states： “on” and “off,” which it can switch between without the need for continuous power. Once the relay has been switched to one of these states, it will remain there until it is intentionally toggled to the other state. Unlike conventional relays that rely on a constant supply of current to maintain their position, a bistable relay only requires power during the switching process. This characteristic is why bistable relays are often called “latching” relays, as they “latch” into one of their two stable positions until the next toggle.