OVERVOLTAGE PROTECTION AND ELECTRONIC CIRCUIT COMPRISING SUCH A DEVICE

摘要

The invention relates to an overvoltage protection device, comprising at least one input (21), for connection to an electric power supply network, at least one outlet (22), for connection to an electric circuit for protection, overvoltage limitation means (10, 25) between the input and the outputs to protect said electronic circuit against overvoltages which may be applied to the inputs. The overvoltage limitation means comprise bi-directional serial electronic limitation means (26), comprising at least two inputs/outputs (27), connected in series to at least one of said inputs (21) and controlling a low drop in voltage (VN) when a circulating current is less than a limiting current value (Ilm) and limiting said circulating current and increasing a drop in voltage between said inputs/outputs (27).