2CCS862017R0907 ABB S802U-K90 90A 2-Pole K Characteristic 50kA UL 489 MCB

Why Choose the ABB S802U-K90 High-Performance MCB?

The ABB S802U-K90 is a high-performance 2-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding industrial and commercial electrical systems. Part of the ABB S800U high-performance circuit breaker series, it combines a 90 A rated current, K tripping characteristic and high short-circuit capability in a compact modular format.

Designed for applications requiring UL 489 branch-circuit protection, the S802U-K90 provides robust performance where high prospective fault currents may be present. Its K characteristic is particularly suitable for circuits with functional peak or inrush currents, helping reduce unwanted tripping while maintaining effective overload and short-circuit protection.

With a 2-pole configuration and 50 kA short-circuit capability, the S802U-K90 is well suited to industrial machinery, motor circuits, transformers, control systems and electrical distribution equipment. ABB's S800 platform combines current-limiting performance with DIN-rail mounting for straightforward integration into control panels and distribution assemblies.

Key Advantages

• High-performance 2-pole miniature circuit breaker.
• 90 A rated current for dependable branch-circuit protection.
• K tripping characteristic suitable for loads with functional peak and inrush currents.
• High 50 kA short-circuit capability.
• Designed for applications requiring UL 489 circuit breakers.
• Provides combined overload and short-circuit protection.
• Current-limiting design helps reduce the effects of high fault currents.
• Compact modular construction for industrial distribution and control panels.

Key Features

• ABB S800U high-performance MCB series.
• 2-pole configuration.
• 90 A rated current.
• K tripping characteristic.
• 50 kA short-circuit capability.
• Thermal overload and electromagnetic short-circuit protection.
• High-performance current-limiting circuit breaker design.
• Suitable for circuits with elevated functional peak currents.
• DIN-rail mounting for modular panel installation.
• Designed to meet UL 489 requirements.

High-Performance Protection for Inrush Loads

The ABB S800U range is engineered for electrical systems requiring high-performance branch-circuit protection and substantial short-circuit interruption capability. The S802U-K90 combines thermal overload protection with electromagnetic short-circuit tripping to help protect conductors, equipment and downstream circuits from damaging overcurrents.

Its K characteristic is particularly useful for equipment that can draw elevated current during starting or energisation. This makes the S802U-K90 suitable for motors, transformers, industrial machinery and other loads where reliable operation must be balanced with effective circuit protection.

Typical Applications

• Industrial electrical distribution panels.
• Industrial control and automation systems.
• Motor and machinery circuits.
• Transformer and auxiliary circuits.
• Circuits with functional peak or inrush currents.
• Commercial electrical distribution equipment.
• Branch circuits requiring UL 489 protection.
• Applications with high prospective short-circuit currents.