Why Choose the ABB S203-K16NA Miniature Circuit Breaker?
The ABB S203-K16NA is a premium 3-pole + neutral miniature circuit breaker (MCB) from the industry-leading ABB System pro M compact S200 series. Designed to provide dependable overload and short circuit protection, it is ideally suited to industrial machinery, commercial switchboards, control panels and electrical distribution systems where reliable circuit protection is essential.
Featuring a K trip characteristic, the S203-K16NA is specifically engineered for circuits with moderate inrush currents, making it an excellent choice for motors, transformers, contactors and other inductive loads. Its current limiting construction helps minimise fault energy, protecting valuable equipment while improving overall system reliability.
With a 16 A rated current, 3 protected poles plus neutral and a compact DIN rail mounted design, the ABB S203-K16NA provides fast installation and seamless compatibility with ABB auxiliary contacts, shunt trips, undervoltage releases and other System pro M compact accessories.
Key Advantages
- Reliable 3-pole + neutral miniature circuit breaker.
- 16 A rated current for industrial and commercial applications.
- K trip characteristic ideal for motors and inductive loads.
- Thermal and magnetic tripping mechanisms provide dependable protection.
- Current limiting construction reduces fault energy.
- DIN rail mounting for quick installation.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-K16NA.
- Rated current: 16 A.
- Configuration: 3 protected poles + neutral.
- K tripping characteristic.
- Thermal overload and magnetic short circuit protection.
- Current limiting energy class 3.
- DIN rail mounting.
- Failsafe bi-directional screw terminals.
- Compatible with ABB auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for Industrial Applications
The ABB S203-K16NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical installations against overloads and fault currents. Its current limiting design helps reduce the energy released during fault conditions, protecting downstream equipment and extending service life.
As part of ABB's proven System pro M compact range, the S203-K16NA delivers dependable performance, straightforward installation and long-term reliability across industrial, commercial and OEM electrical applications.
Typical Applications
- Industrial control panels.
- Motor control circuits.
- Automation systems.
- OEM machinery.
- Commercial switchboards.
- Electrical distribution systems.
