understanding latching relays： an efficient solution for power-saving and control

Latching relays are an essential component in many electronic and electrical systems, providing a unique solution for maintaining control over switches without the need for continuous power. Unlike traditional relays, which require a constant electrical current to stay in a particular position, latching relays only need a pulse of energy to change their state, after which they maintain that state until another pulse is applied. This distinct feature makes latching relays highly efficient in terms of energy consumption and reliability.

What is a Latching Relay? A latching relay, sometimes referred to as a “memory relay,” is a type of relay that holds its switching state without requiring continuous current. It operates on the principle of magnetic latching, where an electromagnetic mechanism or a mechanical latch is used to lock the relay’s position once it is activated. There are two main types of latching relays： Single-stable (Mono-stable)： In this configuration, the relay changes to one state (either on or off) when a pulse is applied and remains in that state until the opposite pulse is received. Dual-stable (Bi-stable)： In this design, the relay has two stable states, and the pulse toggles the relay between these two positions.