OVERCURRENT PROTECTION CIRCUIT

The invention relates to an overcurrent protection circuit, used for protecting devices, apparatuses or electronic equipments. According to the invention, the protection circuit comprises a solenoid (S) serially inserted in a circuit which connects a consumer (C) to a voltage supply source (SA), connected to a normally interrupted reed contact (CT), which is situated inside the solenoid (S) and which, if the intensity of the current absorbed by the consumer (C) exceeds the maximum admissible value, generates an increase of the magnetic field produced by the solenoid (S), in which situation the reed contact (CT) is closed and, by means of a resistor (R5), it generates the polarization with a positive voltage of a control electrode of a thyristor (T), it is switched into the conduction state and, as it is connected, through a resistor (R2) and a diode (D), to the control electrode of a junction transistor (T2), it generates a low voltage drop on a resistor (R4) in the load circuit of the junction transistor (T2), determining the blockage of a field-effect transistor (T1), which cuts-outs the supply of the consumer (C).