Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2CSR256040R2085 ABB DS203NCB8AC100 RCBO 3P+N B8 AC 100mA 6kA
ABB DS203NCB8AC100 is an 8 A 3P+N Type AC RCBO with B-curve overcurrent protection, 100 mA residual current sensitivity and 6 kA rated short-circuit breaking capacity for commercial and industrial three-phase circuits.
£151.14
Why Choose the ABB DS203NCB8AC100 RCBO?
The ABB DS203NCB8AC100 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 8 A rated current, B tripping characteristic and 100 mA residual current sensitivity, the DS203NC B8 AC100 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 DS203NCB8AC100 provides a 6 kA rated short-circuit breaking capacity (Icn) and is designed for 415 V AC 3P+N circuits. Its compact four-module DIN-rail format can reduce the space required compared with separate residual current and miniature circuit-breaker devices.
Key Advantages
- Combined residual current and overcurrent protection in one compact device.
- 8 A rated current for lower-current three-phase circuits.
- B tripping characteristic for dependable overload and short-circuit protection.
- 100 mA residual current sensitivity for earth fault protection.
- Type AC detection for sinusoidal alternating residual currents.
- 6 kA rated short-circuit breaking capacity.
- Compact 3P+N four-module design helps conserve DIN-rail space.
Key Features
- ABB DS203NC RCBO range.
- 3P+N configuration with three protected poles.
- 8 A rated current.
- B curve tripping characteristic.
- 100 mA rated residual operating current.
- Type AC residual current protection.
- 6 kA Icn rated short-circuit breaking capacity.
- 415 V AC rated voltage.
- 50/60 Hz rated frequency.
- Test pushbutton for checking correct residual current protection operation.
- Earth fault indicator and contact position indication for easier status identification.
- 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 B8 AC100 therefore protects connected circuits against overload and short-circuit currents while also detecting sinusoidal alternating earth fault currents.
The DS203NC series is designed for modern three-phase systems where comprehensive circuit protection and efficient use of switchboard space are important. Its compact 3P+N construction, test facility and clear fault and contact-status indication help simplify installation, testing and maintenance.
Typical Applications
- Commercial three-phase electrical distribution systems.
- Industrial control panels and distribution boards.
- Low-current three-phase final circuits.
- Machinery and automation power distribution.
- Building services and electrical installations.
- Retrofit projects requiring earth fault protection without excessive additional switchboard space.
Technical Specifications
| Series | DS203NC |
|---|---|
| ABB order code | 2CSR256040R2085 |
| EAN | 8012542076629 |
| Product type | Residual current circuit breaker with overcurrent protection (RCBO) |
| Number of poles | 3P+N |
| Total poles | 4 |
| Protected poles | 3 |
| Rated current | 8 A |
| Tripping characteristic | B curve |
| Residual current type | AC |
| Rated residual current | 100 mA |
| Rated voltage | 415 V AC |
| Rated frequency | 50/60 Hz |
| Rated short-circuit breaking capacity (Icn) | 6 kA |
| Rated insulation voltage (Ui) | 500 V |
| Installation depth | 69 mm |
| Width | 4 modules |
| Mounting type | DIN rail |
| Weight | approx. 0.48 kg |
| Standards | IEC/EN 61009-1, IEC/EN 61009-2-1 |
Frequently Asked Questions
What is the ABB DS203NCB8AC100 used for?
The DS203NCB8AC100 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 DS203NCB8AC100?
The RCBO has a rated current of 8 A and uses a B tripping characteristic.
What residual current sensitivity does this RCBO provide?
The DS203NCB8AC100 has a rated residual operating current of 100 mA and provides Type AC residual current protection.
What is the breaking capacity of the ABB DS203NCB8AC100?
The device has a rated short-circuit breaking capacity (Icn) of 6 kA.
How many poles does the DS203NCB8AC100 have?
The DS203NCB8AC100 has a 3P+N configuration with four poles in total and three protected poles, making it suitable for three-phase circuits with neutral.
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.
