Segmenting ability of semiconductor fuses
The segmentation ability of semiconductor fuses is an important electrical performance indicator. Below, we will provide a detailed introduction from the aspects of definition, influencing
influencing factors
Structural design of fuses: Reasonable structural design can enable fuses to quickly extinguish arcs and improve segmentation capabilities when cutting off circuits. For example, using special
melt shapes, arc extinguishing materials, and packaging structures can enhance the arc extinguishing ability of fuses, thereby improving their segmentation ability.
Arc extinguishing medium : The performance of the arc extinguishing medium has a significant impact on the segmentation capability. Common semiconductor fuses use quartz sand as the
arc extinguishing medium. Quartz sand has good insulation and heat dissipation properties, and can quickly absorb arc energy when the fuse melts, extinguishing the arc and improving the
segmentation ability.
Melt material: The physical properties such as melting point, electrical resistivity, and thermal conductivity of the melt material can affect the melting characteristics and arc extinguishing
ability of the fuse. Generally speaking, molten materials with appropriate melting points and resistivity can quickly melt under the action of short-circuit current, generate sufficient arc voltage,
promote arc extinguishing, and improve segmentation ability.
Common values and their meanings
Numerical significance:
In practical applications, it is necessary to select a semiconductor fuse with appropriate segmentation capability based on the maximum short-circuit current that may
occur in the circuit. If the selected fuse has too low segmentation capability, the fuse may not be able to cut off the circuit properly when the short-circuit current exceeds its segmentation
capability, which may cause safety accidents; If the selected segmentation capability is too high, although it can ensure safe circuit disconnection under any short-circuit current, it may increase
costs and in some cases may affect the normal operation of the circuit.
