Why Choose the ABB 2CDS381103R0117 Miniature Circuit Breaker?
The ABB 2CDS381103R0117, designated S301P-K0.3NA, is a specialist 1P+N miniature circuit breaker (MCB) from the ABB System pro M compact S300P range. Designed for demanding industrial control applications, it provides dependable overload and short-circuit protection for very low-current circuits whilst simultaneously switching the neutral conductor to improve electrical isolation.
The S301P-K0.3NA combines thermal overload protection with a high magnetic instantaneous trip threshold, making it particularly suitable for inductive loads that generate high inrush currents during energisation. Its integrated trip indicator, contact position indication, fail-safe terminals and dual DIN rail release provide straightforward installation, maintenance and fault identification.
With a 0.3 A rated current, a Type K tripping characteristic and a 25 kA rated short-circuit breaking capacity, this miniature circuit breaker is ideal for protecting transformers, relays, solenoids, instrumentation and other precision industrial control circuits.
Key Advantages
- 1P+N configuration with protected phase and switched neutral.
- 0.3 A rated current for specialist low-current applications.
- Type K tripping characteristic designed for high inrush inductive loads.
- 25 kA short-circuit breaking capacity for excellent fault protection.
- High resistance to nuisance tripping during equipment start-up.
- Fully compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- S301P-K0.3NA miniature circuit breaker.
- 1 protected pole with switched neutral (1P+N).
- 0.3 A rated current.
- Type K tripping characteristic.
- Thermal overload protection.
- Electromagnetic short-circuit protection.
- Integrated trip and contact position indication.
- Top or bottom supply connection.
- 35 mm DIN rail mounting.
Designed for High-Inrush Low-Current Circuits
The ABB S301P-K0.3NA is engineered for specialist industrial circuits where conventional miniature circuit breakers may trip unnecessarily during energisation. Its K characteristic allows significantly higher instantaneous current before magnetic tripping whilst maintaining reliable overload protection throughout normal operation.
This makes it particularly suitable for transformer secondary circuits, relay control systems, solenoid-operated equipment, instrumentation and precision automation installations requiring both extremely low current ratings and high short-circuit performance.
Typical Applications
- Transformer secondary protection.
- Industrial control transformers.
- Relay and contactor circuits.
- PLC control systems.
- Solenoid valve protection.
- Instrumentation and monitoring equipment.
- Laboratory automation.
- OEM machinery.
