Miniature circuit breakers (MCBs)

Uncompromising safety and comfort

Miniature circuit breakers (MCBs) ensure electrical safety in homes, offices and other buildings as well as for industrial applications by protecting electrical installations against overloads and short circuits. Once a fault is detected, the miniature circuit breaker automatically switches off the electrical circuit to prevent damage to wires and to avoid the risk of fire. Warranting reliability and safety for people and assets, MCBs are equipped with two tripping mechanisms: the delayed thermal tripping mechanism for overload protection and the magnetic tripping mechanism for short circuit protection.

System pro M compact®

With System pro M compact® ABB offers an extra-wide and complete range of miniature circuit breakers to cover most applications and markets. Our products are compliant to worldwide product standards (IEC, UL, CSA). With over 90 years of experience of innovation in the electrical sector, we offer established and certified quality.

  • Compliant to worldwide product standards (IEC, UL, CSA)
  • Characteristics: B, C, D, K, Z
  • Configurations: 1P, 1P+N, 2P, 3P, 3P+N, 4P
  • Breaking capacities up to 25 kA
  • Rated currents up to 100 A

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Wide range

Extra-wide and complete range of MCBs to cover most applications and markets

Certified quality

Compliance to worldwide product standards (IEC, UL, CSA)


Space and time saving thanks to the unique bottom-fixing auxiliary contact

Product ranges

IEC certified MCBs

UL certified MCBs

MCBs for special applications



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