2CDS273061R0105 ABB S203M-B10UC MCB 10 kA 3P Type B 10 A

Why Choose the ABB S203M-B10UC Miniature Circuit Breaker?

The ABB S203M-B10UC is a high-performance three-pole universal-current miniature circuit breaker (MCB) designed for reliable overload and short-circuit protection in AC and DC electrical systems. As part of the ABB System pro M compact® S200 M UC series, it combines a 10 A rated current, Type B tripping characteristic and 10 kA short-circuit breaking capacity for dependable circuit protection in industrial, control, automation and DC applications.

Designed for universal-current applications, the S203M-B10UC uses thermal-magnetic operation to protect conductors and connected equipment against sustained overloads and short circuits. Its Type B characteristic provides sensitive magnetic tripping suited to circuits with relatively low inrush currents, making it particularly useful for resistive loads, control circuits and general electrical distribution.

With a rated current of 10 A, three protected poles and a 10 kA short-circuit breaking capacity, the S203M-B10UC provides compact and versatile protection for multi-pole electrical circuits. Its modular DIN-rail format enables straightforward installation within distribution boards, switchgear and industrial control panels.

Key Advantages

• Versatile miniature circuit breaker for AC and DC applications.
• 10 A rated current suitable for control, auxiliary and distribution circuits.
• Three-pole configuration for simultaneous protection and switching of three conductors.
• Type B tripping characteristic suitable for circuits with low to moderate inrush currents.
• 10 kA short-circuit breaking capacity for robust fault protection.
• Thermal-magnetic protection against both overload and short-circuit conditions.
• Compact DIN-rail construction for easy integration into electrical panels.

Key Features

• ABB S200 M UC universal-current MCB series.
• 10 A rated current.
• 3-pole configuration.
• Type B tripping characteristic.
• 10 kA short-circuit breaking capacity.
• Designed for AC and DC circuit protection.
• Thermal-magnetic overload and short-circuit protection.
• Universal-current design for specialist electrical applications.
• Compact modular construction with a width of approximately 52.5 mm.
• DIN-rail mounting for distribution boards and control panels.
• Part of the ABB System pro M compact® circuit protection platform.

Reliable Protection for AC and DC Circuits

Miniature circuit breakers such as the ABB S203M-B10UC protect electrical conductors and connected equipment against excessive current caused by overloads and short circuits. The thermal release responds to sustained overload conditions, while the magnetic release provides rapid disconnection when a high fault current occurs.

The ABB S200 M UC range is engineered for universal-current applications and extends the System pro M compact® platform into specialist AC and DC installations. Its Type B characteristic makes the S203M-B10UC particularly appropriate where low fault-current magnetic response and reliable protection of circuits without high normal inrush currents are required.

Typical Applications

• Industrial AC and DC distribution systems.
• Control and automation panels.
• DC auxiliary and control circuits.
• Railway and transport electrical equipment.
• Resistive loads and circuits with low inrush currents.
• Electrical distribution boards and switchgear assemblies.