understanding bistable relay： a game changer in power efficiency and automation
Release time:2025-11-18 20:54:14
A bistable relay, also known as a latching relay, is a type of relay that operates with two stable states： one that is energized and the other de-energized. Unlike traditional relays, which require continuous power to maintain a specific state, bistable relays only require a short pulse of electricity to switch between these two states. After the initial pulse, they will remain in the set state without consuming any further power. This unique feature makes bistable relays highly efficient and ideal for use in applications where power conservation is critical.
How a Bistable Relay Works
The bistable relay has two stable states： one in which the relay is in a normally open position, and the other where it is in a normally closed position. These states are achieved by using a mechanism that keeps the relay in one state without continuous power. The relay can be toggled between these states with the application of a pulse of current. Once the relay switches to a new state, it remains in that state until another pulse changes it.
The basic components of a bistable relay include a coil, a spring-loaded armature, and a set of contacts. When a pulse is applied to the coil, the magnetic field generated causes the armature to move, altering the position of the contacts. This motion either closes or opens the relay's contacts, depending on the current direction. After the pulse, the magnetic force is no longer needed to maintain the armature’s position, as it is held mechanically by the spring.
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