Why Choose the ABB S303P-K3 Miniature Circuit Breaker?
The ABB S303P-K3 is a premium three-pole miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial, commercial and OEM electrical installations. As part of the proven ABB System pro M compact S300P series, it delivers exceptional fault interruption capability, reliable operation and long service life in demanding applications.
Manufactured in accordance with international IEC, UL and CSA standards, the S303P-K3 features a compact DIN rail mounted design for fast installation within switchboards, distribution boards and industrial control panels. Integrated trip indication, fail-safe terminals and compatibility with ABB System pro M accessories make installation and maintenance simple and efficient.
Featuring a 3 A rated current, a K curve tripping characteristic and a 25 kA breaking capacity, this miniature circuit breaker is ideally suited to protecting motors, transformers, solenoids and other inductive loads that experience high inrush currents during start-up.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial applications.
- 3 A rated current for reliable low-current circuit protection.
- K curve tripping characteristic optimised for motors and inductive loads.
- 25 kA breaking capacity for excellent fault protection.
- Manufactured to IEC, UL and CSA standards.
- Quick installation on standard 35 mm DIN rail.
Key Features
- ABB System pro M compact S300P series.
- 3 A rated current.
- Three protected poles.
- K curve tripping characteristic.
- 415 V AC rated operational voltage.
- 25 kA rated short-circuit breaking capacity (Icn).
- IP20 protection rating.
- 35 mm DIN rail mounting.
Optimised Protection for Motors and Inductive Loads
The ABB S303P-K3 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect wiring and connected equipment from electrical damage. Its K curve characteristic permits higher temporary starting currents while maintaining fast fault protection, making it particularly suitable for motor circuits and inductive equipment.
The ABB S300P range is trusted worldwide by panel builders, machine manufacturers and electrical contractors thanks to its outstanding reliability, high fault interruption capability and compliance with international electrical standards.
Typical Applications
- Industrial motor protection.
- Transformer circuits.
- Industrial control panels.
- Machine building and OEM equipment.
- Automation systems.
- Commercial and industrial electrical distribution.
