Invention Grant
- Patent Title: PTC device with integrated fuses for high current operation
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Application No.: US17538067Application Date: 2021-11-30
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Publication No.: US11501942B2Publication Date: 2022-11-15
- Inventor: Yuriy Borisovich Matus , Martin G. Pineda
- Applicant: Littelfuse, Inc.
- Applicant Address: US IL Chicago
- Assignee: Littelfuse, Inc.
- Current Assignee: Littelfuse, Inc.
- Current Assignee Address: US IL Chicago
- Agency: KDB Firm PLLC
- Main IPC: H01H85/02
- IPC: H01H85/02 ; H01C7/02 ; H01H85/20 ; H01H85/055

Abstract:
A circuit protection device including a PTC device having a PTC element, first and second electrodes disposed on opposing first and second surfaces of the PTC element, respectively, first and second chip fuses disposed on the first and second electrodes, respectively, the second chip fuse electrically connected in series with the PTC device, and the first chip fuse electrically in connected parallel with the PTC device and the second chip fuse, the first chip fuse having a lower electrical resistance than the PTC element when the PTC element is in a non-tripped state, wherein a fusible element of the first chip fuse has a first melting temperature and is configured to carry a current higher than the PTC element can carry without tripping, and wherein a fusible element of the second chip fuse has a second melting temperature that is greater than the first melting temperature.
Public/Granted literature
- US20220293384A1 PTC DEVICE WITH INTEGRATED FUSES FOR HIGH CURRENT OPERATION Public/Granted day:2022-09-15
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