ABB S203MT-K32NAH10 miniature circuit breaker with K characteristic, 32 A rated current, 3P+N configuration and 10 kA breaking capacity for industrial, railway and automation applications.
The ABB S203MT-K32NAH10 is a robust three-pole plus neutral (3P+N) miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection for industrial, railway and transportation electrical systems. As part of the specialist ABB S200MT series, it delivers reliable protection for demanding low-voltage installations where safety and long service life are essential.
Featuring a K tripping characteristic, this miniature circuit breaker is ideal for circuits with elevated inrush currents, including motors, transformers, contactors and other inductive loads. Its carefully engineered tripping characteristics help reduce nuisance tripping while maintaining effective protection for connected equipment and wiring.
With a 32 A rated current, 3P+N configuration and a 10 kA short-circuit breaking capacity, the ABB S203MT-K32NAH10 is ideally suited to industrial control panels, OEM machinery, railway applications and modular DIN rail distribution systems.
The ABB S203MT-K32NAH10 combines delayed thermal overload protection with rapid magnetic short-circuit protection to safeguard cables, equipment and electrical installations. Its K characteristic makes it particularly suitable for applications where temporary inrush currents occur during motor or transformer energisation.
Designed especially for traction, railway and industrial environments, the S200MT range offers dependable long-term performance, compact modular construction and compatibility with ABB System pro M Compact accessories.
| Current | 32 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K32NAH10 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 32 A |
| Tripping characteristic | K |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | Up to 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated short-circuit breaking capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
It provides overload and short-circuit protection for industrial, railway and automation circuits, particularly those supplying motors, transformers and inductive equipment.
The K characteristic is designed for circuits with higher inrush currents, making it ideal for motors, transformers, contactors and other inductive loads.
The ABB S203MT-K32NAH10 has a rated current of 32 A.
This miniature circuit breaker provides a rated short-circuit breaking capacity of 10 kA.
It is designed for DIN rail installation inside industrial control panels, distribution boards, OEM machinery and railway electrical systems.
ABB S200MT miniature circuit breakers are trusted by panel builders, railway engineers and industrial automation specialists for delivering dependable circuit protection, excellent reliability and long operational life in demanding low-voltage installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...