understanding the latching relay： key features and applications
Release time:2025-11-13 06:20:00
Latching relays, also known as bistable relays, are a unique type of relay used widely in electrical and electronic systems. Unlike traditional relays that require continuous power to maintain their switching state, latching relays can maintain their state indefinitely without needing a constant supply of electrical current. This characteristic makes them highly energy-efficient and valuable in applications where power conservation and reliability are crucial.
What is a Latching Relay?
A latching relay is an electromechanical switch that maintains its position (either open or closed) until it is triggered by an external signal to change its state. It consists of two main components： a permanent magnet and a set of mechanical contacts. There are typically two coils, each serving a different purpose： one coil sets the relay to a specific state (usually "on" or "closed"), and the other resets it to the opposite state (usually "off" or "open").
The defining feature of a latching relay is its ability to hold its state without needing continuous power. After the relay is switched, it stays in the new position until it receives a signal to change again. This is particularly useful in applications where power conservation is important or where a relay needs to remain in a specific position for extended periods, even in the absence of power.
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