How much overload can a time delay fuse handle?

A time delay fuse is designed to withstand temporary overloads, typically allowing for a significant increase in current for a short duration without blowing. This is essential for applications where momentary surges are expected, such as when starting motors or other inductive loads that may draw more current at startup.

The statement that a time delay fuse can handle up to 500% overload reflects the general principle that these fuses are engineered to tolerate high current levels temporarily. In many cases, they can endure current multiples ranging from 300% to 500% of their rated value for limited periods. This characteristic protects the circuit from nuisance tripping due to inrush currents while ensuring safety if the overload persists.

Understanding the capabilities of time delay fuses helps in selecting the appropriate fuse for specific applications where inrush currents are a concern, providing a crucial balance between protection and functionality in electrical systems.