Semiconductor fuses play a crucial role in protecting semiconductor devices from short circuits and overload damage. When selecting, the following aspects can be considered:
rated current
The selection should be based on the normal operating current of the actual application circuit. Generally, the rated current of the fuse should be slightly higher than the maximum normal operating current of the circuit to ensure that the fuse will not melt during normal operation. But it cannot be too large, otherwise when the circuit is overloaded, the fuse cannot act in time and cannot provide protection.
rated voltage
For circuits with a working voltage of 250V, semiconductor fuses with a rated voltage of not less than 250V should be selected.
breaking capacity
Breaking ability refers to the ability of a fuse to safely cut off a circuit in the event of a short circuit or high current. Choose a fuse with appropriate breaking capacity based on the maximum short-circuit current that may occur in the circuit.
In some circuits with high power and potential short-circuit currents, it is necessary to choose semiconductor fuses with high breaking capacity to ensure that the circuit can be quickly cut off in the event of a short circuit, preventing damage to other components.
response time
The response time requirements for fuses vary in different application scenarios
In some circuits with extremely high safety requirements, such as semiconductor circuits in medical equipment, aerospace and other fields, fuses need to have extremely fast response time to quickly cut off the circuit in the event of a fault, protecting the safety of personnel and equipment.
temperature range
Different application environments have significant temperature differences, so it is necessary to choose semiconductor fuses that can work normally within the corresponding temperature range. Generally speaking, the performance of fuses will change with temperature, and in high-temperature environments, the rated current of fuses may decrease.
Factors such as humidity and vibration
If the equipment operates in a damp or vibrating environment, semiconductor fuses with good moisture resistance and vibration resistance should be selected. Fuses with poor moisture resistance may experience rusting, corrosion, and other issues in humid environments, affecting their performance; Fuses with poor anti vibration performance may loosen in a vibrating environment, leading to poor contact.
In equipment with high vibration such as ships and industrial machinery, semiconductor fuses with good anti vibration performance should be selected.
