This section provides overview, applications, and principles of tube fuses. Also, please take a look at the list of 8 tube fuse manufacturers and their company rankings.
A tube fuse is a safety device for electrical equipment. It consists of a hollow cylinder with a metal fuse element inside.
It is called a tube fuse for its tube shape.
When an abnormal current flows in a circuit, the fuse element inside the tube heats up, melts, and interrupts the circuit, thereby protecting the circuit from the abnormal current.
In addition to tube fuses, there are other types of fuses, such as insertion-type fuses, surface-mount-type fuses, and fuses with claws.
Tube fuses are one of the oldest types of fuses and are used as safety devices against abnormal currents in consumer electrical equipment and electronic circuits for home appliances, telecommunications, and other applications.
In the automotive field, demand for fuses as safety devices is increasing due to the number of microcomputer-controlled components and electric vehicles. Blade fuses are currently the most widely used automotive fuses, but tube fuses are also used to protect auxiliary circuits for compressors, DCDC compressors, etc.
Tube fuses are classified according to their intended use as follows
These fuses have normal fusing characteristics. They are used in general consumer electrical equipment such as home appliances.
This type of fuse has a fuse element that blows quickly. The diameter of the element is partially narrow or spiral wound. These fuses are used to protect semiconductors in electronic circuits.
This type of fuse takes time for the fuse element to fuse. The element is made of a metal with high thermal capacity, which makes it difficult to generate heat and fuse even with a temporary overcurrent. These fuses are used in products such as motors that draw a large current when the power is turned on.
There are two types of tube fuses based on the tube material: glass tube fuses and ceramic tube fuses.
Glass tube fuses are the most common type of fuse. The fuse tube is made of transparent glass, which allows the fuse element inside to be visually observed. This makes various states of the fuse (such as blown) determinable from the outside.
Ceramic-tube fuses have a higher interrupting capacity than glass-tube fuses. Both glass and ceramic tube fuses are available with an arc-quenching agent sealed inside the tube to suppress the arc discharge that occurs when fusing.
The purpose of tube fuses is to protect equipment by interrupting the circuit when an abnormal current flows. During regular operation, the fuse must pass the current without melting. Therefore, it is necessary to check the rated current of tube fuses and select tube fuses so that the standard current during regular operation is lower than the rated current.
*Including some distributors, etc.
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