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2CSR256040R3065 ABB DS203NCB6AC300 RCBO 3P+N B6 AC 300mA 6kA
ABB DS203NCB6AC300 is a 6 A 3P+N Type AC RCBO with B-curve overcurrent protection, 300 mA residual current sensitivity and 6 kA short-circuit breaking capacity according to IEC/EN 61009 for commercial and industrial three-phase circuits.
£151.14
Why Choose the ABB DS203NCB6AC300 RCBO?
The ABB DS203NCB6AC300 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 earth fault currents. As part of the ABB DS203NC range, it combines residual current and overcurrent protection in a space-saving four-module device for commercial and industrial electrical distribution systems.
With a 6 A rated current, B tripping characteristic and 300 mA residual current sensitivity, the DS203NC B6 AC300 provides coordinated protection against overcurrent and sinusoidal alternating residual currents. Its Type AC residual current detection makes it suitable for circuits where sinusoidal AC earth leakage currents are expected.
The DS203NCB6AC300 provides a 6 kA rated short-circuit breaking capacity according to IEC/EN 61009 and operates at a rated voltage of 415 V AC. Its compact DIN-rail construction combines multiple protection functions in one device, helping simplify distribution-board design and conserve installation space.
Key Advantages
- Combined residual current and overcurrent protection in one compact device.
- 6 A rated current for lower-current three-phase circuits.
- B tripping characteristic for dependable overload and short-circuit protection.
- 300 mA residual current sensitivity for earth fault protection.
- Type AC detection for sinusoidal alternating residual currents.
- 6 kA rated short-circuit breaking capacity according to IEC/EN 61009.
- Compact 3P+N four-module design helps conserve DIN-rail space.
Key Features
- ABB DS203NC RCBO range.
- 3P+N configuration.
- 6 A rated current.
- B curve tripping characteristic.
- 300 mA rated residual operating current.
- Type AC residual current protection.
- 6 kA breaking capacity according to IEC/EN 61009.
- 415 V AC rated operating voltage.
- 50/60 Hz rated frequency.
- 4 kV impulse withstand voltage.
- Compact four-module DIN-rail construction.
Reliable Combined Protection for Three-Phase Circuits
An RCBO combines miniature circuit-breaker and residual current protection within a single device. The ABB DS203NC B6 AC300 therefore protects connected circuits against overload and short-circuit currents while also detecting sinusoidal alternating earth fault currents.
The DS203NC series is designed for three-phase commercial and industrial installations where comprehensive circuit protection and efficient use of distribution-board space are important. Its 3P+N configuration and compact four-module construction provide a practical solution for circuits requiring coordinated overcurrent and residual current protection.
Typical Applications
- Commercial three-phase electrical distribution systems.
- Industrial control panels and distribution boards.
- Lower-current three-phase circuits.
- Machinery and automation power distribution.
- Building services and electrical installations.
- DIN-rail switchboards requiring combined residual current and overcurrent protection.
Technical Specifications
| Series | DS203NC |
|---|---|
| ABB order code | 2CSR256040R3065 |
| EAN | 8012542353423 |
| Product group | DS200 / DSH200 RCBO |
| Product type | Residual current circuit breaker with overcurrent protection (RCBO) |
| Number of poles | 3P+N |
| Total poles | 4 |
| Rated current | 6 A |
| Tripping characteristic | B curve |
| Residual current type | AC |
| Rated residual current | 300 mA |
| Rated operating voltage | 415 V AC |
| Rated frequency | 50/60 Hz |
| Rated short-circuit breaking capacity | 6 kA according to IEC/EN 61009 |
| Rated ultimate short-circuit breaking capacity (Icu) | 10 kA |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Protection rating | IP2X |
| Dimensions (H × W × D) | 85 × 71 × 69 mm |
| Width | 4 modules |
| Weight | 0.48 kg |
| Operating temperature | -25 to +55 °C |
| Mounting type | DIN rail |
| Standards | IEC/EN 61009-1, IEC/EN 61009-2-1 |
Frequently Asked Questions
What is the ABB DS203NCB6AC300 used for?
The DS203NCB6AC300 is a 3P+N RCBO designed to protect three-phase circuits against overloads, short circuits and sinusoidal alternating earth fault currents.
What is the rated current of the DS203NCB6AC300?
The RCBO has a rated current of 6 A and uses a B tripping characteristic.
What residual current sensitivity does this RCBO provide?
The DS203NCB6AC300 has a rated residual operating current of 300 mA and provides Type AC residual current protection.
What is the breaking capacity of the ABB DS203NCB6AC300?
The device has a rated short-circuit breaking capacity of 6 kA according to IEC/EN 61009.
How much DIN-rail space does the DS203NCB6AC300 require?
The DS203NCB6AC300 is a 3P+N device with a four-module width, providing combined residual current and overcurrent protection in a compact format.
Trusted ABB Circuit Protection
ABB DS203NC RCBOs provide compact combined residual current and overcurrent protection for modern three-phase electrical installations, helping engineers achieve dependable circuit protection while making efficient use of switchboard space.
