2CDS273065R0317 ABB S203MT-K3UC MCB 10kA 3P Type K 3A

Why Choose the ABB S203MT-K3UC Miniature Circuit Breaker?

The ABB S203MT-K3UC is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in AC and DC electrical systems. As part of the ABB S200 MT UC universal-current series, it is specifically suited to demanding industrial, DC and traction applications requiring dependable circuit protection.

The S203MT-K3UC combines thermal-magnetic protection with a Type K tripping characteristic. This characteristic is particularly suitable for circuits supplying inductive loads and equipment with higher starting currents, helping prevent unwanted tripping during normal start-up conditions while maintaining effective overload and short-circuit protection.

With a rated current of 3 A, three protected poles and a rated short-circuit breaking capacity of 10 kA, the S203MT-K3UC provides robust protection for low-current AC and DC circuits. Its compact DIN rail-mounted format makes it suitable for industrial control cabinets, machinery, transportation equipment and railway or traction electrical systems.

Key Advantages

• Universal-current MCB designed for AC and DC applications.
• 3 A rated current for reliable protection of low-current circuits.
• Three-pole configuration provides protection across three conductors.
• Type K tripping characteristic suited to circuits with elevated starting or inrush currents.
• 10 kA short-circuit breaking capacity for demanding electrical installations.
• Designed for industrial, DC and traction applications.

Key Features

• ABB S200 MT UC universal-current series.
• 3 A rated current.
• Three-pole miniature circuit breaker.
• Type K thermal-magnetic tripping characteristic.
• Suitable for AC and DC circuit protection.
• 10 kA short-circuit breaking capacity.
• Suitable for inductive loads and circuits with increased starting currents.
• Compact modular construction for DIN rail mounting.

Reliable AC and DC Circuit Protection

Miniature circuit breakers such as the ABB S203MT-K3UC protect electrical circuits, conductors and connected equipment against overload and short-circuit conditions. The thermal-magnetic operating mechanism automatically disconnects the protected circuit when current exceeds defined limits, helping protect electrical equipment and wiring from damage.

The S200 MT UC series is engineered for universal-current applications and provides flexible protection for both AC and DC systems. The Type K characteristic makes the S203MT-K3UC particularly suitable for inductive equipment and circuits that experience increased starting currents, while its robust modular construction supports use in demanding industrial and traction environments.

Typical Applications

• Railway and rolling-stock electrical systems.
• Traction and transportation equipment.
• DC electrical distribution circuits.
• Industrial AC and DC control panels.
• Inductive loads and auxiliary circuits.
• Machinery and automation equipment.