Detailed explanation of the comparison table between the fusing time and fusing current of the fuse

In electronic circuits and electrical equipment, fuses are an important protective component. Their function is to prevent overload current from causing damage to the equipment. The fusing performance of the fuse is mainly reflected in two parameters: fusing time and fusing current. Understanding the relationship between these two parameters and their comparison table is crucial to designing and selecting an appropriate fuse. This article will introduce in detail the comparison table of the fuse's fusing time and fusing current to help you better understand and apply fuses.

1. Basic concept of fuse

A fuse is a safety device used for circuit protection. When the current exceeds its rated value, the fuse in the fuse will quickly blow, thereby cutting off the circuit and preventing damage to electrical equipment due to overload or short circuit. The fusing time refers to the time from when the current exceeds the rated value to when the fuse is completely disconnected; the fusing current is the maximum current value that the fuse can withstand.

2. Relationship between fusing time and fusing current

The fusing time of the fuse is inversely proportional to the fusing current. Generally speaking, the larger the current, the shorter the time it takes for the fuse to blow; the smaller the current, the longer the time it takes for the fuse to blow. This feature allows the fuse to quickly open when an abnormality occurs in the circuit, while avoiding malfunction due to short-term current fluctuations.

3. Classification of fuses and their fusing characteristics

According to the fusing speed, fuses can be divided into fast-blow type and slow-blow type. Fast-blow fuses are suitable for occasions with strict circuit protection requirements and need to be disconnected quickly; slow-blow fuses are suitable for situations where there is a short-term current impact in the circuit, such as motor starting current.

4. The role of the fusing time and fusing current comparison table

The fusing time and fusing current comparison table is an important reference tool for designers and engineers when selecting fuses. Through the comparison table, the fusing time of the fuse under different current conditions can be clarified, so as to select a fuse model that can protect the equipment without affecting normal operation.

5. Common fuse blowing time and fusing current comparison table examples

| Current multiple (I/In) | Fusing time range (seconds) |

|------------------|--------------------|

| 1.05 | >300 |

| 1.5 | 60-300 |

| 2 | 10-60 |

| 5 | 0.1-1 |

| 10 |

Note: I is the actual current, In is the rated current of the fuse. The data in the table are for reference only, specific parameters should be subject to the product manual.

6. How to choose the appropriate fuse based on the comparison table

When selecting a fuse, you should select a fuse that can withstand normal operating current and blow quickly in the event of abnormal overload based on the normal operating current of the circuit and the maximum possible overload current. Refer to the fusing time and fusing current comparison table. In addition, the starting current and short-term current surge of the equipment need to be considered to avoid malfunction of the fuse.

7. Factors affecting the blowing performance of fuse

In addition to the size of the current, temperature, environmental conditions, and the materials and construction of the fuse can also affect its fusing time and fusing current. Therefore, in practical applications, fuses should be reasonably selected and installed based on the specific environment and usage conditions.

8. Suggestions on maintenance and replacement of fuses

Check the condition of the fuse regularly to make sure it has not failed due to overload or age. Once the fuse is found to be blown, it should be replaced in time and the circuit should be checked for abnormalities to avoid repeated blowing and equipment damage.

：

The fusing time and fusing current of a fuse are key indicators to evaluate its protection performance. By understanding the relationship between fusing time and fusing current and its comparison table, engineers can select fuses more scientifically and rationally to ensure the safe operation of electrical equipment. Reasonable fuse selection can not only effectively protect the circuit, but also extend the life of the equipment and improve the reliability of the overall system. I hope this article helps you understand and apply fuses.