Why Choose the ABB DSE203NMC63A10 RCBO?
The ABB DSE203NMC63A10 is a compact 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to protect three-phase electrical circuits against overloads, short circuits and earth leakage faults. As part of the ABB DSE203N M series, it combines overcurrent and residual current protection within a single modular device, helping reduce enclosure space while simplifying installation.
Developed for commercial, industrial and OEM applications, the DSE203NMC63A10 provides dedicated protection for individual three-phase circuits. Its electronic residual current monitoring, unswitched neutral and DIN rail mounting make it suitable for modern distribution boards and control panels.
Featuring a 63 A rated current, Type C tripping characteristic, 10 mA Type A residual current sensitivity and 10 kA short-circuit breaking capacity, this ABB RCBO is ideal for higher-load circuits with moderate starting currents where enhanced earth leakage protection is required.
Key Advantages
- Combines overload, short-circuit and residual current protection in one compact device.
- 63 A rated current for higher-capacity three-phase circuits.
- Type C tripping characteristic accommodates moderate inrush currents.
- 10 mA Type A residual current protection provides enhanced protection against earth leakage.
- 10 kA breaking capacity supports dependable short-circuit interruption.
- Compact DIN rail format helps maximise enclosure space.
- Individual circuit protection can improve fault isolation and reduce disruption.
Key Features
- ABB DSE203N M electronic RCBO series.
- 3 poles plus neutral (3P+N).
- 63 A rated current.
- Type C overcurrent tripping curve.
- 10 mA Type A residual current protection.
- 10 kA short-circuit breaking capacity.
- Electronic residual current monitoring.
- DIN rail mounting.
Combined Protection for Three-Phase Circuits
The ABB DSE203NMC63A10 continuously monitors the protected circuit for overloads, short circuits and earth leakage currents. When a fault is detected, the RCBO disconnects the affected circuit quickly, helping protect equipment, reduce downtime and improve electrical safety.
Its integrated design allows overload and residual current protection to be provided by a single device, helping simplify panel layouts while enabling individual circuit isolation.
Type C Overcurrent Protection
The Type C tripping characteristic is intended for circuits that experience moderate inrush currents during normal operation, including suitably designed motor circuits, pumps, transformers, lighting installations and industrial machinery.
10 mA Type A Residual Current Protection
The DSE203NMC63A10 incorporates Type A residual current protection, detecting both sinusoidal AC and pulsating DC earth leakage currents. Its 10 mA sensitivity provides enhanced protection where specified by the installation design and applicable wiring regulations.
Typical Applications
- Commercial distribution boards.
- Industrial switchboards.
- Machine-building and OEM equipment.
- Three-phase power distribution.
- Manufacturing and automation systems.
- Motor and pump circuits with moderate starting currents.
- Commercial lighting installations.
- Critical circuits requiring 10 mA residual current protection.
Installation Considerations
The ABB DSE203NMC63A10 is designed for DIN rail installation inside compatible electrical enclosures. Installation should be carried out by a competent electrical professional in accordance with ABB instructions and the applicable wiring regulations.
