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ABB: S803UP K20 – High Performance MCB

May 20, 2026 - ABB S803UP K20 - High Performance MCB

May 20, 2026

S803UP K20 MCB: An Ideal Choice for Critical Power Infrastructures, Data Centers & Renewable Applications

Meet ABB’s most powerful UL‑certified High‑Performance Circuit Breaker in a compact DIN-rail size (81 mm, 3‑pole design), compliant with UL 489 at 480V. The S800UP Series is engineered for demanding environments, delivering reliable protection and enhanced performance without sacrificing space. An ideal option for critical power infrastructures, data centers, and renewable applications, the S803UP K20 MCB ensures consistent operation where uptime and efficiency matter most. Explore how its compact form, 50 kA interrupting capacity, and easy integration can elevate your installation.

Main Benefits

  • High Performance: UL 489 certified with a 50 kA interrupting rating at 480Y/277 VAC and rated current up to 70 A. UL 100% rated for continuous load at rated current, avoiding the need to upsize the MCB and cable section.
  • Protection of Sensitive Equipment: Two arc chambers per pole, reducing peak current and let-through energy during short circuit, ensuring complete protection of downstream equipment.
  • Compact and Easy to Install: High breaking capacity with 3 poles in only 81 mm width (1.5 modules per pole), suitable for DIN-Rail installation with no need of adapter. Flexible top and bottom supply with interchangeable kit for quick change from cage to ring terminals.
  • Complete Control of the Installation: Compatible with a wide range of accessories, upgrading the installation by adding extra features and functions to the product for improved monitoring and control.

Main Features

  • UL 489 certified with 50kA interrupting rating at 480Y/277 VAC
  • 100% rated according to UL
  • Rated current up 20…70 A in K tripping characteristics
  • 3 poles in only 81 mm width for DIN-Rail installation
  • Compatible with wide range of accessories, including shunt trip, auxiliary and signal contacts
  • Toggle Position Indication (TPI): 3 status ON-OFF-TRIP with TRIP position in the middle, easily identifying the tripping cause due to overcurrent
  • Interchangeable terminals from fail-safe cage terminals to ring-lug terminals with supply from top or bottom side
  • May 20, 2026 - ABB S803UP K20 - High Performance MCB
  • May 20, 2026 - ABB S803UP K20 - High Performance MCB
  • May 20, 2026 - ABB S803UP K20 - High Performance MCB
  • May 20, 2026 - ABB S803UP K20 - High Performance MCB
  • May 20, 2026 - ABB S803UP K20 - High Performance MCB

For more information on ABB electrical solutions HERE

May 20, 2026 - ABB S803UP K20 - High Performance MCB

Source

S803UP K20 S803UP K20

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