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China UL_ VDE_ TUV_ EK_ PSE Certification Online Electrical Fuse Sale Company

Product Item: China UL_ VDE_ TUV_ EK_ PSE Certification Online Electrical Fuse Sale Company
Category: Current fuse
Basic composition of fuse
A general fuse consists of three parts: The first is the melt part, which is the core of the fuse and cuts off the current when it blows.The fuses of the same type and same specification fuse must have the same material, the same geometric size, and the resistance value as small as possible and consistent. The most important thing is to have consistent fuse characteristics. Household fuses are often made of lead-antimony alloys.
The second is the electrode part, usually there are two, it is an important part of the melt and circuit connection. It must have good electrical conductivity and should not produce significant mounting contact resistance.
The third is the bracket part, the fuse of the fuse is generally thin and soft. The role of the bracket is to fix the melt and make the three parts rigid and easy to install and use. It must have good mechanical strength, insulation, heat resistance and flame retardancy, and should not cause cracks, deformation, combustion and short circuits in use.

  • PRODUCT DETAIL
Basic composition of fuse
A general fuse consists of three parts: The first is the melt part, which is the core of the fuse and cuts off the current when it blows.The fuses of the same type and same specification fuse must have the same material, the same geometric size, and the resistance value as small as possible and consistent. The most important thing is to have consistent fuse characteristics. Household fuses are often made of lead-antimony alloys.
The second is the electrode part, usually there are two, it is an important part of the melt and circuit connection. It must have good electrical conductivity and should not produce significant mounting contact resistance.
The third is the bracket part, the fuse of the fuse is generally thin and soft. The role of the bracket is to fix the melt and make the three parts rigid and easy to install and use. It must have good mechanical strength, insulation, heat resistance and flame retardancy, and should not cause cracks, deformation, combustion and short circuits in use.

Fuse arc extinguishing device
The fuses used in power circuits and high-power equipment include not only the three parts of general fuses, but also arc extinguishing devices.
Because the circuit protected by this type of fuse not only has a large working current, but also the voltage across the fuse is very high when the fuse is blown, often the melt has melted (fused) or even vaporized, but the current is not cut off.
The reason is that under the action of voltage and current at the moment of fusing, arcing occurs between the two electrodes of the fuse.
This arc extinguishing device must have strong insulation and good thermal conductivity, and be negatively charged. Quartz sand is a commonly used arc extinguishing material.

Fuse device
In addition, some fuses have a blow-out indicator. Its function is that when the fuse operates (fuse), it will have a certain appearance change, which is easy to be found by maintenance personnel. For example: glow, change color, pop solid indicator, etc.



Breaking Capacity Material Operating Temperature Soldering conditions
VDE:35A or 10ln whichever is greater(250mA-6.3A)
UL:50 amperes at 125V/250V AC (250mA-10A)
Fuse body –glass tube
End cap --nickel plated brass
Pigtail--tin plated copper on nickel plated brass cap
-40℃~+125℃ Wave solder:260℃,≤5S
Hand solder: 360℃,≤1S
 
 
Functional  Characteristics
Testing current Blow Time
Min Max
150% 1 hour  -
210% 100ms 1800s
275% 10ms 3s
400% 3ms 300ms
1000% - 20ms
 
 
Approvals(○ Pending ● Approvals)
Current Rating
 
Voltage Rating Norminal Melting
I2T(A2sec)
Approvals
VDE CQC UL PSE KC
250mA 125V/250V 0.14  
300mA 125V/250V 0.20        
315mA 125V/250V 0.23  
350mA 125V/250V 0.27        
400mA 125V/250V 0.38        
500mA 125V/250V 0.50  
600mA 125V/250V 0.72        
630mA 125V/250V 0.9  
750mA 125V/250V 1.2        
800mA 125V/250V 1.6  
1A 125V/250V 2.4
1.25A 125V/250V 3.5
1.5A 125V/250V 4      
1.6A 125V/250V 7.2
2A 125V/250V 9.6
2.5A 125V/250V 16
3A 125V/250V 17.8      
3.15A 125V/250V 22
3.5A 125V/250V 28      
4A 125V/250V 45
5A 125V/250V 62
6A 125V/250V 70        
6.3A 125V/250V 72  
7A 125V/250V 88        
8A 125V/250V 110  
10A 125V/250V 144  
 
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