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S300P Miniature Circuit Breakers

S300P MCB for industrial

The S300P MCB is available in B, C, D, K, and Z characteristics from 0.2 to 63A.

ABB's S300P MCBs are fully compatible with existing System pro M compact accessories and provide reliable protection in control panels, transportation, renewable, food and beverage segments to reduce downtime and increase service continuity.

S300P MCBs are designed as next generation supplementary protectors with interrupt rating of 10 kA for the entire range as per UL 1077.


  • Integrated trip indicator for clear signalization of tripping events on site
  • Dual DIN-rail release for fast and easy installation
  • Fully compatible with complete range of System pro M compact accessories supporting many different functions
  • Terminals equipped with fail-safe feature to help prevent improper installation
  • Supply possible from top or bottom and in parallel with cables and busbars thanks to terminals with two different openings
  • Certified quality and compliance according to worldwide product standards
  • Quick product information by direct scanning of QR-code on the product itself

Technical characteristics

  • Rated nominal current: 0.2 A ... 63 A
  • Characteristic: B, C, D, K, Z
  • Pole variant: 1, 2, 3, 4
  • Rated interrupt rating as per UL 1077: 10 kA
  • Rated voltage: 1P: 277 V AC, 60 V DC - 2P...4P: 480Y/277 V AC, 125 V DC (2 pole in series)
  • Rated impulse withstand voltage Uimp: 6 kV

Certifications & Standards

  • UL 1077 
  • CSA C22.2 N0. 235
  • IEC/EN 60947-2
  • IEC/EN 60898
  • Fire and Smoke EN45545-2
  • Vibration and Shock (IEC/EN 61373, IEC/EN 60077-1)


  • OEMs
  • Control Panel Builders
  • Traction or railway
  • Solar market

*Use with the UL MCB Busbar