Why Choose the ABB 2CDS381103R0557 S301P-K40NA Miniature Circuit Breaker?
The ABB 2CDS381103R0557, designated S301P-K40NA, is a high-performance miniature circuit breaker (MCB) from the ABB System pro M Compact S300P series. Designed for demanding industrial and commercial electrical installations, it provides dependable protection against overloads and short circuits whilst delivering reliable performance for circuits supplying motors, transformers and other inductive equipment.
Manufactured in accordance with international IEC, UL and CSA standards, the S301P-K40NA features ABB's patented fail-safe terminal technology, compact DIN rail mounting and clear trip indication. Its robust construction and high interruption capability make it an excellent choice for industrial control panels, machinery and power distribution systems.
Featuring a 40 A rated current, a Type K tripping characteristic, a 1P+N configuration and a 25 kA breaking capacity, the ABB 2CDS381103R0557 is particularly suited to protecting circuits with high inrush currents whilst helping to minimise nuisance tripping.
Key Advantages
- Reliable overload and short-circuit protection for industrial electrical systems.
- 40 A rated current suitable for higher-capacity machinery and distribution circuits.
- Type K tripping characteristic designed for motors and inductive loads with high starting currents.
- 1P+N configuration protects the phase conductor whilst simultaneously switching the neutral.
- 25 kA ultimate breaking capacity for demanding industrial installations.
- Compact DIN rail design saves valuable panel space.
- ABB fail-safe screw terminals provide secure and reliable conductor connection.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB System pro M Compact S300P series.
- Extended product type: S301P-K40NA.
- 40 A rated current.
- Type K tripping characteristic.
- 1 protected pole plus switched neutral (1P+N).
- 240 V AC operating voltage.
- 72 V DC operating voltage.
- 25 kA ultimate short-circuit breaking capacity.
- Mechanical switching and trip indication.
- DIN rail mounting with screw terminals.
Type K Protection for Industrial Inductive Loads
Type K miniature circuit breakers are specifically engineered for circuits supplying motors, transformers, contactors, solenoids and other inductive equipment with elevated start-up currents. Their magnetic tripping characteristic allows temporary inrush currents whilst still providing rapid protection against genuine short-circuit faults.
The ABB S301P-K40NA combines this specialist tripping characteristic with ABB's proven S300P platform, delivering excellent interruption performance, dependable long-term reliability and reduced nuisance tripping in demanding industrial environments.
Typical Applications
- Industrial motor circuits.
- Machine building and OEM equipment.
- Industrial automation systems.
- Transformer protection.
- Industrial control panels.
- Commercial and industrial power distribution.
- Process control equipment.
- Heavy-duty electrical installations.
