6.3A 3T 4x11mm Delayed Glass Fuse

A glass fuse works by breaking the circuit when the rated current passes through it. When the current passing through the fuse exceeds the rated current, the thin wire melts and breaks the circuit. It protects the circuit elements against damage caused by excessive current.

The difference of delayed-action fuses is that they do not react immediately and do not break the circuit immediately when the current value they can withstand is exceeded. This ensures that circuits are not interrupted, especially when using products that draw high current at first, such as motors.