2CDS271445R0201 ABB S201MT-D20 MCB 10 kA 1P Type D 20 A

Why Choose the ABB S201MT-D20 Miniature Circuit Breaker?

The ABB S201MT-D20 is a high-performance single-pole miniature circuit breaker (MCB) designed to protect cables and electrical circuits against overloads and short circuits in demanding industrial, railway and traction applications. As part of the specialised ABB S200 MT series, it combines a 20 A rated current, Type D tripping characteristic and 10 kA short-circuit breaking capacity in a compact DIN-rail-mounted format.

Developed specifically for transportation and rolling-stock electrical systems, the S200 MT range provides dependable circuit protection while meeting stringent railway requirements. The series complies with IEC/EN 60898-1 and IEC/EN 60947-2 and meets railway-related fire, shock and vibration requirements, making it suitable for electrical installations exposed to demanding operating conditions.

With a rated current of 20 A, a Type D tripping characteristic and a short-circuit breaking capacity of 10 kA, the S201MT-D20 is particularly suited to circuits where high temporary starting or inrush currents can occur. Its compact 17.5 mm single-pole construction enables straightforward integration into electrical distribution boards, control panels and traction equipment.

Key Advantages

• Specialised miniature circuit breaker for traction and railway applications.
• 20 A rated current for auxiliary, distribution and equipment circuits.
• Type D tripping characteristic suitable for loads with high starting or inrush currents.
• 10 kA short-circuit breaking capacity for robust fault protection.
• Railway-oriented construction designed for demanding fire, shock and vibration requirements.
• Compact 17.5 mm single-module design for efficient DIN-rail installation.

Key Features

• ABB S200 MT series miniature circuit breaker.
• 20 A rated current.
• Type D tripping characteristic.
• Single-pole (1P) configuration.
• 10 kA short-circuit breaking capacity.
• 230 / 400 V AC rated operational voltage.
• 50 / 60 Hz rated frequency.
• Designed for overload and short-circuit protection of cables and conductors.
• Complies with IEC/EN 60898-1 and IEC/EN 60947-2.
• Meets EN 45545 R26/HL3 railway fire protection requirements.
• Meets IEC 61373 Category 1 Class A/B shock and vibration requirements.

Reliable Circuit Protection for Traction and High-Inrush Loads

Miniature circuit breakers such as the ABB S201MT-D20 automatically disconnect a circuit when excessive current occurs as a result of an overload or short circuit. This helps protect cables, conductors and connected electrical equipment while providing a convenient resettable alternative to conventional fuse-based protection.

The ABB S200 MT series is engineered for demanding transportation and industrial environments. The Type D characteristic provides increased tolerance of temporary inrush currents, making the S201MT-D20 particularly useful for circuits supplying motors, transformers, solenoids and other inductive equipment while maintaining dependable overload and short-circuit protection.

Typical Applications

• Railway and rolling-stock electrical systems.
• Traction auxiliary electrical circuits.
• Industrial control and distribution systems.
• Circuits with high starting or inrush currents.
• Motors, transformers, solenoids and inductive loads.
• Control panels and electrical cabinets.
• Cable and conductor overload protection.