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ABB DSE203NMB50A100 3+N 10kA RCBO B50 100mA 2TAZ234414R3505
£236.04
Why Choose the ABB DSE203NMB50A100 RCBO?
The ABB DSE203NMB50A100 is a premium 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO), designed to provide reliable protection against overloads, short circuits and earth leakage faults in three-phase electrical installations. Part of the trusted ABB DSE203N M series, this compact device combines overcurrent and residual current protection into a single unit, making it ideal for commercial, industrial and OEM applications.
Engineered to maximise electrical safety whilst reducing installation time and switchboard space, the DSE203NMB50A100 continuously monitors residual current while protecting circuits against overload and short-circuit conditions. Its integrated design reduces wiring complexity and improves overall system reliability.
Featuring a 50 A Type B trip characteristic, 100 mA Type A residual current sensitivity and a 10 kA breaking capacity, the ABB DSE203NMB50A100 is ideally suited for protecting sensitive three-phase distribution systems, industrial machinery, commercial installations and automation equipment.
Key Advantages
- Compact 3P+N electronic RCBO combining overload, short-circuit and residual current protection.
- 50 A Type B trip characteristic for circuits requiring fast magnetic tripping.
- 100 mA Type A residual current protection.
- 10 kA breaking capacity suitable for demanding commercial and industrial applications.
- Protects personnel and valuable electrical equipment from multiple fault conditions.
- DIN rail mounted design saves valuable distribution board space.
Key Features
- ABB DSE203N M electronic RCBO series.
- Rated current: 50 A.
- Trip characteristic: Type B.
- Residual current sensitivity: 100 mA.
- Residual current type: Type A.
- Configuration: 3P+N with unswitched neutral.
- Rated short-circuit breaking capacity: 10 kA.
- Compact three-module DIN rail mounted construction.
Reliable Protection for Three-Phase Electrical Installations
The ABB DSE203NMB50A100 combines miniature circuit breaker functionality with advanced electronic residual current protection in a single compact device. This simplifies installation whilst providing dependable protection against overloads, short circuits and earth leakage faults across commercial and industrial electrical systems.
Its Type B tripping characteristic provides rapid magnetic operation for circuits with relatively low inrush currents, making it suitable for protecting sensitive electrical equipment, distribution circuits, automation systems and industrial control installations. Combined with Type A residual current detection, it delivers dependable protection for modern three-phase electrical systems.
Typical Applications
- Commercial distribution boards.
- Industrial electrical installations.
- OEM machinery.
- Automation and process control systems.
- Manufacturing facilities.
- Three-phase power distribution.
Technical Specifications
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| Poles | 3-pole + N | |
|---|---|---|
| Current | 50 A | |
| Phase | Three Phase | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Residual Current | 100 mA | |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). | |
| Type of Residual Current | Type A. | |
| Number of Poles | 3 poles plus neutral (neutral unswitched). | |
| Operating Characteristic | Instantaneous. | |
| Connecting Capacity | Busbar 10 mm², rigid 1–25 mm², flexible 1–16 mm². | |
| Electrical Endurance | 10,000 cycles. | |
| Mechanical Endurance | 20,000 cycles. | |
| Position of Neutral Terminals | Left. | |
| Earthing Switch Type | Undelayed. |
Frequently Asked Questions
What is the ABB DSE203NMB50A100 used for?
It provides combined overload, short-circuit and earth leakage protection for three-phase electrical circuits used in commercial, industrial and OEM installations.
What does the Type B trip characteristic mean?
Type B devices provide rapid magnetic tripping at relatively low fault current levels, making them suitable for circuits with low inrush currents and sensitive electrical equipment.
What does the 100 mA residual current rating provide?
The 100 mA Type A residual current protection detects AC and pulsating DC earth leakage currents, helping improve electrical safety whilst protecting equipment and installations.
How many poles does this RCBO protect?
The device protects three phases with an unswitched neutral using a 3P+N configuration.
Where is the DSE203NMB50A100 typically installed?
It is designed for DIN rail installation within commercial distribution boards, industrial control panels, OEM machinery and three-phase electrical installations.
Trusted by Electrical Professionals Worldwide
ABB DSE203N M RCBOs are trusted by electrical contractors, panel builders and industrial engineers for delivering dependable circuit protection, compact installation and compliance with recognised international electrical standards.
