We all know that fuses are very important for the safety of circuits. Almost every circuit needs a fuse for protection. The dormitory can ensure that when the circuit fails, it will not have a devastating impact on the circuit. At the same time, with the protection of the fuse, it can also ensure that no loss of personnel or property will be caused when the circuit fails. China fuse manufacturers tell you, that fuses play a very important role in daily life.
Fuse Type:
(1) Volume
Divided into: large, medium, small, and micro.
(2) Rated voltage
Divided into: high-voltage fuses, low-voltage fuses, and safety voltage fuses.
(3) Scope of use
Divided into: power fuses, machine tool fuses, electrical instrument fuses (electronic fuses), and automotive fuses.
(4) Breaking capacity
Divided into: high and low breaking capacity fuses.
(5) Fusing speed points
Divided into: extra-slow fuse (generally represented by TT), slow fuse (generally represented by T), medium-speed fuse (generally represented by M), fast fuse (generally represented by F), super-fast fuse (generally represented by FF) express).
(6) Protection form
Divided into: overcurrent protection and overheating protection. The fuse used for over-current protection is commonly referred to as a fuse (also called a current-limiting fuse). Fuses used for overheating protection are generally called "thermal cutoffs". Thermal fuses are divided into low melting point alloy type, temperature trigger type, memory alloy type, etc.
(7) shape
Flat tubular fuses, pointed tubular fuses, guillotine fuses, screw fuses, blade fuses, flat fuses, wrap fuses, and chip fuses.
①Filix: This is an old-fashioned fuse that is directly locked with screws and is used for old-fashioned switches and sockets of various sizes.
②Flake: It is also a relatively primitive fuse, but it is relatively easier to use than a wire.
③Glass tube shape: Put the molten material in a glass tube, which is common in electronic products.
④Ceramic tube: There is a risk of bursting when the glass tube is used, so some will use ceramic tubes instead of glass tubes.
⑤Plastic sheet: with metal sheet pins, this kind of fuse is generally used in cars.
⑥Cylindrical fuse: The cylindrical fuse is a plug-in type, which is generally directly welded on the circuit board and used inside the product.
(8) type
Current fuse, temperature fuse, resettable fuse.
What protection is the fuse mainly used for?
(1) Overcurrent protection
The fuse used for over-current protection is commonly referred to as a fuse (also called a current-limiting fuse). China fuse manufacturers warmly remind us that it can cut off the current in time when the circuit fails or is abnormal, and plays a certain role in protecting electrical appliances and circuits.
(2) Overheat protection
Fuses used for overheating protection are generally called 'thermal fuses'. Thermal fuses are divided into low-melting point alloys, temperature-sensitive triggers, memory alloys, and so on.
Is the melting point of the fuse high or low?
The melting point of the fuse is low because the fuse is made of lead-antimony alloy with high resistance and low melting point. This is done so that when the current in the circuit is too large, the fuse can generate more heat, which is convenient for the fuse to blow quickly. So as to play the role of protecting the circuit.
The melting point of household fuses is generally between 300-500 degrees Celsius. The fuse is mainly used for overload protection. Chinese fuse manufacturers tell you that if the fuse is installed correctly in the circuit, the fuse will fuse itself to cut off the current when the current abnormally rises to a certain height and heat, thus protecting the safe operation of the circuit.