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From April 15 to 19, 2025, the 137th China Import and Export Fair (Canton Fair) opened grandly in Zhuhai, Guangzhou. As a leading manufacturer of circuit protection equipment, Zhejiang Zhenghao Fuse brought a variety of high-performance fuses and intelligent solutions to the booth number: [15.2J0102] to empower the power safety field with innovative technology, attracting high attention from merchants at home and abroad.

As the scale of domestic photovoltaic installations continues to expand, the demand for DC side circuit protection has increased significantly. Recently, a number of photovoltaic equipment manufacturers have released technical white papers on the application conditions of DC fuses, emphasizing that product selection needs to comprehensively consider environmental adaptability, electrical parameter matching and long-term reliability, which has aroused heated discussions in the industry.

In the booming photovoltaic industry, various advanced technologies continue to emerge, providing a strong impetus for the use of clean energy. Behind these technologies, there is a seemingly inconspicuous but crucial "little role" - photovoltaic DC fuse, which is silently guarding the safe and stable operation of the photovoltaic system.

Choose a suitable fuse ‌: When choosing a fuse, you should choose an appropriate current rating according to actual needs. Usually, the fuse's fusing current is set to 1.5 to 2.0 times its rated current. For example, when the total power of household appliances exceeds 1100 watts, a 5-ampere fuse can be selected.

The material selection of fuses is directly related to their protection performance. Low melting point alloys (such as lead-antimony alloys) are the most commonly used core materials, while glass, ceramics, aluminum alloys and organic composite materials provide diversified solutions according to specific application scenarios.

The working principle of fuse is mainly based on the thermal effect of current and the physical properties of metal conductor expansion due to heat.