First of all dear its not HRCF , its HRC . Now i am telling you what is HRC - HRC Fuse or High Rupturing Capacity Fuse. HRC fuse or high rupturing capacity fuse- In that type of fuse, the fuse wire or element can carry short circuit heavy current for a known time period. During this time if the fault is removed, then it does not blow off otherwise it blows off or melts...