A Technical Guide to Latching Relays
General Latching relays are classified as mechanical and magnetic latching systems. It uses a magnetic H-armature system with the magnets inset into the high grade plastic of the H-armature. Rotation of the H-armature round its anchor point allows a short switching time and it is not sensitive to vibration of shock Compared to mono-stable relay, a latching relay only requires power to change the contact position, with the obvious advantages. No power consumption in the hold position. No additional heating caused by the driving coil. Maintenance of the contact position in case of power failure. Higher contact force and lower operating power. High resistance to vibration and shock § § Figure 1: Driving a double coil polarized latching relay § How to control § The driving coils of the latching relays are equipped with three connectors (centre-tap-ped). This enables the user to choose betwee...