2CDS272065R0337 ABB S202MT-K4UC 4 A 2-Pole Type K Miniature Circuit Breaker 10 kA

Why Choose the ABB S202MT-K4UC Miniature Circuit Breaker?

The ABB S202MT-K4UC is a high-performance 2-pole miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection in demanding AC and DC electrical systems. Part of the ABB System pro M compact S200 MT UC series, it combines universal-current circuit protection with construction developed for industrial, traction and rolling-stock installations.

Featuring a 4 A rated current, Type K tripping characteristic and 10 kA short-circuit breaking capacity, the S202MT-K4UC is particularly suitable for circuits supplying inductive loads that can produce elevated starting currents. The K characteristic helps accommodate normal starting currents from equipment such as motors, transformers and solenoids while retaining dependable overload and short-circuit protection.

The two-pole configuration provides coordinated circuit protection across two conductors, while the S200 MT UC universal-current platform supports both AC and DC applications. Its compact modular construction, approximately 0.250 kg weight and standard DIN-rail format make it straightforward to integrate into industrial control cabinets, auxiliary distribution systems and rolling-stock electrical assemblies.

Key Advantages

• High-performance 2-pole miniature circuit breaker for AC and DC applications.
• 4 A rated current for low-current control, auxiliary and equipment circuits.
• Type K tripping characteristic suited to inductive loads with elevated starting currents.
• 10 kA short-circuit breaking capacity for robust fault protection.
• Universal-current design provides flexible AC and DC circuit protection.
• Designed for demanding industrial, traction and rolling-stock electrical systems.
• Compact modular construction simplifies integration into electrical panels.
• Supplied within ABB's established System pro M compact circuit-protection platform.

Key Features

• ABB System pro M compact S200 MT UC series.
• 2-pole configuration.
• 4 A rated current.
• Type K tripping characteristic.
• 10 kA short-circuit breaking capacity.
• Universal-current construction for AC and DC circuits.
• Thermal protection against sustained overload currents.
• Magnetic protection for rapid short-circuit disconnection.
• Designed for inductive-load and rolling-stock applications.
• Standard modular DIN-rail mounting.

Reliable Protection for Inductive and Traction Circuits

Miniature circuit breakers such as the ABB S202MT-K4UC protect electrical wiring and connected equipment against excessive current caused by overload and short-circuit conditions. Thermal protection responds to sustained overload currents, while magnetic tripping provides rapid disconnection when a short-circuit fault occurs.

The Type K characteristic is particularly useful for circuits containing inductive equipment with elevated starting currents. This makes the S202MT-K4UC suitable for motors, transformers, solenoids and similar loads where normal energisation can create short-duration current peaks, while its S200 MT UC universal-current construction supports demanding industrial and transportation applications.

Typical Applications

• Railway and rolling-stock electrical systems.
• Traction auxiliary and control circuits.
• Industrial automation and machinery.
• Low-current motor circuits.
• Transformer and solenoid circuits.
• AC and DC control and auxiliary circuits.
• Machine building and OEM electrical equipment.