The bistable relay is a revolutionary component in the field of electronics, offering an efficient, low-power alternative to traditional relays. It operates with two stable states, retaining its configuration until an external signal prompts it to change. This unique feature sets it apart from conventional relays, which require continuous power to maintain their state. This article explores the working principle, advantages, and applications of bistable relays, shedding light on why they have become a popular choice in various industries.

What is a Bistable Relay? A bistable relay, also known as a latching relay, is an electromechanical device that has two stable states： one representing an “on” state and the other representing an “off” state. Unlike traditional relays that require a continuous supply of power to maintain a state, bistable relays only require a pulse or short signal to toggle between these states. Once the relay switches to one state, it remains in that state even after the signal is removed, which greatly reduces power consumption. This unique functionality allows bistable relays to provide the same switching abilities as conventional relays but with much lower energy requirements. The bistable relay essentially “remembers” its last state and will only change upon receiving an appropriate control signal.