ceramic fuse tube

Ceramic Fuse Tube

Definition

A ceramic fuse tube is a core circuit protection component with high-strength insulation, high-temperature resistance and excellent arc-extinguishing performance, widely used in medium-high voltage, large-current and harsh working conditions.

Key Specifications & Features

1. Material

The main body is typically made of alumina ceramic (Al₂O₃ content 50%–95%), with higher alumina content delivering better mechanical strength and heat resistance. The inner wall is often filled with quartz sand to enhance arc extinguishing, and the end caps are generally nickel-plated brass.

2. Advantages

Superior insulation; heat resistance over 1000℃ with good thermal shock resistance; high mechanical strength to withstand arc pressure; moisture and corrosion resistance; much stronger breaking capacity than glass fuse tubes.

3. Common Specifications

Standard sizes: 5×20mm, 6×30mm, 10×38mm; rated voltage: 250V–1000V; rated current: 0.1A–100A; available in fast-acting and slow-blow types, complying with UL/CSA/IEC standards.

4. Application Scenarios

Industrial power supplies, UPS systems, new energy vehicles, frequency converters, three-phase systems and high-voltage equipment, suitable for large-current.