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:
Feb. 28, 2023
Filed:
Aug. 25, 2021
Polytronics Technology Corp., Hsinchu, TW;
Zhen Yu Dong, Tainan, TW;
Yung Hsien Chang, Douliu, TW;
Hsiu Che Yen, Taoyuan, TW;
Yao Te Chang, Yunlin County, TW;
Fu Hua Chu, Taipei, TW;
Takashi Hasunuma, Narita, JP;
POLYTRONICS TECHNOLOGY CORP., Hsinchu, TW;
Abstract
An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix and carbon black. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The carbon black is dispersed in the polymer matrix. A resistance jump Rof the over-current protection device at 16V/50 A by 1000 cycles is 0.80-1.20. A resistance jump Rof the over-current protection device at 25V/50 A by 1000 cycles is 0.90-1.30.