Why Choose the ABB 2CDS381103R0277 S301P-K2NA Miniature Circuit Breaker?
The ABB 2CDS381103R0277, also known as the S301P-K2NA, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. Part of the trusted ABB System pro M compact S300P series, it combines robust construction, compact dimensions and high fault-breaking performance for demanding power distribution and control applications.
Featuring a 2 A rated current, a Type K tripping characteristic and a high 25 kA short-circuit breaking capacity, the S301P-K2NA is particularly suitable for circuits supplying motors, transformers, solenoids, contactor coils and other inductive loads. Its Type K operating curve accommodates temporary start-up currents while maintaining dependable protection against sustained overloads and genuine fault conditions.
The 1P+N configuration switches the phase and neutral conductors together, supporting safe isolation and efficient circuit management. DIN rail mounting, fail-safe bi-directional terminals and compatibility with ABB System pro M compact accessories make this circuit breaker a practical choice for industrial panels, machinery and automation systems.
Key Advantages
- Dependable overload and short-circuit protection.
- 2 A rated current for low-current industrial circuits.
- Type K tripping characteristic for inductive loads and equipment with start-up currents.
- High 25 kA short-circuit breaking capacity.
- 1P+N configuration switches phase and neutral together.
- Compact construction helps maximise available panel space.
- Fail-safe terminals help prevent incorrect conductor insertion.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- S301P-K2NA miniature circuit breaker.
- 2 A rated current.
- Type K tripping curve.
- 1 pole plus neutral configuration.
- 240 V AC rated operational voltage.
- Suitable for specified DC circuit applications.
- 25 kA breaking capacity.
- Thermal-magnetic overload and short-circuit protection.
- DIN rail mounting with fail-safe screw terminals.
Reliable Protection for Inductive Electrical Loads
The ABB S301P-K2NA uses coordinated thermal and electromagnetic release mechanisms to protect electrical circuits. The thermal release responds to prolonged overload conditions, while the magnetic release rapidly interrupts high short-circuit currents before they can cause extensive damage to cables, equipment or switchgear.
Its Type K tripping characteristic is optimised for equipment that draws a temporary inrush current during normal operation. This makes the circuit breaker particularly useful for motor control circuits, transformers and electromagnetic devices where a more sensitive breaker could trip unnecessarily during start-up.
Typical Applications
- Industrial motor control circuits.
- Control and isolation transformers.
- Contactors and solenoid-operated equipment.
- Machine control panels.
- Industrial automation systems.
- Electrical distribution boards.
- OEM machinery and production equipment.
- Commercial and infrastructure installations.
