Welding Fuse Copper Pipe End Caps
Welding Fuse Copper Pipe End Caps are mainly used in high-current fuses, tubular connectors, power electronic modules, and new energy DC systems, serving a triple function of conductive sealing, mechanical fixation, and welding transition.
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Product Introduction

Welding Fuse Copper Pipe End Caps are core components in fuse systems for new energy and power electronics. Belonging to the category of welded caps, they are primarily used for sealing, conducting electricity, and protecting the copper pipe ends of fuses, achieving the dual functions of pipe sealing and circuit continuity. They are a crucial foundational component ensuring the stable overload and short-circuit protection performance of fuses. The product features a dual-structure design with inner and outer caps, adaptable to various specifications of copper pipes, and can be directly welded to the fuse body. They are widely used in circuit protection modules for new energy vehicles, energy storage systems, photovoltaic inverters, wind power converters, and low-voltage electrical equipment, perfectly meeting the standardized selection requirements of engineering procurement and the core demands of system engineers for component compatibility and reliability.
Material characteristics
High-Purity Material
Utilizing T2/T3 high-purity copper (copper content ≥99.9%), impurities such as titanium and phosphorus are removed, meeting the requirements of high-voltage circuits in new energy applications. With a density of 8.96 g/cm³ and a melting point of 1083℃, its excellent electrical and thermal conductivity allows for rapid heat conduction through the fuse, reducing losses and ensuring long-term stable operation.
Process Compatibility
The surface undergoes precision polishing, eliminating oxidation and scratches, providing a solid foundation for welding. Copper itself has excellent weld compatibility, seamlessly adapting to laser welding, resistance welding, and other processes. Welded seams are strong, preventing incomplete welds and ensuring both sealing and conductivity meet standards for Copper Cap for BS(British Standard) Type Fuse.
Corrosion and Durability
The high-purity copper used exhibits excellent corrosion resistance, showing no oxidation or cracking under complex outdoor and automotive conditions. Third-party material testing reports ensure the Copper Cap for Cylindrical Fuses material meets engineering selection standards, matching the long-term use requirements of new energy equipment and guaranteeing product durability.

Welding details
Weld width is strictly controlled within the standard range, with a deviation of ≤0.1mm. There are no defects such as incomplete welds, missed welds, or porosity. The welded joints undergo 100% X-ray or ultrasonic testing, and the qualification level is consistent with the equipment housing, ensuring that the weld strength meets the requirements for new energy fuses.
Seamlessly adaptable to various processes such as laser welding and resistance welding. Welding temperature and current can be flexibly adjusted according to customer production line parameters. No secondary grinding is required after welding; the Copper Outer Cap for Eaton Bussmann Fuse can be directly used for assembly, effectively improving the batch assembly efficiency of new energy equipment.
Precise control of weld sealing during welding, combined with the product's double-cap design, forms a tight protective barrier after welding, preventing dust and moisture from entering the fuse, avoiding short-circuit faults, and ensuring the long-term stable operation of the fuse system.

Our team
We have a strong team to support us. Our technical backbone comes from Xiamen Hongfa Group, a state-owned listed company (the world's number one in the relay and switch industry). They have more than 30 years of experience in the electrical industry. They can not only produce qualified Welding Fuse Copper Pipe End Caps, but also provide customers with cost reduction and efficiency improvement solutions and the latest industry technologies. They can help customers optimize their selection and reduce procurement and usage costs.

Contact Us
If you have any questions or customization needs during the engineering procurement and technology selection process, please feel free to contact us. We will provide you with professional Welding Fuse Copper Pipe End Caps product solutions and technical support to help your project progress smoothly.
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