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Title:
Combined Tubular Metal Oxide Varistor and Gas Discharge Tube
Document Type and Number:
WIPO Patent Application WO/2019/144257
Kind Code:
A1
Abstract:
Provided herein are protection devices having a tubular ceramic part and a tubular metal oxide varistor (MOV) electrically coupled in series or parallel. In some embodiments, the tubular ceramic part is connected between a first electrode and a second electrode, and the tubular MOV is connected between the second electrode and a third electrode. In some embodiments, the tubular ceramic part and the tubular MOV have a same or similar shape and/or outer circumference. The protection device further includes an enclosure surrounding the tubular ceramic part and the tubular MOV, wherein the first electrode, the second electrode, and the third electrode each have leads extending outside the enclosure. In some embodiments, the tubular MOV includes a central cavity aligned with a central cavity of the tubular ceramic part, wherein the central cavity of the tubular MOV and the central cavity of the tubular ceramic part contain an inert gas.

Inventors:
SHU, Xia (Nanfang Industrial Park, Dongfang Road Beice Humen Tow, Dongguan Guangdong 5, 523925, CN)
TANG, Hailang (Nanfang Industrial Park, Dongfang Road Beice Humen Tow, Dongguan Guangdong 5, 523925, CN)
XIAO, Yanjing (Nanfang Industrial Park, Dongfang Road Beice Humen Tow, Dongguan Guangdong 5, 523925, CN)
Application Number:
CN2018/073735
Publication Date:
August 01, 2019
Filing Date:
January 23, 2018
Export Citation:
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Assignee:
DONGGUAN LITTELFUSE ELECTRONICS CO., LTD. (Nanfang Industrial Park, Beizha Humen Tow, Dongguan Guangdong 5, 523925, CN)
International Classes:
H02H9/04
Domestic Patent References:
WO2014063362A12014-05-01
Foreign References:
US4527215A1985-07-02
US20170221613A12017-08-03
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (8th Floor, Vantone New World Plaza2 Fuchengmenwai Street, Xicheng District, Beijing 7, 100037, CN)
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