Voltage Rating of a Fuse is defined as:

• A. The maximum short circuit current the fuse can safely interrupt.
• B. The current that the fuse is intended to normally carry.
• C. The time to interrupt under fault.
• D. The maximum circuit voltage in which the fuse can be safely applied.

Answer: (D)

Voltage rating is the maximum circuit voltage at which a fuse can be safely applied and still function correctly. This spec ensures the fuse’s internal construction and insulation can withstand the voltage across it and that, when the fuse opens, the arc is contained and quenched without energizing other parts of the circuit. If you exceed this rating, the fuse may arc over or fail to interrupt reliably, creating a safety hazard.

What the other numbers describe is a different aspect of performance: the maximum short-circuit current the fuse can safely interrupt is about interrupting capacity, not how much voltage the fuse can tolerate; the current a fuse normally carries is its current rating; and the time to interrupt under fault is about how quickly the fuse acts.