2CDS271446R0201 ABB S201MT-D20NA MCB 10kA 1P+N Type D 20A

Why Choose the ABB S201MT-D20NA Miniature Circuit Breaker?

The ABB S201MT-D20NA is a specialist 1P+N miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short-circuits. Part of the ABB S200 MT series, it is developed for demanding railway, rolling-stock and traction electrical installations where dependable circuit protection and phase-and-neutral switching are required.

Featuring a 20 A rated current, Type D tripping characteristic and 10 kA breaking capacity, the S201MT-D20NA provides robust protection for circuits supplying equipment with comparatively high starting or inrush currents. The Type D characteristic helps accommodate short-duration current peaks associated with suitable inductive and high-inrush loads while retaining effective overload and short-circuit protection.

The 1P+N configuration combines overcurrent protection of the phase conductor with switching of the neutral conductor, allowing phase and neutral to be disconnected together. Its compact DIN-rail construction supports efficient integration into rolling-stock distribution boards, auxiliary systems, control assemblies and industrial electrical panels.

Key Advantages

• 20 A rated current for dependable branch and auxiliary circuit protection.
• 1P+N configuration combines phase protection with neutral switching.
• Type D tripping characteristic suited to appropriate loads with comparatively high starting or inrush currents.
• 10 kA breaking capacity provides robust short-circuit fault interruption.
• Specialist S200 MT design for railway and traction applications.
• Protects electrical circuits against both overloads and short-circuits.
• Compact DIN-rail construction supports straightforward installation in distribution and control assemblies.

Key Features

• ABB S200 MT miniature circuit breaker series.
• 1P+N pole configuration.
• 20 A rated current.
• Type D tripping characteristic.
• 10 kA short-circuit breaking capacity.
• Protected phase pole with switched neutral.
• Overload and short-circuit circuit protection.
• Suitable for appropriate circuits with high short-duration inrush currents.
• Compact modular construction for electrical panels.
• Designed for demanding railway, rolling-stock and traction applications.

Reliable Protection for High-Inrush Traction and Auxiliary Circuits

Miniature circuit breakers such as the ABB S201MT-D20NA automatically interrupt a circuit when excessive current caused by an overload or short-circuit occurs. This helps protect conductors, connected equipment and electrical distribution systems while providing a resettable protective solution that can be returned to service after the fault has been safely cleared.

The S201MT-D20NA combines a 20 A rating with a Type D characteristic and switched neutral pole. This configuration is particularly useful for suitable auxiliary, control and distribution circuits where significant short-duration inrush currents may occur and simultaneous disconnection of phase and neutral is required.

Typical Applications

• Railway and rolling-stock electrical systems.
• Traction auxiliary and control circuits.
• Circuits supplying suitable high-inrush electrical loads.
• Industrial control and automation panels.
• Electrical distribution and branch circuits.
• Phase-and-neutral circuit protection and isolation.