Double-contact-surface PTC overcurrent protection element

The invention relates to a double-contact-surface PTC overcurrent protection element. The element comprises at least two layers of PTC composite material sheets with a resistance positive temperature coefficient effect, at least two insulating material layers, terminal electrodes and at least two conductive holes for connecting different electrodes, The element is provided with the at least two layers of the PTC composite material sheets with the resistance positive temperature coefficient effect and the at least two conductive holes, the conductive holes are respectively connected with one end electrode and one conductive electrode of each PTC composite material sheet in the form of blind holes and/or through holes, and are electrically isolated from the other end electrode and the other conductive electrode of each PTC composite material sheet, so that the PTC composite material sheets are in a parallel connection state. The double-contact-surface PTC overcurrent protection element obtains low-resistance PT