What are the differences between fuse and MCB?

MCB (Miniature Circuit Breakers) :

  • MCB trips off in case of excessive load.
  • MCB is to be just put-on after correcting the fault in wiring.
  • Since we do not change the MCB, there is no risk of putting on the MCB/switch even if the fault is not correctly repaired.
  • Compact, small equipment.
  • Works on Bi-metal expansion or induced magnetism.
  • Relatively costlier than fuse.


  • Fuse melts/fuses in case of excessive load.
  • Fuse needs to be replaced with a new one.
  • There is a risk of putting on the switch in case; due to ignorance higher capacity fuse-wire is positioned.
  • Porcelain base and top. Not attractive.
  • Works on melting/fusing due to high temperature.
  • Relatively cheaper than MCB.