Improved ESD protection circuit

An electro-static discharge protection circuit (205) including: a first input terminal (213) and a second input terminal (214); a first output terminal (221) coupled to the first input terminal, and a second output terminal (222) coupled to the second input terminal; a first circuital branch (210) connected between the first input terminal and the second input terminal, said first circuital branch including at least one first Zener (D5) diode having a cathode terminal and an anode terminal; a second circuital branch (215) connected between the first output terminal and the second output terminal, wherein the first circuital branch comprises a load element coupled between the second input terminal and the anode terminal of the at least one first Zener diode; the second circuital branch includes a first transistor (P2) having a control terminal adapted to receive a transistor control voltage, the first transistor being coupled to the load element so as to receive from the load element the transistor control voltage.