Complete Classification of Disposable Fuses

As the core component of circuit protection, disposable fuses are classified into six dimensions: packaging form, current range, voltage level, material type, melting speed, and special functions. The following is a detailed classification and characteristic analysis:
1、 Classified by packaging form
Surface mount (SMD)
Specifications: such as 0603, 1206, 2410, etc., using surface mount technology (SMT).
Features: Small size, suitable for portable devices with limited space (such as mobile phones and smartwatches); Support automated production with high cost-effectiveness.
Applications: Consumer electronics, communication devices, automotive electronics.
Tube shaped (glass tube/ceramic tube)
Structure: Encapsulated in glass or ceramic tubes, with metal caps at both ends.
Features: Glass tube is transparent and easy to observe the melting state, ceramic tube is resistant to high temperature and high pressure, and resistant to vibration.
Applications: power adapters, switch mode power supplies, industrial controls.
Insert type (fork bolt type)
Structure: Knife shaped insert design, directly inserted into the fuse holder.
Features: Easy to install, suitable for high current scenarios (such as automotive circuits).
Applications: automotive electronics, marine equipment, industrial motors.
Square patch type
Structure: Ceramic tube/end cap structure, compliant with RoHS standards.
Features: Resistant to thermal and mechanical shock, high reliability.
Application: New energy vehicle battery management system, high-end server power supply.
2、 Classified by current range
Low current fuse
Range: 0.1A~30A (such as JFC2410TS series).
Features: Fast response to overload, protecting precision circuits.
Applications: electronic devices, LED lighting, small household appliances.
High current fuse
Range: up to 100A (such as Jidian JFC0456-3100).
Characteristics: Capable of withstanding transient high currents and high breaking capacity (such as...) 1KA@32V  DC）。
Applications: New energy vehicles, telecommunications base stations, blockchain servers.
3、 Classified by voltage level
Low voltage fuse
Range: DC 12V~125V, AC 125V (such as Huade 0603F 500mA).
Features: Suitable for low-voltage scenarios such as consumer electronics and automotive electronics.
Applications: laptops, digital cameras, car chargers.
high voltage fuse
Scope: Supports higher voltages (such as JFC0456-3100 with breaking capacity up to) 500A@72V  DC）。
Features: Resistant to high voltage impact and high safety.
Application: Industrial power supply, photovoltaic inverter.
4、 Classified by material type
lead-antimony alloy
Features: Low melting point, fast melting, low cost.
Application: Household appliances (rice cookers, electric fans).
Copper/Tin Bismuth Alloy
Characteristics: Good conductivity, precise melting current.
Application: Precision instruments, medical equipment.
ceramic materials
Features: High stability, high temperature resistance, and good long-term reliability.
Application: Aerospace, military equipment.
5、 Classified by melting speed
Quick break type (instantaneous break type)
Response time: milliseconds (e.g< 10ms@10 Times the rated current).
Features: Prevent short-circuit transient impact and protect sensitive components.
Applications: IC circuits, power adapters.
Slow break type (delay type)
Response time: seconds (e.g< 5s@2 Times the rated current).
Characteristic: Can withstand brief overloads (such as motor starting current).
Applications: Air conditioning compressors, industrial motors.
6、 Classified by special functions
Anti pulse type
Characteristics: Able to withstand surge currents during power on (such as transient overload during motor start-up).
Application: Motor drive, power module.
High reliability type
Certification: UL/CSA certified, compliant with RoHS standards.
Features: Low failure rate, long lifespan.
Applications: Industrial control, medical equipment, rail transit.
The classification system of disposable fuses covers the full range of needs from micro consumer electronics to high-end industrial applications. Users can choose the appropriate type based on circuit characteristics (such as current, voltage, space limitations), environmental conditions (such as temperature, vibration), and protection requirements (such as response speed, reliability). For example, plug-in or square patch fuses are preferred for automotive electronics, while industrial power supplies require high current and high voltage fuses to ensure safety.