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2CSR256140R3065 ABB DS203NCB6A300 DS203NC B6 A300 3P+N Type A RCBO 6A 300mA
ABB DS203NCB6A300 is a 3P+N Type A RCBO with 6 A rated current, B tripping characteristic, 300 mA residual-current sensitivity and 6 kA breaking capacity for three-phase circuit protection.
£181.35
Why Choose the ABB DS203NCB6A300 RCBO?
The ABB DS203NCB6A300 is a compact and reliable 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase electrical circuits against overloads, short circuits and residual earth-fault currents. As part of the ABB DS203NC series, it combines residual-current and overcurrent protection within a space-saving four-module device for modern electrical distribution systems.
This RCBO features a 6 A rated current, B tripping characteristic and Type A residual-current detection. Type A protection detects sinusoidal AC residual currents as well as pulsating DC residual currents, providing appropriate residual-current protection for a broad range of electrical loads containing electronic components.
With a rated residual operating current of 300 mA, a 415 V AC rated operating voltage and a rated short-circuit breaking capacity of 6 kA according to EN/IEC 61009, the DS203NCB6A300 provides comprehensive protection in a compact DIN-rail format. Its 3P+N configuration incorporates three protected poles and a switched neutral, making it suitable for three-phase distribution circuits requiring combined overcurrent and earth-fault protection.
Key Advantages
- Combined residual-current, overload and short-circuit protection in one device.
- 3P+N configuration for three-phase circuits with neutral.
- 6 A rated current with B tripping characteristic.
- 300 mA Type A residual-current sensitivity.
- 6 kA rated short-circuit breaking capacity according to EN/IEC 61009.
- Compact four-module construction helps minimise distribution-board space.
- DIN-rail mounting simplifies installation in modular electrical distribution equipment.
- Suitable for commercial and industrial three-phase circuit protection.
Key Features
- ABB DS203NC RCBO series.
- 3P+N configuration with three protected poles.
- 6 A rated current.
- B tripping characteristic.
- Type A residual-current detection.
- 300 mA rated residual operating current.
- 415 V AC rated operating voltage.
- 50/60 Hz rated frequency.
- 6 kA Icn breaking capacity according to EN/IEC 61009.
- 10 kA breaking capacity according to IEC 60947-2.
- IP2X protection rating.
- Compact four-module DIN-rail design.
Reliable Protection for Three-Phase Electrical Circuits
RCBOs combine the protective functions of a miniature circuit breaker and residual-current device in a single unit. The ABB DS203NCB6A300 protects conductors and connected equipment against overload and short-circuit conditions while monitoring for residual currents to earth, providing coordinated protection within one compact modular device.
The ABB DS203NC series is designed to maximise protection while reducing installation space. The DS203NCB6A300 occupies four DIN modules and provides three protected poles plus a switched neutral, making it a practical solution for three-phase distribution boards where compact combined overcurrent and residual-current protection is required.
Typical Applications
- Three-phase commercial electrical distribution systems.
- Industrial electrical distribution boards.
- Machinery and automation power circuits.
- Three-phase circuits requiring Type A residual-current protection.
- Circuits requiring combined overload, short-circuit and earth-fault protection.
- Compact switchboards and modular DIN-rail distribution equipment.
Technical Specifications
| Series | DS203NC |
|---|---|
| SKU | DS203NCB6A300 |
| ABB order code | 2CSR256140R3065 |
| EAN | 8012542079521 |
| Product type | Residual current circuit breaker with overcurrent protection (RCBO) |
| Number of poles | 3P+N / 4 poles |
| Protected poles | 3 |
| Rated current | 6 A |
| Tripping characteristic | B |
| Residual-current type | Type A |
| Rated residual operating current | 300 mA |
| Rated operating voltage | 415 V AC |
| Frequency | 50/60 Hz |
| Rated short-circuit breaking capacity Icn | 6 kA |
| Breaking capacity to IEC 60947-2 | 10 kA |
| Rated insulation voltage Ui | 500 V |
| Rated impulse withstand voltage Uimp | 4 kV |
| Energy limiting class | 3 |
| Overvoltage category | III |
| Pollution degree | 2 |
| Protection rating | IP2X |
| Operating temperature | -25 to +55 °C |
| Mounting type | DIN rail |
| Width | 4 modules / 71 mm |
| Dimensions (H × W × D) | 85 × 71 × 69 mm |
| Weight | approx. 0.48 kg |
| Standards | IEC/EN 61009-1, IEC/EN 61009-2-1 |
Frequently Asked Questions
What is the ABB DS203NCB6A300 used for?
The ABB DS203NCB6A300 is a 3P+N RCBO designed to protect three-phase electrical circuits against overloads, short circuits and residual earth-fault currents.
What is the rated current and trip characteristic of the DS203NCB6A300?
The RCBO has a rated current of 6 A and uses a B tripping characteristic.
What residual-current protection does this RCBO provide?
The DS203NCB6A300 provides Type A residual-current protection with a rated residual operating current of 300 mA.
What is the breaking capacity of the ABB DS203NCB6A300?
The device has a rated short-circuit breaking capacity Icn of 6 kA according to EN/IEC 61009 and a 10 kA breaking capacity according to IEC 60947-2.
How much space does the DS203NCB6A300 require?
The DS203NCB6A300 has a compact four-module width of 71 mm, combining 3P+N residual-current and overcurrent protection in a space-efficient DIN-rail device.
Trusted ABB Circuit Protection
ABB DS203NC RCBOs combine residual-current and overcurrent protection in a compact four-module format, providing dependable circuit protection for modern three-phase commercial and industrial electrical installations.
