Unveiling the difference between monostable relay and magnetic latching relay

There is another bistable type of electromagnetic relay, the magnetic latching relay, which differs from the monostable relay in that a permanent magnet is added to the structure (Figure 2), and after the coil is de-energized, the contacts remain in the same state as when the coil was energized. Only when the next reverse current is passed will the contact be converted to another state.

	(Figure 1)		(Figure 2)