Patent ID: 9147509
Filing Date: 2015-09-29
Classification: H01C

Abstract:
1. A radial-leaded over-current protection device, comprising: a PTC device comprising a first conductive layer, a second conductive layer and a PTC material layer sandwiched between the first and second conductive layers, the PTC material layer having a resistivity less than 0.18 Ω-cm, and comprising crystalline polymer and conductive ceramic filler dispersed therein; the conductive ceramic filler has a resistivity less than 500μΩ-cm and comprises 35% to 65% by volume of the PTC material layer; a first electrode lead of which one end connects to the first conductive layer; a second electrode lead of which one end connects to the second conductive layer; and an insulating encapsulation layer wrapping the PTC device and the ends of the first and second electrode leads connecting to the PTC device; wherein the radial-leaded over-current protection device has a resistance less than 100 mΩ, and the radial-leaded over-current protection device, at 25° C., indicates that hold current thereof divided by an area of the PTC device is in the range of 0.027-0.3 A/mm wherein each of the first and second electrode leads has a cross-sectional area of at least 0.16 mm