Why Choose the ABB S303P-K25 Miniature Circuit Breaker?
The ABB S303P-K25 (2CDS383001R0517) is a high-performance three-pole miniature circuit breaker (MCB) designed to protect demanding industrial electrical installations against overloads and short circuits. As part of the robust ABB S300P series, it combines dependable switching performance, high fault-breaking capability and durable construction for critical three-phase applications.
Manufactured in accordance with recognised IEC and UL standards, the S303P-K25 is suitable for integration into industrial control panels, switchgear assemblies and power distribution systems. Its compact modular format supports efficient DIN rail installation, while fail-safe terminals help provide secure and reliable conductor connections.
With a rated current of 25 A, a Type K tripping characteristic and a rated short-circuit breaking capacity of 25 kA, this circuit breaker is particularly well suited to motors, transformers, solenoids and other inductive loads that produce elevated starting currents.
Key Advantages
- Dependable overload and short-circuit protection.
- 25 A rated current for industrial three-phase circuits.
- Type K tripping characteristic accommodates high starting currents.
- 25 kA breaking capacity for demanding fault conditions.
- Three protected poles provide coordinated three-phase protection.
- Compact DIN rail format simplifies panel installation.
Key Features
- ABB S300P series.
- Three-pole configuration.
- 25 A rated current.
- Type K tripping characteristic.
- Rated operating voltage up to 415 V AC.
- Rated operating voltage up to 125 V DC.
- 25 kA rated short-circuit breaking capacity.
- Fail-safe screw terminals help prevent incorrect conductor insertion.
- Supply connection possible from the top or bottom.
- Compatible with ABB System pro M Compact accessories.
Reliable Protection for Motors and Inductive Loads
The ABB S303P-K25 automatically disconnects the electrical supply when excessive current is caused by an overload or short circuit. This helps protect cables, motors and connected equipment while reducing the risk of electrical damage, production interruptions and unplanned downtime.
Its Type K characteristic accommodates the elevated inrush currents commonly produced when motors, transformers and other inductive devices start. This helps minimise nuisance tripping while maintaining reliable protection during genuine fault conditions.
Typical Applications
- Three-phase motor circuits.
- Transformers and inductive loads.
- Industrial control panels.
- Machine building and OEM equipment.
- Manufacturing and automation systems.
- Industrial power distribution boards.
