Why Choose the ABB S203MT-K6NA Miniature Circuit Breaker?
The ABB S203MT-K6NA is a high-performance miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for low-voltage electrical installations. As part of the ABB S200MT miniature circuit breaker range, it has been specifically developed for demanding industrial, traction and railway applications where dependable protection and long service life are essential.
Featuring a K curve tripping characteristic, the S203MT-K6NA is well suited to circuits with higher inrush currents, including transformers, motors and other inductive loads. Its current limiting design reduces fault energy, helping protect connected equipment while improving overall electrical safety.
With a rated current of 6 A and a 3-pole plus neutral configuration, this ABB circuit breaker is ideal for protecting three-phase systems requiring a switched neutral conductor. The modular DIN rail design allows fast installation within distribution boards, control panels and switchgear assemblies.
Key Advantages
- Compact miniature circuit breaker for circuit protection.
- 6 A rated current for low-current electrical circuits.
- 3-pole plus neutral configuration for three-phase systems.
- K curve tripping characteristic for circuits with higher inrush currents.
- 10 kA breaking capacity for dependable fault protection.
- DIN rail mounting for quick installation in electrical enclosures.
Key Features
- ABB S200MT miniature circuit breaker series.
- 6 A nominal current rating.
- 3 protected poles plus neutral.
- K type tripping curve for inductive loads.
- Thermal overload protection.
- Electromechanical short-circuit protection.
- Current limiting class 3 performance.
- Compatible with ABB System pro M compact accessories.
The ABB S203MT-K6NA automatically disconnects the electrical supply whenever overload or short-circuit conditions occur, helping prevent damage to cables, switchgear and connected equipment. Its current limiting performance minimises fault energy while improving operational safety.
Designed especially for railway and traction applications, the S200MT range complies with international standards and offers excellent reliability for demanding industrial environments.
Typical Applications
- Industrial automation and control panels.
- Railway and rolling stock electrical systems.
- Distribution boards and switchgear assemblies.
- Motor control and transformer circuits.
- Machine building and OEM equipment.
- Commercial and industrial low-voltage installations.
