A three-terminal fuse and method of manufacture

By improving the flux layer and electrode paste in the three-terminal fuse, using microcrystalline wax powder and sodium dodecyl sulfonate to enhance weather resistance, and using polyaniline and ceramic powder to improve conductivity and heat insulation, the problem of excessively long melting time was solved, achieving rapid melting and improved cost-effectiveness.

CN117238732BActive Publication Date: 2026-06-12SHENZHEN VICTORS IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN VICTORS IND CO LTD
Filing Date
2023-09-22
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing three-terminal fuses have a long melting time under overcurrent or overvoltage conditions, and there is a lack of improvements to the electrodes or fluxes that are directly connected to the fusible metal wires to shorten the melting time.

⚗Method used

Improvements were made to the three-terminal fuse by introducing a flux layer and an electrode paste. The flux layer contains microcrystalline wax powder and sodium dodecyl sulfonate to enhance weather resistance and moisture resistance. Polyaniline and ceramic powder were added to the electrode paste to improve conductivity and heat insulation.

🎯Benefits of technology

It shortens the melting time of fusible metal sheets, improves the melting reaction speed in humid environments, enhances the conductivity and heat insulation of electrodes, and reduces raw material costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of circuit protection elements, and discloses a three-terminal fuse and a preparation method. The three-terminal fuse comprises a substrate, electrodes and a heating resistor on the substrate, the electrodes are prepared from conductive paste, a fusible metal sheet is arranged on the heating resistor, and a flux layer is coated on the upper surface of the fusible metal sheet. The flux layer comprises rosin, microcrystalline paraffin powder, fusible metal powder and sodium dodecyl sulfonate; and the conductive paste comprises micron silver powder, graphite powder, polyaniline, ceramic powder, dimethyl sulfoxide and organic resin. The preparation method of the three-terminal fuse comprises the following steps: (1) preparation of the flux and the conductive paste; (2) preparation of the substrate, the heating resistor and the fusible metal sheet; and (3) synthesis of the three-terminal fuse. The three-terminal fuse prepared by the application has a short melting time, a longer service life, a low production cost and is suitable for wide use in circuits.
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