Why Choose the ABB S203-K3NA Miniature Circuit Breaker?
The ABB S203-K3NA is a high-quality 3P+N miniature circuit breaker (MCB) from the proven ABB System pro M compact S200 series. Engineered to provide dependable overload and short circuit protection, it is designed for industrial machinery, OEM equipment, automation systems and commercial electrical installations where reliable circuit protection is essential.
Featuring a K tripping characteristic and a 3 A rated current, the S203-K3NA is ideal for protecting circuits with elevated inrush currents. It is particularly well suited to motors, transformers, solenoids, contactors and other inductive loads where conventional MCBs may nuisance trip during start-up. Its advanced current-limiting design helps reduce fault energy and protect connected equipment.
With a 3P+N configuration and a 6 kA rated short circuit breaking capacity to IEC/EN 60898-1, the S203-K3NA delivers dependable protection while maintaining a compact DIN rail mounted format that integrates easily into modern switchboards and control panels.
Key Advantages
- Reliable 3P+N miniature circuit breaker for industrial applications.
- 3 A rated current for low-current power and control circuits.
- K curve tripping characteristic for inductive loads with higher inrush currents.
- 6 kA breaking capacity for commercial and industrial installations.
- Current-limiting construction reduces electrical stress during faults.
- DIN rail mounting for quick installation and maintenance.
Key Features
- ABB System pro M compact S200 series.
- 3 A rated current.
- K tripping characteristic.
- 3 protected poles plus switched neutral (3P+N).
- 6 kA rated breaking capacity.
- Thermal overload and electromagnetic short circuit protection.
- Current limiting class 3.
- Compact DIN rail mounted modular design.
Reliable Circuit Protection for Industrial Control Systems
The ABB S203-K3NA protects electrical circuits by combining delayed thermal overload protection with rapid electromagnetic short circuit protection. This dual protection mechanism helps minimise damage to cables, switchgear and connected equipment while maintaining reliable system operation.
Its K characteristic makes it particularly suitable for motors, transformers and inductive loads that generate higher starting currents. The compact modular design also allows easy integration into industrial control panels, automation systems and commercial distribution boards.
Typical Applications
- Industrial control panels.
- Motor starter circuits.
- Transformer protection.
- Machine building and OEM equipment.
- Automation systems.
- Commercial electrical distribution.
