Industrial Fuses: How Brass Fuse Caps Ensure Safety

Industrial fuses are essential protective parts in electrical systems. They stop current when there is overload or short circuit. This avoids equipment damage or fires. Brass fuse caps are the core parts of industrial fuses. They directly affect safety performance. Recently, new safety standards were implemented in new energy and manufacturing industries. Demand for high-quality brass components has surged. This article will explore how brass fuse caps guarantee safety from five aspects: safety mechanisms, industry trends, application fields, quality standards, and Xiamen APOLLO's solutions.

 

 

1. Excellent Electrical Conductivity​

Brass caps for fuses are made of high-purity brass (copper-zinc alloy). They have low electrical resistance. This ensures stable current transmission. According to GB/T 13539 tests, they keep consistent conductivity even after 8,000 hours of use. This reduces heat buildup. Heat buildup may cause malfunctions.​

 

2. Tight Structural Sealing​

Brass inner cap fits closely with the fuse tube. This structure stops dust and moisture from entering the fuse. It also blocks arc leakage when the fuse blows. This avoids secondary damage to the circuit. This design is widely used in high-voltage industrial scenes.​

 

3. High-Temperature Resistance​

Brass end piece undergoes special heat treatment. It can stand temperatures up to 150°C without deformation. In GB/T 9364.2-2018 tests, it keeps its shape for 1,200 hours at high temperatures. This ensures safety in harsh industrial environments.

 

 

1. In March 2025, Dongguan Xinhai Metal launched a new fuse brass cap with a quick-release structure. Workers can replace the cap without turning off power. This cuts maintenance downtime by 40%. It also improves on-site safety.​

 

2. The China Electrical Equipment Industry Association released a report in September 2024. It says inner end cap must meet strict dimensional accuracy (tolerance ≤0.03mm). This is to match new-generation fuses. It drives manufacturers to upgrade precision machining equipment.​

 

3. Since April 2025, the new GB38031-2025 standard for new energy vehicles has taken effect. It requires brass inner cap to resist electrochemical corrosion for over 5,000 charge-discharge cycles. This promotes the use of nickel-plated brass materials in the industry.

 

 

Brass fuse caps and supporting components are widely used in key industries. In new energy vehicle battery packs, fuse brass cap protects batteries from short-circuit damage during charging. In industrial control systems, inner end cap ensures stable operation of PLC equipment in dusty factories. In solar inverters, brass end piece resists ultraviolet radiation. This helps maintain long-term reliability. These applications show how brass components adapt to different safety needs through material and structural optimization.

 

 

1. Electrical Performance Testing​

According to GB/T 13539, brass caps for fuses must pass voltage drop tests. The voltage loss should be ≤50mV at rated current. This prevents overheating. They also need to go through 10,000 on-off cycle tests. This ensures stable conductivity.​

 

2. Environmental Adaptability Testing​

GB/T 9364.3-2018 requires brass end piece to pass vibration tests (10g acceleration). It also needs to pass temperature cycle tests (-40°C to 85°C). These tests check if the component stays intact during transportation and extreme working conditions.​

 

3. Safety Compliance Certification​

All qualified brass inner cap must get CQC certification. For export products, they also need to meet UL248 or IEC60127 standards. This dual certification ensures safe use in both domestic and international markets.​

 

4. Material Purity Testing​

The China National Institute of Metrology has requirements. Brass materials for fuse caps must have a purity of ≥99.5%. This ensures no harmful impurities during use. Harmful impurities could affect fuse performance.

 

 

Xiamen APOLLO makes high-performance brass components for industrial fuses. These include brass caps for fuses, brass inner cap, and custom inner end cap. Our brass caps for fuses use 99.7% high-purity brass. They undergo nickel-plating treatment. This enhances corrosion resistance by 50% compared to ordinary products. Dimensional tolerance is controlled within ±0.02mm. This ensures perfect compatibility with various fuse tubes.​

 

We hold ISO 9001:2015 and CQC certifications. Our products meet GB/T and IEC standards. We offer flexible shipping via sea, land, and air. For large batches, we use sea shipping (15-20 days). For urgent orders, we use air shipping (3-5 days). For domestic customers, we use land shipping (2-3 days). Our technical team provides customized services. They can develop special brass end piece or fuse brass cap according to customer drawings or samples. The development cycle is only 7-10 days. Choosing Xiamen APOLLO means getting safe, reliable, and tailor-made solutions for brass caps used in industrial fuses.