ABB 2CDS381001R0577 S301P-K50 single-pole miniature circuit breaker with a 50 A rated current, Type K tripping characteristic and breaking capacity of up to 25 kA for industrial circuit protection.
£62.75
The ABB 2CDS381001R0577, also identified as the ABB S301P-K50, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the advanced ABB System pro M compact S300P series, it provides dependable circuit protection where high breaking capacity and reliable operation are essential.
This single-pole circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromagnetic tripping mechanism for rapid short-circuit protection. Its compact modular design allows straightforward installation on a standard DIN rail, while compatibility with System pro M compact accessories supports flexible integration into control panels and distribution systems.
With a rated current of 50 A, a Type K tripping characteristic and a breaking capacity of up to 25 kA, the ABB 2CDS381001R0577 is particularly suitable for circuits supplying motors, transformers and other inductive loads that may generate elevated starting currents.
Miniature circuit breakers such as the ABB S301P-K50 automatically disconnect electrical circuits when overload or short-circuit conditions occur. This helps protect cables, machinery and connected equipment while reducing the risk of damage, unplanned downtime and electrical hazards.
The Type K tripping characteristic accommodates the temporary current surges generated when motors, transformers and other inductive loads start. This helps prevent unnecessary tripping while maintaining reliable protection against sustained overloads and dangerous fault currents.
| Current | 50 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Extended product type | S301P-K50 |
| Model | 2CDS381001R0577 |
| Product type | Miniature Circuit Breaker (MCB) |
| Number of poles | 1 |
| Number of protected poles | 1 |
| Rated current | 50 A |
| Tripping characteristic | Type K |
| Rated AC voltage | Up to 415 V AC |
| Rated DC voltage | Up to 125 V DC |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA |
| Rated insulation voltage | 500 V |
| Mounting type | 35 mm DIN rail |
| Protection rating | IP20; up to IP40 when installed in a suitable enclosure |
| Overvoltage category | IV |
| Pollution degree | 3 |
| Dimensions (H × W × D) | approx. 88 × 17.5 × 69 mm |
| EAN | 4016779079990 |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 and applicable UL standards |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It is used to protect industrial electrical circuits against overloads and short circuits, particularly circuits supplying motors, transformers and other inductive equipment.
The ABB 2CDS381001R0577 has a rated current of 50 A.
A Type K circuit breaker is designed to tolerate the temporary inrush currents associated with motors, transformers and inductive loads while still providing effective overload and short-circuit protection.
The circuit breaker provides a breaking capacity of up to 25 kA, depending on the applicable voltage and product standard.
The single-pole circuit breaker is designed for mounting on a standard 35 mm DIN rail inside a suitable electrical control panel or distribution enclosure.
ABB System pro M compact miniature circuit breakers are widely specified by electrical engineers, panel builders and machine manufacturers for dependable protection, high fault-breaking performance and straightforward integration into industrial electrical systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...