£429.17
The ABB DSE203NMC50A100 is a premium 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO), engineered to provide dependable 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 combines multiple protection functions into a single unit, making it an ideal solution for commercial, industrial and OEM applications.
Designed to maximise electrical safety whilst simplifying installation, the DSE203NMC50A100 continuously monitors residual current while protecting circuits from overload and short-circuit conditions. Integrating residual current and overcurrent protection into one compact device reduces switchboard space requirements, simplifies wiring and improves overall system reliability.
Featuring a 50 A Type C trip characteristic, 100 mA Type A residual current sensitivity and a 10 kA breaking capacity, the ABB DSE203NMC50A100 is ideally suited for protecting three-phase distribution systems, industrial machinery, HVAC equipment, automation systems and commercial electrical installations. Its compact three-module DIN rail mounted design enables fast installation within modern control panels and distribution boards.
The ABB DSE203NMC50A100 combines miniature circuit breaker functionality with advanced electronic residual current protection in one compact device. This allows installers to achieve comprehensive protection against overloads, short circuits and earth leakage faults whilst reducing the number of separate protective devices required.
Its Type C tripping characteristic makes it particularly suitable for circuits supplying motors, pumps, compressors, transformers, HVAC equipment and other loads with moderate inrush currents. Combined with Type A residual current detection, it delivers reliable protection for modern three-phase installations.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| 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. |
| Connection | Bottom power supply connection. |
| Connecting Capacity | Busbar 10 mm², rigid 1–25 mm², flexible 1–16 mm² conductors. |
| Electrical Endurance | 10,000 cycles. |
| Mechanical Endurance | 20,000 cycles. |
| Position of Neutral Terminals | Left side. |
| Earth Fault Protection | Undelayed earthing switch for earth fault current protection. |
It provides combined overcurrent and residual current protection for three-phase electrical circuits in commercial, industrial and OEM installations.
Type C devices are intended for circuits with moderate inrush currents, making them suitable for motors, transformers, compressors and similar equipment.
The 100 mA Type A residual current protection detects AC and pulsating DC earth leakage currents to improve electrical safety and equipment protection.
The device protects three phases with an unswitched neutral using a 3P+N configuration.
It is designed for DIN rail installation within commercial distribution boards, industrial control panels and OEM electrical equipment.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...