Why Choose the ABB S203M-K20NA Miniature Circuit Breaker?
The ABB S203M-K20NA is a high-performance miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the trusted ABB System pro M compact S200M series, this device delivers reliable circuit protection for residential, commercial and industrial low-voltage installations.
This 20 amp K-curve circuit breaker incorporates delayed thermal overload protection together with electromechanical short-circuit protection, helping to safeguard cables, motors, transformers and other inductive loads. Its current-limiting design and compact DIN rail format allow safe installation and dependable long-term operation in electrical distribution systems.
With a rated current of 20 A and a 3P+N configuration, the S203M-K20NA is ideal for three-phase installations requiring neutral switching. The K tripping characteristic is specifically intended for applications with higher inrush currents, making it well suited to industrial machinery and automation systems.
Key Advantages
- Reliable miniature circuit breaker for overload and short-circuit protection.
- 20 A rated current for industrial and commercial applications.
- K curve tripping characteristic designed for motors and inductive loads.
- 3P+N pole configuration for three-phase systems with neutral.
- Compact DIN rail mounting for modern control panels.
- Manufactured to IEC/EN 60898-1 and IEC/EN 60947-2 standards.
Key Features
- ABB System pro M compact S200M series.
- 20 A rated current.
- K tripping characteristic.
- 3P+N configuration.
- Current-limiting design.
- Thermal overload and electromechanical short-circuit protection.
- 10 kA breaking capacity at 230/400 V AC.
- DIN rail mounting.
Reliable Circuit Protection for Industrial Installations
The ABB S203M-K20NA automatically disconnects electrical circuits during overload or short-circuit conditions, helping to protect wiring, motors and connected equipment from damage. Its current-limiting design reduces fault energy and improves overall system protection.
The K curve characteristic is specifically designed for applications with elevated inrush currents, making this miniature circuit breaker suitable for motor circuits, transformers, solenoids and industrial automation equipment.
Typical Applications
- Industrial motor circuits.
- Machine building and OEM equipment.
- Automation and control panels.
- Transformers and inductive loads.
- Commercial electrical distribution.
- Industrial distribution boards.
