2CDS272445R0321 ABB S202MT-D32 32A 2-Pole Type D 10kA Miniature Circuit Breaker

Why Choose the ABB S202MT-D32 Miniature Circuit Breaker?

The ABB S202MT-D32 is a robust two-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding railway, rolling stock and traction electrical systems. Part of the specialised ABB S200 MT series, this model combines a 32 A rated current, Type D tripping characteristic and 10 kA rated short-circuit capacity.

The S200 MT range is developed specifically for railway applications, providing dependable protection for cables and conductors while meeting demanding requirements associated with rolling stock installations. The S202MT-D32 protects two poles and uses thermal-magnetic operation to disconnect the circuit automatically in response to sustained overloads or high-current short-circuit faults.

With a 400 V rated voltage, 440 V insulation voltage and Type D characteristic, the S202MT-D32 is particularly suitable for circuits containing equipment with substantial starting or inrush currents. Its compact two-module DIN-rail format simplifies integration into electrical distribution equipment, while ABB order code 2CDS272445R0321 uniquely identifies this 32 A version.

Key Advantages

• Specialised miniature circuit breaker for railway and traction applications.
• 32 A rated current with two protected poles.
• Type D tripping characteristic suited to circuits with high starting and inrush currents.
• 10 kA rated short-circuit capacity at 230 / 400 V according to EN 60898.
• 15 kA ultimate breaking capacity at 230 / 400 V according to IEC 60947-2.
• Thermal-magnetic operation provides overload and short-circuit protection.
• Wide -40 to +70 °C operating temperature range for demanding environments.
• Compact two-module DIN-rail construction simplifies installation in distribution and control equipment.

Key Features

• ABB S200 MT series miniature circuit breaker.
• 32 A rated current.
• 2-pole configuration with two protected poles.
• Type D tripping characteristic.
• 10 kA Icn rated short-circuit capacity.
• 400 V rated voltage.
• 440 V rated insulation voltage (Ui).
• 4 kV rated impulse withstand voltage (Uimp).
• 50–60 Hz frequency range.
• Energy limiting class 3.
• IP20 protection rating.
• Connection capacity up to 35 mm² solid or 25 mm² stranded conductors.
• DIN-rail mounting with a compact two-module width.
• ABB order code 2CDS272445R0321.

Reliable Circuit Protection for Railway and Traction Systems

Miniature circuit breakers such as the ABB S202MT-D32 protect cables, conductors and connected equipment against excessive current caused by overloads and short circuits. The thermal release responds to sustained overload conditions, while the magnetic release provides rapid circuit interruption when a high fault current occurs.

The Type D characteristic is particularly useful for loads that can produce substantial temporary inrush currents during normal start-up, including motors, transformers and other inductive equipment. Combined with the specialised S200 MT platform, this makes the S202MT-D32 well suited to dependable protection in rolling stock, railway auxiliary systems and demanding electrical installations.

Typical Applications

• Railway rolling stock electrical distribution systems.
• Traction auxiliary electrical circuits.
• Train control and equipment cabinets.
• Motor circuits with high starting currents.
• Transformers and inductive electrical loads.
• Industrial control and automation equipment.
• DIN-rail electrical distribution and protection assemblies.