There are three main types of fuses, namely current fuses, temperature fuses and resettable fuses. The following is a detailed introduction to these three types of fuses
1. Current fuses
Current fuses are the most common type of fuses. Their main function is to automatically fuse to cut off the circuit when the current in the circuit exceeds the rated value, thereby protecting the circuit and equipment from faults such as overload or short circuit. Current fuses have a variety of specifications and forms, such as chip fuses, micro fuses, plug-in fuses and tubular fuses, etc., to meet the needs of different circuits and equipment.
Chip fuses: With a small size, they are suitable for providing secondary protection in space-constrained application environments, such as handheld portable electronic devices and instruments.
Micro fuses: Similar to chip fuses, they also use thin film technology to precisely control electrical characteristics and are suitable for occasions that require precise protection.
Plug-in fuses: They are quite common in automotive applications, sometimes also called fork bolt fuses, which are easy to install and replace.
Tubular fuses: They are very common in switching power supplies and various power supply applications, and can withstand large current shocks.
2. Temperature Fuse
The temperature fuse is a non-recoverable one-time thermal protection device. Its main function is to automatically fuse to cut off the circuit when the temperature in the circuit or equipment exceeds the preset value, thereby preventing fire or equipment damage caused by overheating. The temperature fuse has the characteristics of exquisite structure, good sealing, sensitive and reliable action temperature, etc.
RH square temperature fuse: the appearance is a plastic square shell, and the interior is made of low melting point alloy material, which is suitable for occasions requiring square appearance and higher melting temperature.
RP resistance temperature fuse: the main material is usually a low melting point alloy, presenting a specific shape, suitable for occasions requiring precise control of the melting temperature.
RY metal shell temperature fuse: the shell is made of metal material, and the interior is filled with organic chemical heat-sensitive body, which has excellent induction sensitivity and action accuracy, and is widely used in various electrical appliances such as rice cookers, hair dryers, and motors.
3. Self-resetting fuse
The self-resetting fuse is a type of fuse that can automatically recover when the current is too large and the circuit is open. It is a fuse that can be used multiple times. Its main feature is that it can quickly fuse to cut off the circuit when overloaded, and can automatically return to normal state after the fault is eliminated without replacement. Resettable fuses are suitable for occasions that require frequent overload protection, such as computer power supplies, communication equipment, etc.
Plug-in resettable fuse: compact design, easy to install, can be easily integrated into various circuit systems.
Laminated resettable fuse: more efficient heat conduction and current limitation are achieved through the laminated structure, suitable for occasions that require higher protection performance.
SMD resettable fuse: with a compact design, it is suitable for various circuit systems and can effectively reduce operation and maintenance costs.
The three types of fuses have their own characteristics and applicable occasions. When choosing, you should consider the specific circuit and equipment requirements.