The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2015
Filed:
May. 19, 2014
Fu Hua Chu, Taipei, TW;
Yi an Sha, New Taipei, TW;
En Tien Yang, Zhubei, TW;
Tong Cheng Tsai, Tainan, TW;
Fu Hua Chu, Taipei, TW;
Yi An Sha, New Taipei, TW;
En Tien Yang, Zhubei, TW;
Tong Cheng Tsai, Tainan, TW;
POLYTRONICS TECHNOLOGY CORP., Hsinchu, TW;
Abstract
A radial-leaded over-current protection device includes a PTC device, first and second electrode leads and an insulating encapsulation layer. The PTC device has first and a second conductive layers and a PTC material layer therebetween. The PTC material layer has a resistivity less than 0.18 Ω-cm and includes crystalline polymer and conductive ceramic filler. The ceramic filler has a resistivity less than 500 Ω-cm and is 35-65% by volume of the PTC material layer. The first electrode lead has an end connecting to the first conductive layer, whereas the second electrode lead has an end connecting to the second conductive layer. The insulating encapsulation layer wraps the PTC device and the ends of the conductive layers. The radial-leaded over-current protection device at 25° C. has a value of hold current thereof divided by an area of the PTC device ranging from 0.027-0.3A/mm. Each electrode lead has a cross-sectional area of at least 0.16 mm.