CIRCUIT PROTECTION DEVICE

摘要

The present invention discloses a circuit protection device containing a PTC chip (130) having a first electrode surface and a second electrode surface opposite to the first electrode surface; a diode chip (140) having a first electrode surface which is a cathode and a second electrode surface which is an anode opposite to the first electrode surface; and at least two substrates (111, 121), on surfaces of which three different conductors (112, 113, 122) and three different external terminals (1, 2, 3) corresponding to the three different conductors are formed. The PTC chip, the diode chip and the at least two substrates are laminated to each other. An insulation protection package is formed between the at least two substrates to cover the PTC chip and the diode chip. Three conductive vias (101, 102, 103) are formed in the at least two substrates and the insulation protection package to electrically connect the three different conductors to the corresponding three different external terminals. One electrode surface of the PTC chip and the first electrode surface of the diode chip both are electrically connected to one of the external terminals through one of the conductors and one of the vias, and the other electrode surface of the PTC chip and the second electrode surface of the diode chip, respectively, are electrically connected to the other two of the external terminals through the other two of the conductors and the other two of the vias.