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2CSR256240R3164 ABB DS203NCC16AS300 RCBO 3P+N C16 Type A Selective 300 mA
ABB DS203NCC16AS300 is a 16 A 3P+N C-curve Type A selective RCBO with 300 mA residual current sensitivity and 6 kA short-circuit capacity for coordinated three-phase circuit protection.
£197.76
Why Choose the ABB DS203NCC16AS300 RCBO?
The ABB DS203NCC16AS300 is a compact and reliable 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to provide combined protection against overloads, short circuits and earth leakage currents in three-phase electrical installations. As part of the ABB DS203NC series, it combines residual current and overcurrent protection within a compact modular device, helping simplify distribution board design and circuit protection.
This RCBO features a Type C tripping characteristic, a 16 A rated current and Type A selective residual current protection. The selective, time-delayed residual current characteristic is designed to improve discrimination with downstream residual current devices, while Type A detection responds to sinusoidal AC and pulsating DC residual currents.
With a rated residual operating current of 300 mA and a rated short-circuit capacity of 6 kA, the DS203NCC16AS300 provides dependable circuit and earth-fault protection for three-phase systems. Its selective residual current operation makes it particularly useful where coordinated protection between upstream and downstream devices is required.
Key Advantages
- Combined residual current and overcurrent protection in one RCBO.
- 3P+N configuration for three-phase circuits with neutral.
- 16 A rated current with Type C tripping characteristic.
- 300 mA Type A selective residual current protection.
- Selective time-delayed operation supports coordination with downstream RCDs and RCBOs.
- 6 kA rated short-circuit capacity.
- DIN-rail design for modular electrical distribution systems.
Key Features
- ABB DS203NC RCBO series.
- 16 A rated current.
- Type C tripping characteristic.
- Type A selective (S) residual current characteristic.
- 300 mA rated residual operating current.
- 3P+N configuration.
- 6 kA rated short-circuit capacity.
- Protection against overload, short-circuit and residual earth-fault currents.
- Suitable for coordinated residual current protection schemes.
- DIN-rail mounting for distribution boards and control panels.
Selective Circuit and Residual Current Protection
RCBOs such as the ABB DS203NC combine the functions of a miniature circuit breaker and residual current protective device in a single unit. This allows one device to protect a circuit against overload and short-circuit conditions while also detecting residual currents caused by insulation faults or leakage to earth.
The DS203NCC16AS300 adds selective Type S operation to Type A residual current detection. Its intentional time delay supports discrimination with downstream residual current protective devices, helping the device closest to a fault operate first and reducing unnecessary interruption of unaffected circuits when the installation is correctly coordinated.
Typical Applications
- Three-phase electrical distribution boards.
- Commercial and industrial electrical installations.
- Upstream residual current protection.
- Installations requiring selective coordination with downstream RCDs or RCBOs.
- Machinery and automation control panels.
- Building services and electrical distribution systems.
Technical Specifications
| Series | DS203NC |
|---|---|
| Product group | DS200 / DSH200 RCBO |
| ABB order code | 2CSR256240R3164 |
| Product type | Residual current circuit breaker with overcurrent protection (RCBO) |
| Number of poles | 3P+N |
| Rated current | 16 A |
| Tripping characteristic | C curve |
| Residual current type | Type A |
| Residual current characteristic | Selective / Type S |
| Rated residual operating current | 300 mA |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit capacity | 6 kA |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 4 kV |
| Protection rating | IP2X |
| Pollution degree | 2 |
| Overvoltage category | III |
| Energy limiting class | 3 |
| Residual current operation | Time-delayed / selective |
| Neutral conductor switching | Yes |
| Terminal capacity | up to 25 mm² |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB DS203NCC16AS300 used for?
The ABB DS203NCC16AS300 is a 3P+N selective RCBO used to protect three-phase electrical circuits against overloads, short circuits and residual earth-fault currents.
What is the current rating of the DS203NCC16AS300?
The DS203NCC16AS300 has a rated current of 16 A and uses a Type C tripping characteristic.
What residual current sensitivity does this RCBO provide?
This model has a rated residual operating current of 300 mA and provides Type A selective residual current protection.
What does the selective Type S characteristic mean?
The Type S selective characteristic introduces a time delay in residual current operation to support discrimination with downstream residual current protective devices.
What is the short-circuit rating of the ABB DS203NCC16AS300?
The DS203NCC16AS300 has a rated short-circuit capacity of 6 kA.
Trusted ABB Circuit Protection
ABB DS203NC residual current circuit breakers with overcurrent protection combine compact modular construction with dependable overload, short-circuit and residual current protection for modern three-phase electrical distribution systems.
