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.
ABB DSE203NMC25A30 3+N 10kA RCBO C25 30mA 2TAZ234414R2254
£187.52
Why Choose the ABB DSE203NMC25A30 Electronic RCBO?
The ABB DSE203NMC25A30 is a high-performance three-phase plus neutral electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to protect electrical circuits against overloads, short circuits and earth leakage faults. Combining multiple protection functions within a single compact device helps simplify installation while reducing space requirements inside modern distribution boards.
Part of the ABB DSE203N electronic RCBO series, this device is engineered for commercial, industrial and infrastructure installations where dependable circuit protection and reliable earth leakage detection are essential. The electronic residual current system delivers accurate protection while the robust construction ensures long service life in demanding environments.
With a rated current of 25 A, a Type C tripping characteristic and 30 mA Type A residual current protection, the DSE203NMC25A30 is ideal for circuits supplying motors, HVAC equipment, pumps, lighting and automation systems where moderate inrush currents are expected. The device features an unswitched neutral, functional earth lead and a 10 kA breaking capacity for demanding low-voltage installations.
Key Advantages
- Combined overload, short-circuit and earth leakage protection.
- 25 A rated current for commercial and industrial electrical circuits.
- 30 mA Type A residual current protection for enhanced electrical safety.
- Type C tripping characteristic suitable for moderate inrush current applications.
- 10 kA breaking capacity for demanding installations.
- Three-phase plus neutral configuration with unswitched neutral.
- Functional earth lead provides additional protection during neutral loss.
- Compact design simplifies installation in modern distribution boards.
Key Features
- ABB DSE203N electronic RCBO series.
- 25 A rated current.
- Type C overcurrent protection.
- 30 mA Type A residual current protection.
- 10 kA short-circuit breaking capacity.
- Three protected phases with unswitched neutral.
- Protection against overloads, short circuits and earth leakage.
- Earth fault trip indication window.
- Real contact position indicator.
- Flying leads for chassis distribution board installation.
- Pillar terminals for secure electrical connections.
Advanced Electronic Circuit Protection
The ABB DSE203NMC25A30 continuously monitors overload, short-circuit and earth leakage conditions, disconnecting the protected circuit whenever abnormal operating conditions occur. Combining these protective functions within one compact device improves installation efficiency while providing dedicated protection for individual three-phase circuits.
Its electronic residual current technology detects both sinusoidal AC and pulsating DC earth fault currents, while the 30 mA sensitivity provides additional protection against electric shock in accordance with modern installation practices.
Typical Applications
- Commercial distribution boards.
- Industrial electrical installations.
- Motor control circuits.
- HVAC and ventilation systems.
- Pumps and process equipment.
- Building automation systems.
- Machine control panels.
- Infrastructure and utilities.
Technical Specifications
Tick the specs you need, then view products that match.
| Poles | 3-pole + N | |
|---|---|---|
| Current | 25 A | |
| Phase | Three Phase | |
| Device Type | RCBO | |
| Trip Curve | C curve | |
| Residual Current | 30 mA | |
| RCD Type | Type A | |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). | |
| Residual Current Type | Type A. | |
| Number of Poles | 3 poles plus neutral (neutral unswitched). | |
| Operating Characteristic | Instantaneous. | |
| Contact Configuration | 3 modules, neutral terminal on left. | |
| Connecting Capacity | Busbar 10 mm², rigid 1–25 mm², flexible 1–16 mm². | |
| Electrical Endurance | 10,000 cycles. | |
| Mechanical Endurance | 20,000 cycles. | |
| Weight | 0.549 kg. |
Frequently Asked Questions
What is the ABB DSE203NMC25A30 used for?
The ABB DSE203NMC25A30 protects three-phase electrical circuits against overloads, short circuits and earth leakage faults using a single electronic RCBO.
What is the rated current of this RCBO?
This model has a rated current of 25 A with a Type C tripping characteristic.
What type of residual current protection does it provide?
The device provides 30 mA Type A residual current protection, detecting both AC and pulsating DC earth leakage currents.
What is the breaking capacity?
The DSE203NMC25A30 has a 10 kA short-circuit breaking capacity for commercial and industrial electrical installations.
Does this RCBO have an unswitched neutral?
Yes. The device features an unswitched neutral together with a functional earth lead for additional protection in the event of neutral loss.
Trusted ABB Electrical Protection
ABB DSE203N electronic RCBOs are widely specified by electrical contractors, panel builders and industrial engineers to deliver dependable circuit protection, reliable earth leakage detection and efficient installation in modern low-voltage electrical systems.
