New energy fuse 5.2x10mm, 100mA~20A, 660V/1000V, 5CH
New energy fuse 6.35x32mm, 100mA~30A, 500V/660V/1000V, 6CH
New energy fuse 10x38mm, 500mA~40A, AC/DC1000V, 10C
Power Fuse
Why Choose Us?
Rich Experience
XC Electronics (Shenzhen) Corp. Ltd is a leading industrial manufacturer that develops and manufactures all kinds of fuse and thermostat since 2002. The Hong Kong company named XGH ELETRIC COMPANY was founded in 1996.
Wide Range of Products
The products ranges miniature fuses, micro fuses, SMD fuses, power fuse, plug fuse, high voltage fuse, blade fuse, fuse holders, thermostat and thermal sensors for circuit protection and thermal protection solutions.
Professional Team
We have a stable R&D team with 30 people, each with more than 5 years' work experience. They can independent research and develop products and equipment.
Our Certificates
With vertically integrated manufacturing facilities certified TS16949, ISO9001, and ISO14001, All the products are lead-free that complies with RoHS Directive and REACH regulations. The products are extensively certified by CCC, VDE, cULus, PSE, KC, TÜV, CQC, ect.
What is Power Fuse
Power Fuse eliminate potential dangers like excessive temperatures and power surges to the electrical systems. Fuses are intentionally placed in a circuit as a weak point so that it is sacrificed during a high current from an overloaded or short circuit by melting it and breaking the circuit.
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Advantages of Power Fuse
While circuit breakers, polyswitches, protective relays, and thermistors are considered as great alternatives for fuses, there are some reasons why you might just want to opt for fusing instead. Here are a few of them.
Cost-effective
Comparatively, fuses are the most cost-effective elements to provide protection against overcurrent flow. Electric fuses can be used where high fault current exists or where smaller components like DC power supplies or control transformers require protection.
Safety and Reliability
Electromechanical devices don’t have the capacity to open safely after a few faults, whereas a fuse is replaced after every fault or trip. Therefore, the protection level of the complete circuit is not hampered by any of the previous faults.
Minimal Maintenance
Unlike other electromechanical protective devices, electric fuses do not require regular recalibration since they are replaced every time they are opened.
Long Lasting
As the fuse ages, its ability to provide protection from overcurrent flow does not slow down or get adversely affected, thus being a sustainable alternative as compared to circuit breakers and protective relays.
Types of Power Fuse
Electrical fuses are primarily divided into AC and DC fuses. Regardless of whether they are AC or DC, automatic fuses are now commonly used for safety purposes. Overload protection in automatic fuses is provided by a magnetic circuit breaker against short circuits and a thermal circuit breaker against overloads. The circuit breaker can be easily reset after an interruption. For this reason, fuses are increasingly being replaced by automatic circuit breakers.
AC Fuses
AC fuses operate at approximately 50-60 cycles per second, which corresponds to the current flowing through the fuse circuit over time. Since there is no arcing between the fusible wires, these models are relatively small. AC fuses are categorized into high voltage and low voltage fuses.
High Voltage Fuses
High-voltage fuses, used in power transmission lines, are designed to protect the circuit from short circuits and leakage faults caused by overvoltage, load, damage to conductive parts, lightning strikes, and other issues. These fuses are further divided into two types: impact pin and optical indicator.
Impact Pin Fuses: In these fuses, a pin is released when the fuse blows. This pin not only indicates that the fuse has blown but also activates a mechanical component using the energy it releases.
Optical Indicator Fuses: High-voltage fuses with optical indicators provide information about the fuse's status via an indicator. When the fuse blows, a red thimble appears on the indicator, making it easier to identify the damaged fuse.
Low Voltage Fuses
Low voltage fuses have a voltage rating of 1,500 V or less. They are produced with various features and technologies and are categorized as follows:
Cartridge Type Fuses
Cartridge fuses are placed in tightly sealed containers with metal contact points at both ends. The completely enclosed structure ensures that the arc remains contained when the fuse blows. While known as low voltage fuses, they can also be found among high voltage fuses. These fuses are categorized into D type and connection type:
D Type Fuses: These fuses consist of a cartridge, fuse base, cap, and adapter ring. The cartridge is inserted into the fuse cap, while the adapter ring is inserted into the fuse base. The cartridge's end must contact the conductive parts to complete the connection.
Connection Type Fuses: These fuses are designed to interrupt high current. Their bodies are usually made of porcelain or ceramic to control the arc in case of blowing. They are divided into two types: blade and bushing.
Bladed Fuses: These fuses are used to interrupt currents reaching high values. They can replace screw-in plug-in fuses, especially those rated above 100 Amperes. In automotive applications, most fuses are blade type, fitting into a small plug with two prongs. The ampere rating, or the maximum current the fuse can carry, is indicated on the body.
Cartridge Fuses: These consist of a porcelain or glass body and cover and are equipped with siliconized sand or conductive wires to protect against high currents. Conductive wires are used with those that will resist when excess current flows. The body ends are designed to be long to prevent electric arcing. This design allows them to be used in both residential and commercial settings. The cartridge, which gives the fuse its name, contains the wires that melt when the fuse blows. Designed for specific current values, it opens the circuit by melting under high current. To restore the circuit after interruption, the fuse must be replaced.
