What is a latching relay?

Magnetic latching relay is a kind of relay that uses the magnetic force of permanent magnet steel to maintain the contact state. It only needs to input a certain width of forward or reverse DC pulse at both ends of the coil to realize the attraction or release of the contact. The coil needs to be powered all the time.

Magnetic latching relays have the following advantages:

• Power saving, because the coil does not need to be energized all the time, only pulse excitation is required.
• The performance is stable because the contact state is not disturbed by the external magnetic field.
• Small size, strong load capacity, can switch large current circuits.
• Long mechanical life due to low number of contact transitions.

There are two types of magnetic latching relays: single-phase and three-phase, and are commonly used in IC card prepaid meters, centralized meter reading systems, reactive power compensation devices, smart homes, new energy and other fields.