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ABB DSE203NMB40A10 3+N 10kA RCBO B40 10mA 2TAZ234414R1405
£225.85
Why Choose the ABB DSE203NMB40A10 RCBO?
The ABB DSE203NMB40A10 is a compact 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to safeguard 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 into a single modular device, helping reduce enclosure space while simplifying installation and maintenance.
Designed for commercial, industrial and OEM applications, the DSE203NMB40A10 features an unswitched neutral, electronic residual current monitoring and a compact DIN rail mounted design. It provides dedicated protection for individual three-phase circuits, helping minimise disruption by disconnecting only the affected circuit during a fault.
With a 40 A rated current, Type B tripping characteristic, 10 mA Type A residual current sensitivity and a 10 kA short-circuit breaking capacity, this RCBO is ideal for protecting resistive loads and other circuits with relatively low inrush currents where enhanced protection against electric shock is required.
Key Advantages
- Combined overload, short-circuit and earth leakage protection in one compact device.
- 40 A rated current for higher-load three-phase electrical circuits.
- Type B tripping characteristic suitable for low inrush current applications.
- 10 mA Type A residual current protection provides enhanced personnel safety.
- 10 kA short-circuit breaking capacity for dependable fault interruption.
- Compact three-module DIN rail design saves valuable panel space.
- Suitable for commercial, industrial and machine-building installations.
Key Features
- ABB DSE203N M electronic RCBO.
- 3 poles plus neutral (neutral unswitched).
- 40 A rated current.
- Type B overcurrent characteristic.
- 10 mA Type A residual current protection.
- 10 kA rated short-circuit breaking capacity.
- Electronic residual current monitoring.
- DIN rail mounting.
Reliable Protection for Three-Phase Electrical Systems
The ABB DSE203NMB40A10 continuously monitors electrical circuits for overloads, short circuits and earth leakage currents. If a fault occurs, the RCBO disconnects the affected circuit rapidly, helping protect equipment, reduce downtime and improve electrical safety.
Its Type B tripping characteristic is designed for circuits supplying resistive loads and equipment with relatively low starting currents. The integrated 10 mA Type A residual current protection detects both alternating current (AC) and pulsating DC leakage currents, making it suitable for many modern electrical installations containing electronic equipment.
Typical Applications
- Commercial electrical distribution boards.
- Industrial switchboards and control panels.
- Machine-building and OEM equipment.
- Three-phase power distribution systems.
- Manufacturing and automation facilities.
- Resistive loads and low inrush current circuits.
- Critical installations requiring 10 mA residual current protection.
Technical Specifications
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| Poles | 3-pole + N | |
|---|---|---|
| Current | 40 A | |
| Phase | Three Phase | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Residual Current | 10 mA | |
| RCD Type | Type A | |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). | |
| Residual Current Type | Type A for protection against short-circuits, overload, earth faults, and indirect contacts. | |
| Neutral Configuration | Unswitched neutral with terminals positioned on the left. | |
| Operating Characteristic | Instantaneous trip. | |
| Terminal Capacity | Busbar 10 mm², rigid cables 1–25 mm², flexible cables 1–16 mm². | |
| Electrical Endurance | Rated for 10,000 cycles. | |
| Mechanical Endurance | Rated for 20,000 cycles. | |
| Weight | 0.549 kg. |
Frequently Asked Questions
What is the ABB DSE203NMB40A10 used for?
The ABB DSE203NMB40A10 provides combined overload, short-circuit and earth leakage protection for individual three-phase electrical circuits.
What is the rated current of this RCBO?
The DSE203NMB40A10 has a rated current of 40 A.
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 equipment.
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 DSE203NMB40A10 typically installed?
It is designed for DIN rail installation within commercial and industrial distribution boards, switchboards and electrical control panels.
Trusted Electrical Protection from ABB
ABB DSE203N M electronic RCBOs are trusted by electrical contractors, panel builders and industrial engineers for their compact design, dependable circuit protection and long operational life.
