Semiconductor fuses are used to protect against over-current conditions in semiconductor

Semiconductor

A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...

s devices. Because of their fast action, semiconductor fuse

Fuse (electrical)

In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide overcurrent protection, of either the load or source circuit...

s help to limit the short circuit current significantly.

Semiconductor fuses are available in several different enclosures and at least two different ranges:

• gR-type: full range protection. Overload and short circuit protection.
• aR-Type: partial range protection. Short circuit protection only. Faster acting than full range fuses.

Typical Markings: Ultra Rapid, Silized, Silcu, Sitor, Recticur, Protistor.

These components are not usually seen in consumer electronics products.