What is a latching relay and when is it used?

A latching relay is a bistable relay that retains its switching state even if the supply voltage is interrupted. This means that the last selected switching position - whether switched on or off - remains reliably stored until the relay is deliberately switched over.

A latching relay is used wherever the switching status must be retained after a power failure or interruption. This means that installations or systems can continue to operate safely and stably after an interruption without having to reset the status.

The most important advantages include high energy efficiency and operational reliability. Energy is only required during the changeover, but not to maintain the status. At the same time, the ability to maintain the switching state even in the event of a loss of voltage provides additional reliability and protection against unwanted changes in operation.