Invention Grant
- Patent Title: Reflowable circuit protection device
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Application No.: US13567784Application Date: 2012-08-06
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Publication No.: US09620318B2Publication Date: 2017-04-11
- Inventor: Martyn A. Matthiesen , Jianhua Chen , Matthew P. Galla , Anthony Vranicar , Wayne Montoya , Christopher Pasma
- Applicant: Martyn A. Matthiesen , Jianhua Chen , Matthew P. Galla , Anthony Vranicar , Wayne Montoya , Christopher Pasma
- Applicant Address: US IL Chicago
- Assignee: Littlefuse, Inc.
- Current Assignee: Littlefuse, Inc.
- Current Assignee Address: US IL Chicago
- Main IPC: H01H37/76
- IPC: H01H37/76

Abstract:
A circuit protection device includes a substrate with first and second electrodes connected to the circuit to be protected. The circuit protection device also includes a heater element. A sensing element facilitates an electrical connection between the first and second electrodes. A flux material is provided around the sensing element. In a preferred embodiment, the flux contains a first component that is a polar material and a second component that is a non-polar material. A spring element exerts a force on the sensing element. The sensing element resists the force applied by the spring element. Upon detection of an activation, or fault, condition, the sensing element loses resilience and no longer resists the force exerted by the spring element, resulting in the spring element severing the electrical connection between the first and second electrodes. The flux allows the spring element to sever the electrical connection without dragging the sensing element.
Public/Granted literature
- US20130200984A1 Reflowable Circuit Protection Device Public/Granted day:2013-08-08
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