What is fuse-Fuse:
A fuse, also known as a current fuse or fuse, is defined by the IEC 127 standard as a "fuse-link". It is an electrical component installed in the circuit to ensure the safe operation of the circuit. A wire made of a silver-copper alloy with a relatively large resistivity and a relatively low melting point is called a fuse. Fuses originally made of lead-antimony alloy have been eliminated for safety reasons.
Fuse-Fuse classification:
according to the type of fuse, it can be divided:
1. Current fuse (patch fuse, micro fuse, insert fuse, tubular fuse, automobile fuse);
2. Temperature fuse (RH [block type], RP [resistance type], RY [metal shell]);
3. Self-recovery fuse (plug-in, lamination, patch).
Fuse-Fuse UL certification standards:
UL 248-1 the general requirements apply to low-voltage fuses with a rated voltage of 1000V or less, AC and/or DC, and an interruption rating of up to 300 kA (200 kA in Mexico).
UL 248-14 the supplementary fuse is suitable for rated fuses with a rated current of 60 A or lower. It is only used for supplementary overcurrent protection and does not involve branch circuits or equivalent applications. DC rating is optional.
UL 248-13 semiconductor fuses are suitable for semiconductor fuses with a rated voltage of 2000V ac or lower. DC rating is optional.
Fuse-fuse UL certification test items:
Application for fuse UL certification to provide information
1. Product model;
2. Specification parameters;
3. Appearance dimension drawing;
4. Dimension drawing of parts;
5. Parts list;
6. Fuse size and current comparison table;
7. Fuse appearance diagram (more complex fuse).
Factors affecting the quotation of UL certification of fuse
1. The structure size is different;
2. The pins (end caps) are different;
3. Different fuse materials;
4. There are many breaking parameters;
5. Overload parameters.
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