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ABB DSE203NMB20A100 3+N 10kA RCBO B20 100mA 2TAZ234414R3205
£215.65
Why Choose the ABB DSE203NMB20A100 RCBO?
The ABB DSE203NMB20A100 is a premium 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO), engineered to provide reliable protection against overloads, short circuits and earth leakage faults in three-phase electrical installations. As part of the trusted ABB DSE203N M series, this compact protective device integrates multiple safety functions into a single unit, making it an excellent solution for commercial, industrial and OEM electrical systems.
Designed to improve electrical safety and installation efficiency, the DSE203NMB20A100 continuously monitors residual current whilst protecting circuits against overload and short-circuit conditions. By combining residual current and overcurrent protection into one compact device, it helps reduce panel space, simplify installation and improve the overall reliability of electrical distribution systems.
With a 20 A Type B trip characteristic, 100 mA Type A residual current sensitivity and a 10 kA breaking capacity, the ABB DSE203NMB20A100 is ideally suited for protecting three-phase distribution circuits, machinery, automation equipment and industrial control systems. Its compact three-module DIN rail mounted construction enables quick installation within modern switchboards and control panels.
Key Advantages
- Compact 3P+N electronic RCBO combining overload, short-circuit and residual current protection.
- 20 A Type B trip characteristic for rapid protection of sensitive circuits.
- 100 mA Type A residual current protection.
- 10 kA breaking capacity suitable for demanding commercial and industrial installations.
- Protects personnel and electrical equipment against multiple fault conditions.
- DIN rail mounted design simplifies installation and saves valuable panel space.
Key Features
- ABB DSE203N M electronic RCBO series.
- Rated current: 20 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 Circuit Protection for Three-Phase Installations
The ABB DSE203NMB20A100 combines miniature circuit breaker functionality with electronic residual current protection within 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, automation systems and distribution circuits requiring dependable fault protection.
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 | 20 A | |
| Phase | Three Phase | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Residual Current | 100 mA | |
| RCD Type | Type A | |
| Type | 3P+N eRCBO with residual current and overcurrent protection. | |
| Residual Current Type | Type A, with earth fault and additional direct contact protection (30 mA version). | |
| Number of Poles | 3 poles plus neutral (neutral unswitched). | |
| Connection | Bottom power supply connection, neutral terminals positioned left. | |
| Rated Cross-Section | Solid core 1–25 mm², multi-wired 1–16 mm². | |
| Connecting Capacity | Busbar 10 mm², rigid 1–25 mm², flexible 1–16 mm². | |
| Operating Characteristic | Instantaneous trip. | |
| Mechanical Endurance | 20,000 cycles; Electrical Endurance: 10,000 cycles. | |
| Weight | 0.549 kg. |
Frequently Asked Questions
What is the ABB DSE203NMB20A100 used for?
It provides combined overcurrent and residual current protection for three-phase electrical circuits in industrial, commercial 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 protecting circuits with low inrush currents.
What does the 100 mA residual current rating provide?
The 100 mA Type A residual current protection detects earth leakage faults and helps improve electrical safety whilst protecting equipment and electrical 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 DSE203NMB20A100 typically installed?
It is designed for DIN rail installation within commercial distribution boards, industrial control panels and OEM electrical equipment.
Trusted by Electrical Professionals Worldwide
ABB DSE203N M RCBOs are trusted by electrical contractors, panel builders and industrial engineers for delivering reliable circuit protection, compact installation and compliance with recognised international electrical standards.
