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2CSR256140R1105 ABB DS203NCB10A30 RCBO 3P+N B10 Type A 30mA 6kA
ABB DS203NCB10A30 is a 10 A 3P+N Type B RCBO with 30 mA Type A residual-current protection, 400–415 V AC operation and a 6 kA rated short-circuit breaking capacity.
£164.87
Why Choose the ABB DS203NCB10A30 RCBO?
The ABB DS203NCB10A30 is a compact 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase end-user circuits against overloads, short circuits and residual earth-fault currents. Part of the ABB DS203NC series, it combines residual-current and overcurrent protection within a single four-module device for efficient commercial and industrial electrical distribution.
This RCBO has a rated current of 10 A, a Type B tripping characteristic and a rated residual operating current of 30 mA. Its Type A residual-current characteristic detects sinusoidal alternating and pulsating DC residual currents, providing protection for modern electrical circuits where these residual-current waveforms may occur.
With a rated operational voltage of 400–415 V AC and a rated short-circuit breaking capacity of 6 kA, the DS203NC B10 A30 provides integrated protection for three-phase plus neutral circuits. Its 30 mA residual-current sensitivity provides protection against indirect contact and additional protection against direct contact in suitable installations.
Key Advantages
- Combined residual-current, overload and short-circuit protection in one device.
- 10 A rated current with Type B tripping characteristic.
- 30 mA residual-current sensitivity for additional protection in suitable installations.
- Type A residual-current detection for sinusoidal AC and pulsating DC residual currents.
- 3P+N configuration for three-phase plus neutral circuits.
- 6 kA rated short-circuit breaking capacity.
Key Features
- ABB DS203NC RCBO series.
- 10 A rated current.
- Type B tripping curve.
- 30 mA rated residual operating current.
- Type A residual-current characteristic.
- Detection of sinusoidal alternating and pulsating DC residual currents.
- 3P+N four-pole configuration.
- 400–415 V AC rated operational voltage.
- 6 kA rated short-circuit breaking capacity (Icn).
- 500 V rated insulation voltage (Ui).
- 4 kV rated impulse withstand voltage (Uimp).
- Compact four-module DIN-rail design.
Reliable Type A Protection for Three-Phase Circuits
The ABB DS203NCB10A30 combines overcurrent and residual-current protection within one modular device. Its overcurrent function protects against overload and short-circuit currents, while its Type A residual-current function responds to sinusoidal alternating and pulsating DC earth-fault currents that can occur in modern electrical installations.
With a residual-current sensitivity of 30 mA, the DS203NCB10A30 provides protection against indirect contact and additional protection against direct contact where applicable. Its Type B tripping characteristic, 3P+N configuration and compact four-module construction make it a practical solution for suitable commercial and industrial three-phase distribution circuits.
Typical Applications
- Three-phase end-user electrical circuits.
- Commercial electrical distribution boards.
- Industrial electrical distribution systems.
- Control panels and switchboards.
- Circuits containing equipment capable of producing pulsating DC residual currents.
- Three-phase circuits requiring combined Type B overcurrent and Type A residual-current protection.
Technical Specifications
| Series | DS203NC |
|---|---|
| SKU | DS203NCB10A30 |
| ABB order code | 2CSR256140R1105 |
| Product group | DS200 / DSH200 RCBO |
| Product type | Residual current circuit breaker with overcurrent protection (RCBO) |
| Rated current | 10 A |
| Tripping characteristic | B |
| Rated residual operating current | 30 mA |
| Residual-current type | A |
| Number of poles | 4 (3P+N) |
| Rated operational voltage | 400–415 V AC |
| Rated short-circuit breaking capacity (Icn) | 6 kA |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Energy limiting class | 3 |
| Overvoltage category | III |
| Pollution degree | 2 |
| Maximum conductor cross-section | 25 mm² |
| Operating temperature | -25 to +55 °C |
| Mounting type | DIN rail |
| Width | 4 modules / 71 mm |
| Dimensions (W × H × D) | 71 × 85 × 69 mm |
| Weight | 480 g |
| Standards | IEC 61009-1, IEC 61009-2-1, EN 61009-1, EN 61009-2-1 |
| Application | Commercial and industrial |
| EAN | 8012542078128 |
Frequently Asked Questions
What is the ABB DS203NCB10A30 used for?
The ABB DS203NCB10A30 is a 3P+N RCBO designed to protect three-phase end-user circuits against overloads, short circuits and residual earth-fault currents.
What is the rated current and tripping curve of the DS203NCB10A30?
The DS203NCB10A30 has a rated current of 10 A and uses a Type B tripping characteristic.
What residual-current protection does the DS203NCB10A30 provide?
The device has a rated residual operating current of 30 mA and uses Type A residual-current detection for sinusoidal alternating and pulsating DC residual currents.
What is the breaking capacity of the ABB DS203NCB10A30?
The DS203NCB10A30 has a rated short-circuit breaking capacity of 6 kA.
How much panel space does the DS203NCB10A30 require?
The ABB DS203NCB10A30 occupies four DIN-rail modules with a width of approximately 71 mm, integrating residual-current and overcurrent protection within a compact 3P+N device.
Trusted ABB Circuit Protection
ABB DS203NC Type A residual current circuit breakers with overcurrent protection combine compact three-phase circuit protection with detection of sinusoidal AC and pulsating DC residual currents, providing integrated protection for modern commercial and industrial electrical systems.
