ABB S203MT-K2 MCB – S200M – 3P – K – 2A

Why Choose the ABB S203MT-K2 Miniature Circuit Breaker?

The ABB S203MT-K2 is a compact and dependable 3-pole miniature circuit breaker (MCB) designed for reliable overload and short-circuit protection in demanding traction, railway and industrial control applications. As part of the specialist ABB S200MT miniature circuit breaker range, it is engineered for environments where safety, durability and consistent circuit protection are essential.

This miniature circuit breaker uses a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. The K characteristic is suitable for circuits with higher inrush currents, helping reduce nuisance tripping while still providing effective protection for cables, auxiliary systems and connected equipment.

With a rated current of 2 A, a 3-pole configuration and a rated short-circuit breaking capacity of 10 kA, the S203MT-K2 is well suited to low-current three-phase control, signalling and auxiliary circuits. Its modular DIN rail format enables straightforward installation inside electrical control panels, railway cabinets and industrial distribution boards.

Key Advantages

• Compact 3-pole miniature circuit breaker for traction and railway applications.
• 2 A rated current for precise low-current circuit protection.
• K curve tripping characteristic suitable for circuits with higher inrush currents.
• 10 kA breaking capacity for dependable short-circuit protection.
• Current limiting class 3 performance helps protect downstream equipment.
• Compatible with ABB System pro M compact accessories.

Key Features

• ABB S200MT miniature circuit breaker series.
• 3-pole MCB configuration.
• 2 A rated current.
• K characteristic tripping curve.
• 10 kA rated short-circuit breaking capacity.
• Thermal and electromagnetic trip mechanisms.
• Designed for demanding traction and railway applications.
• DIN rail mounting for control panels and distribution boards.

Reliable Circuit Protection for Traction and Control Systems

Miniature circuit breakers such as the ABB S203MT-K2 protect electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. This helps reduce the risk of cable damage, equipment failure and unsafe operating conditions in critical auxiliary and control systems.

The ABB S200MT range is designed especially for traction and railway environments, offering robust protection for electrical circuits used throughout rolling stock and transport-related installations. Its compact construction, high breaking capacity and accessory compatibility make it a practical choice for engineers and panel builders.

Typical Applications

• Railway and traction electrical systems.
• Rolling stock control panels.
• Three-phase auxiliary circuits.
• Industrial control cabinets.
• Automation and signalling systems.
• Low-current motor control and protection circuits.