A 1500V DC fuse is an electrical device designed to protect circuits from over-voltage with the upper limit being 1500 volts. Meaning that they would trip after exceeding this volt rate.

The 1500-volt DC fuses are used as circuit isolators. In this case, they are responsible for isolating the circuit after the fuse has blown from the remaining system thus preventing subsequent damage.
Similarly, they are used as fault detectors in a DC electrical system. For instance, the blowing of the fuse indicates that there is a faulty activity within the circuit that needs addressing.
Features
The 1500 V DC fuses distinct features that enable them to effectively serve their purpose. However, these features tend to vary depending on the specific standards of clients as well as specific applications. They are commonly designed with an inside fuse element for melting the strip in the event of over-current and they also have a metallic body.
Applications
These DC fuses are designed for high-voltage DC electrical systems. For example, they can be applied in high-voltage battery systems of electric cars to protect the circuits. Other applications include industrial machinery, as well as high voltage energy systems of wind and solar power.