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ABB DSE203NMB20A10 3+N 10kA RCBO B20 10mA 2TAZ234414R1205
£215.65
Why Choose the ABB DSE203NMB20A10 RCBO?
The ABB DSE203NMB20A10 is a compact and highly reliable 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to protect three-phase electrical installations against overloads, short circuits and earth leakage faults. Part of the advanced ABB DSE203N M series, it combines multiple protection functions into a single three-module device, making it ideal for commercial, industrial and OEM electrical applications.
Designed to simplify panel construction while improving electrical safety, the DSE203NMB20A10 features electronic residual current monitoring, an unswitched neutral and a compact DIN rail mounted design. Its robust construction and dependable operating characteristics make it suitable for demanding electrical distribution systems where reliable circuit protection is essential.
With a 20 A Type B tripping characteristic, 10 kA breaking capacity and 10 mA Type A residual current sensitivity, the ABB DSE203NMB20A10 is ideal for protecting three-phase circuits supplying resistive and low inrush current loads while providing enhanced protection against electric shock.
Key Advantages
- Compact 3P+N electronic RCBO combining overload and residual current protection.
- 20 A Type B tripping characteristic for low inrush current applications.
- 10 mA Type A residual current protection provides enhanced personnel safety.
- 10 kA short-circuit breaking capacity for dependable circuit protection.
- Space-saving three-module DIN rail mounted design.
- Suitable for commercial, industrial and OEM electrical installations.
Key Features
- ABB DSE203N M electronic RCBO series.
- 3 poles + neutral (unswitched neutral).
- 20 A rated current.
- Type B tripping characteristic.
- 10 mA Type A residual current protection.
- 10 kA rated breaking capacity.
- Electronic residual current monitoring.
- DIN rail mounting for distribution boards and control panels.
Reliable Protection for Three-Phase Electrical Systems
The ABB DSE203NMB20A10 continuously monitors electrical circuits for overloads, short circuits and earth leakage currents. If a fault is detected, the RCBO disconnects the circuit rapidly, helping protect electrical equipment, reduce downtime and improve safety for personnel.
Its Type B tripping characteristic is suitable for circuits supplying resistive loads and other equipment with relatively low inrush currents. The integrated 10 mA Type A residual current protection detects both AC and pulsating DC leakage currents, providing enhanced protection where increased electrical safety is required.
Typical Applications
- Commercial electrical distribution boards.
- Industrial control panels.
- Machine building and OEM equipment.
- Three-phase power distribution.
- Manufacturing and automation systems.
- Critical circuits requiring enhanced residual current protection.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Residual Current | 10 mA | |
| RCD Type | Type A | |
| Function | 3P+N eRCBO with overcurrent, short-circuit, earth fault and indirect contact protection. | |
| Residual Current Type | Type A. | |
| Number of Poles | 3 poles + neutral (neutral unswitched). | |
| Operating Characteristic | Instantaneous. | |
| Rated Current | 20 A (B20 variant). | |
| Connection Type | Bottom power supply connection. | |
| Terminal Capacity | Busbar 10 mm², rigid cables 1–25 mm², flexible cables 1–16 mm². | |
| Mechanical Endurance | 20,000 cycles. | |
| Electrical Endurance | 10,000 cycles. | |
| Position of Neutral Terminals | Left side. |
Frequently Asked Questions
What is the ABB DSE203NMB20A10 used for?
It provides combined protection against overloads, short circuits and earth leakage faults on three-phase electrical circuits.
What is the rated current of this RCBO?
The ABB DSE203NMB20A10 has a 20 A rated current.
What does the Type B tripping characteristic mean?
Type B devices are intended for circuits with relatively low inrush currents, making them suitable for resistive loads and selected control circuits.
What residual current protection does this model provide?
This RCBO provides 10 mA Type A residual current protection capable of detecting AC and pulsating DC earth leakage currents.
Where is the ABB DSE203NMB20A10 typically installed?
It is designed for DIN rail installation within commercial and industrial distribution boards, switchboards and machine control panels.
Trusted by Electrical Professionals Worldwide
ABB DSE203N M electronic RCBOs are trusted by electrical contractors, panel builders and industrial engineers for dependable circuit protection, compact installation and reliable long-term performance in demanding electrical installations.
