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Fuse elements and fuse devices

A fuse and component technology, applied in electrical components, emergency connection, emergency contact form, etc., can solve the problems of low current rating and poor fast breaking, and achieve the effect of increasing current rating, reducing conductor resistance, and excellent fast breaking.

Active Publication Date: 2019-04-19
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned conventional fuse element, the following problems have been pointed out: the surface mounting by reflow cannot be performed, the current rating is low, and when the rating is increased by increasing the size, the instant breaking performance is poor.

Method used

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  • Fuse elements and fuse devices

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Experimental program
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no. 1 approach

[0038] [Fuse device]

[0039] The fuse device 1 of the present invention is as figure 1 As shown, it is provided with: an insulating substrate 2, first and second electrodes 3, 4 provided on the insulating substrate 2, and installation between the first and second electrodes 3, 4, and self-heating due to the conduction of a current exceeding the rated current. The fuse element 5 is blown to cut off the current path between the first electrode 3 and the second electrode 4 .

[0040] The insulating substrate 2 is formed in a square shape by an insulating member such as alumina, glass ceramics, mullite, or zirconia, for example. In addition, as the insulating substrate 2 , materials used for printed wiring boards such as glass epoxy substrates and phenol substrates may be used.

[0041] First and second electrodes 3 and 4 are formed on opposite end portions of the insulating substrate. The first and second electrodes 3 and 4 are each formed of a conductive pattern such as Cu w...

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Abstract

Provided are a fuse element capable of surface mounting and capable of achieving both improved rating and fast blown performance, and a fuse device using the fuse element. In the fuse element (5) that constitutes the conduction path of the fuse device (1) and is fused by self-heating due to the current exceeding the rated current, there are: a low-melting-point metal layer (5a) and a layer laminated on the low-melting-point metal layer (5a ), the high-melting-point metal layer (5b) and the low-melting-point metal layer (5a) corrode the high-melting-point metal layer (5b) and fuse when energized.

Description

technical field [0001] The present invention relates to a fuse element and a fuse device which are mounted on a current path and cut off the current path by self-heating to fuse when a current exceeding the rated current flows, and particularly relate to a fuse element excellent in quick-break performance and insulation after blown out. superior fuse device. This application claims priority based on Japanese Patent Application No. Japanese Patent Application No. 2013-070306 filed on March 28, 2013 and Japanese Patent Application No. 2014-059135 filed on March 20, 2014 in Japan, and is hereby incorporated by reference These applications are used for this application. Background technique [0002] Conventionally, when a current exceeding a rated current flows, a fuse element is used that fuses by self-heating to cut off the current path. As the fuse element, for example, a holder-fixed fuse in which solder is sealed in a glass tube, a chip fuse in which an Ag electrode is pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H85/06H01H85/08H01H85/11
CPCH01H85/11H01H85/48H01H85/50H01H85/06H01H2207/02
Inventor 米田吉弘小森千智古田和隆宇都宫泰志
Owner DEXERIALS CORP
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