ABB S203MT-K13NA miniature circuit breaker, a 13 A 3-pole plus neutral K curve MCB from the ABB S200MT range for overload and short-circuit protection in low-voltage electrical installations.
£264.97
The ABB S203MT-K13NA is a compact and reliable miniature circuit breaker (MCB) designed to provide overload and short-circuit protection in low-voltage electrical installations. As part of the ABB S200MT miniature circuit breaker range, it is developed for demanding industrial, traction and railway applications where dependable protection and compact installation are essential.
This circuit breaker features a K curve tripping characteristic, making it suitable for circuits with higher inrush currents such as motors, control transformers, solenoids and other inductive loads. Its current limiting performance helps reduce fault energy, supporting safer operation and improved protection for cables, switchgear and connected equipment.
With a rated current of 13 A and a 3-pole plus neutral configuration, the ABB S203MT-K13NA is ideal for three-phase systems where the neutral conductor must switch together with the protected phases. Its DIN rail mounting format allows fast installation inside control panels, distribution boards, switchgear cabinets and machinery enclosures.
Miniature circuit breakers such as the ABB S203MT-K13NA protect electrical circuits by automatically disconnecting the supply when overload or short-circuit faults occur. This helps prevent cable damage, equipment failure and unsafe fault conditions in control and distribution systems.
The K curve characteristic allows higher transient inrush currents while still providing dependable short-circuit protection. This makes the S203MT-K13NA suitable for circuits supplying motors, transformers, contactor coils and other inductive equipment where nuisance tripping should be avoided during normal start-up conditions.
| Current | 13 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K13NA |
| Order code | 2CDS273106R0447 |
| Product type | Miniature circuit breaker |
| Rated current | 13 A |
| Number of poles | 3 protected poles + neutral |
| Total pole configuration | 4 pole |
| Tripping characteristic | K curve |
| Rated voltage | 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA |
| Current limiting class | Class 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Built-in depth | approx. 69 mm |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MT-K13NA is used to protect low-voltage electrical circuits against overloads and short circuits, particularly in control panels, distribution boards, railway systems and inductive load applications.
This miniature circuit breaker has a rated current of approximately 13 A.
It means the device has three protected poles for phase conductors and an additional neutral pole that switches with the circuit.
The K curve is designed to tolerate higher inrush currents, making it suitable for motors, transformers and inductive loads while still providing short-circuit protection.
The ABB S203MT-K13NA is typically installed on DIN rail inside electrical control panels, distribution boards, switchgear cabinets and machinery enclosures.
ABB S200MT miniature circuit breakers are widely used by panel builders, railway system engineers and electrical installers to deliver dependable circuit protection in demanding low-voltage applications.
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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...