Rewindable Fuses
These consist of a base and a fuse carrier containing the rewindable input and output terminals. The base is typically made of porcelain and contains copper or aluminum parts. The fuse carrier is mounted on the base, and if the fuse is damaged by overcurrent, it can be removed without risk of electric shock, making wire replacement easy. These fuses are most commonly used in households but are also found in small industrial plants and other low-current applications.
Switch Fuses
Switch fuses provide protection against magnetic and thermal effects. They have the advantage of being a single component and can also function as a switch.
Drop-Out Fuses
Drop-out fuses, which provide protection against short circuits and are used in switching operations, are commonly found with 10 kVA electrical distribution transformers.
Construction of an Power Fuse
An electrical safety component is an essential element in any electrical circuit, designed to prevent overcurrent that could lead to damage, fires, or electrical failures. The creation of an electrical safety device is relatively simple but crucial for its operation. It comprises of a few key components:
Fuse Element
This is the heart of the fuse. Made from a metal wire or strip, it melts when the current flowing through it exceeds a specific threshold, thereby interrupting the flow and protecting the circuit.
Fuse Body
This component encases the electrical safety device element. It is designed to provide structural support and to ensure that the electrical component is adequately protected from external elements that could affect its performance.
End Caps
Positioned at both ends of the component body, these caps are crucial for forming a connection with the electrical circuit. They must be made of conductive materials to allow electrical current to pass through them into the element that allows the flow of electrical current.
How does the Power Fuse work?
When current flows through a conductor, the conductor can heat up because of the presence of a certain resistance within the conductor.
And also the hot value follows this formula: Q=0.24I2RT within the formula, “Q” is that the calorific value; 0.24 is a constant; “I” is the current flowing through the conductor; “R” is the resistance of the conductor; “T” is the time for the current to flow through the conductor.
When the material and form of the fuse are determined, its resistance R is tremendously determined (If you do not add its temperature coefficient of resistance).
It heats up whilst current flows via it, and it heats up over time.
The size of the current and resistance determines the Thermal efficiency, and the shape of the fuse and its set up circumstance decide the efficiency of heat dissipation; if the efficiency of heat is much less than the efficiency of heat dissipation, the fuse will not be blown; if When the efficiency of heat is identical to the efficiency of heat dissipation, it’s going to now no longer fuse for a protracted time;
if the efficiency of heat is extra than the efficiency of heat dissipation, increasingly more heat might be generated, and due to the fact It has a sure particular heat and quality, and the boom in its heat is meditated with inside the boom in temperature.
When the temperature rises above the melting factor of the fuse, the fuse might be blown. This is the running precept of the low fuse.
From this principle, it should be known that the physical properties of the selected binder materials must be carefully studied when designing and manufacturing fuses and to ensure that they have consistent geometric dimensions.
What are the elements of Power Fuse selection?
Confirm the current: The rated current of a fuse is representative of a 25% reduction in operation at 25°C. For example, a fuse with a rated current of 10A is normally recommended to operate at an ambient temperature of 25°C at no more than 7.5A.
First, determine the rated operating current of the actual product. a/0.75 is the rated current of the fuse.
The rated current of the fuse can also be selected by reference to 1.5-2.0 times the actual input current of the product.
Confirm the withstand voltage: It should be greater than or equal to the effective circuit voltage. The common specification is 250V AC.
Confirm safety certification: IEC, UL, CSA, TUV, CCC.
Confirm the electrical characteristics: F (fast fuse), T (slow fuse), and self-recovery, here you need to combine the product with the actual application environment for selection, including the surge (lightning) immunity Surge, input inrush current-related current-related indicators. Specific fuse specifications can be combined with the current and time curves for selection, the general switching power supply fuse for the slow fuse type. (Reminder: need to focus on whether the single pulse energy is less than the single pulse energy of the fuse)
Confirm the working temperature range: The actual product application temperature range. The operating temperature range of the fuse should not be less than the actual product application temperature range.
Confirm the package: Combine the size of the product, the process, the safety distance, and the cost to select the most suitable fuse. In particular, the electrical gap and creepage distance before and after the fuse need to meet the basic insulation.
PCB board notes: For products that need to do certification, the fuse specifications (rated operating voltage and rated operating current) need to be printed on the PCB, products without certification requirements, it is also best to synchronize the above.
Common Causes of Blown Power Fuse
》The circuit has a short circuit, and the short circuit current is too great to cause the fuse to explode.
》The loop fuse is blown because the load power is too high and the current rises, which is greater than the fuse's capacity to handle the current regularly.
》The voltage is unstable, and the electrical device's power fluctuates often, which causes frequent fluctuations in the current flowing through the fuse and the fuse's eventual blowing.
》The fuse itself is worn out and has been in use for too long. Because the fuse has a specific resistance, when the current warms up, the resistance increases, and the fuse eventually blows because the resistance becomes too high.
》The fuse has been oxidized after being in the air for a long time.
Our Factory
XC Electronics (Shenzhen) Corp. Ltd is a leading industrial manufacturer that develops and manufactures all kinds of fuse and thermostat since 2002. The Hong Kong company named XGH ELETRIC COMPANY was founded in 1996. The products ranges miniature fuses, micro fuses, SMD fuses, power fuse, plug fuse, high voltage fuse, blade fuse, fuse holders, thermostat and thermal sensors for circuit protection and thermal protection solutions that are widely used in powers, household appliances, lightings, batteries, new energy resources, automotive equipment, communications devices and computers.
FAQ
We're well-known as one of the leading power fuse manufacturers and suppliers in China. If you're going to buy high quality power fuse at competitive price, welcome to get more information from our factory.
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