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ABB DSE203NMC20A300 3+N 10kA RCBO C20 300mA 2TAZ234414R4204
£215.65
Why Choose the ABB DSE203NMC20A300 Electronic RCBO?
The ABB DSE203NMC20A300 is a high performance 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to provide dependable protection against overloads, short circuits and earth leakage faults in commercial and industrial electrical installations. As part of the advanced ABB DSE203N M series, it combines multiple protection functions into a compact three-module device, making it ideal for distribution boards, switchgear and OEM control panels.
Designed for modern electrical systems, the DSE203NMC20A300 incorporates Type A residual current protection, enabling detection of both alternating and pulsating DC earth fault currents. Its electronic operating mechanism provides reliable protection while reducing installation space and simplifying panel layouts. The neutral pole remains unswitched for dependable operation across three-phase electrical systems.
With a 20 A C-curve rating, 300 mA residual current sensitivity and compatibility with a three-phase 400/415 V AC supply, the DSE203NMC20A300 is ideally suited to industrial machinery, commercial electrical installations and OEM equipment requiring reliable circuit protection.
Key Advantages
- Compact 3P+N electronic RCBO combining MCB and RCD protection.
- 20 A C-curve suitable for circuits with moderate inrush currents.
- 300 mA Type A residual current protection.
- Protects against overloads, short circuits and earth leakage faults.
- Space-saving three-module construction.
- Reliable ABB engineering for commercial and industrial installations.
Key Features
- ABB DSE203N M electronic RCBO series.
- 20 A rated current.
- C characteristic trip curve.
- 300 mA Type A residual current sensitivity.
- 3P+N configuration with unswitched neutral.
- 10 kA rated short-circuit capacity.
- DIN rail mounting for straightforward installation.
- Mechanical endurance of approximately 20,000 operating cycles.
Reliable Protection for Three-Phase Electrical Systems
Electronic RCBOs combine miniature circuit breaker and residual current protection into a single device, providing comprehensive protection against overloads, short circuits and earth leakage faults while reducing installation space and simplifying electrical installations.
The ABB DSE203N M series has been developed for commercial, industrial and OEM applications where dependable protection, easy installation and long service life are essential. Electronic residual current technology ensures consistent performance under demanding operating conditions.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- OEM machinery and automation systems.
- Motor control panels.
- Manufacturing facilities.
- Three-phase electrical distribution systems.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | RCBO | |
| Trip Curve | C curve | |
| Residual Current | 300 mA | |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). | |
| Protection Type | Type A residual current, earth fault, short-circuit, overload, and indirect/direct contact protection (30 mA versions). | |
| Current Rating | C20 A. | |
| Number of Poles | 3 protected poles plus neutral (neutral unswitched). | |
| Connection Type | Bottom power supply connection with busbar, rigid, and flexible cable terminals. | |
| Terminal Capacity | Busbar 10 mm²; Rigid 1–25 mm²; Flexible 1–16 mm². | |
| Operating Characteristic | Instantaneous earthing switch (undelayed). | |
| Durability | Electrical endurance 10,000 cycles; mechanical endurance 20,000 cycles. | |
| Neutral Terminal Position | Left side. |
Frequently Asked Questions
What is the ABB DSE203NMC20A300 used for?
It protects three-phase electrical circuits against overloads, short circuits and earth leakage faults in commercial and industrial installations.
What is the rated current of this RCBO?
The device has a 20 A rated current with a C characteristic trip curve.
What type of residual current protection does it provide?
The DSE203NMC20A300 provides Type A 300 mA residual current protection, detecting alternating and pulsating DC residual currents.
How many poles does the device have?
It features a 3P+N configuration with an unswitched neutral.
Where is this RCBO typically installed?
It is designed for DIN rail installation inside industrial control panels, switchboards and commercial distribution boards.
Trusted by Electrical Professionals Worldwide
ABB DSE203N M electronic RCBOs are trusted by electricians, panel builders and industrial engineers for delivering dependable circuit protection, robust construction and long-term reliability.
