Illustrations of several shapes of chip fuses

With the continuous development of electronic products, chip fuses have been widely used as an important component to protect circuit safety. SMD fuses are not only compact in size and easy to install, but they can also effectively prevent circuit overloads and short circuits and protect the normal operation of equipment. This article will introduce several common shapes of chip fuses in detail, and help readers understand their structural characteristics and application scenarios more intuitively through diagrams.

Chip fuses are usually rectangular, but their shapes and sizes vary depending on application requirements. Common shapes include rectangular, round, square and specially designed special-shaped chip fuses. The design of these shapes not only affects how they are installed, but also their current carrying capacity and heat dissipation efficiency.

Rectangular is the most common chip fuse shape and is often standardized in size to facilitate automated production and installation. The rectangular fuse has metal terminals on both ends and is fixed to the circuit board by soldering. Its structure is simple and suitable for most electronic products. Figure 1 shows the typical appearance and internal fuse structure of a rectangular chip fuse.

Circular chip fuses are more suitable for circuit designs with limited space than rectangular ones. Its circular design makes the heat distribution more even and can maintain better stability in high temperature environments. Figure 2 is the appearance and cross-sectional view of a circular chip fuse, showing its internal fuse structure and endpoint connection method.

Square chip fuses are generally more compact in size than rectangular ones and are suitable for the protection of micro electronic devices. Its terminal designs are diverse and can adapt to different welding processes. Figure 3 shows the shape and typical packaging method of a square chip fuse, making it easier for designers to choose the appropriate model according to circuit requirements.

For special application requirements, some manufacturers have designed special-shaped chip fuses, such as oval, flat, etc. This type of fuse can better adapt to special circuit board layouts and improve space utilization. Figure 4 shows the appearance of several special-shaped chip fuses and their installation diagram.

Different shapes of chip fuses also have different packaging materials. Common ones include ceramic, plastic and glass packaging. The packaging material not only affects the temperature resistance of the fuse, but also is related to its mechanical strength and electrical insulation properties. Figure 5 details the structural characteristics of several packaging materials and their application scenarios.

Selecting an appropriately shaped chip fuse requires consideration of factors such as current specifications, size restrictions, heat dissipation, and installation process. Reasonable selection can effectively improve the safety and reliability of the circuit. This article helps designers quickly understand the advantages and applicable conditions of various shapes through diagrams.

As an electronic protection component, chip fuses have diverse shapes to meet the needs of different circuit designs. Rectangular, round, square and special-shaped chip fuses have their own characteristics, and designers should make reasonable choices based on specific application scenarios. Through shape illustrations, this article not only helps readers intuitively understand the structure of chip fuses, but also provides a reference for actual selection. With the continuous advancement of electronic technology, the shape and performance of chip fuses will continue to be optimized to protect the safety of electronic products.