Latching / Bistable Relays

Zero Power Consumption

Standard (Monostable) relays require continuous current to the coil to keep the contacts closed. Latching (Bistable) relays use a permanent magnet biasing system.

How it Works

• Set (Close): A short voltage pulse creates a field that aids the permanent magnet, closing the reed. Once closed, the permanent magnet is strong enough to hold it closed *without power*.
• Reset (Open): A reverse polarity pulse creates a field that opposes the permanent magnet, releasing the reed.

This technology is critical for battery-powered instruments, as the relay consumes power only for the 2ms switching duration.