Non resettable fuses are a type of single use circuit protection device that are can be soldered onto printed circuit boards or carriers. This category encompasses any type of single-use fuse that consist of a fuse body with two wires extended outside of the body.
Non resettable fuses form part of a circuit and allow an electrical current to flow through them. When a fault such as overcurrent or a short circuit is detected, the metal strip in the fuse body will melt, breaking the circuit and preventing damage. This type of fuse must be replaced after it has blown.
These fuse types are often used in motors, where if overheating occurs, the power is cut before any permanent component damage occurs.
Non-resettable fuses differ broadly, mainly in their shape. The fuse body can be a short, fat cylinder or a longer, thinner one, and the wires may extend in parallel both from the same side of the fuse, or in opposite directions from either side of the fuse body. They also differ in their current and voltage rating, and the range of their operating temperature.