What type of relay has two de-energized states?

A latching relay is designed to maintain its last active state even after the control signal is removed. It has two de-energized states: one when it is in its original position and one in its latched position. When the relay is activated, it shifts into a latched state, and it will stay there until it receives a command to switch back. This unique feature allows the relay to hold its position without continuous power, which is particularly useful in applications requiring reduced power consumption or in maintaining the state of a circuit during power outages or to ensure memory functionality in control systems.

The other types of relays do not share this characteristic. A momentary relay is only active when the control signal is applied, returning to its default state immediately after. A standard relay functions similarly, typically moving to one active state upon energization and returning to a single de-energized position when the control signal is gone. A voltage relay operates based on specific voltage levels and serves specific applications, but it does not provide the dual de-energized conditions intrinsic to latching relays. This makes the latching relay distinctly capable of two stable states when not powered.