£340.95
The ABB DSE203NMB32A30 is a compact three-phase plus neutral electronic residual current circuit breaker with overcurrent protection (eRCBO). It combines overload, short-circuit and earth leakage protection in a single device, helping simplify switchboard design while providing dedicated protection for the connected electrical circuit.
Part of the ABB DSE203N M electronic RCBO range, this model is designed for commercial, industrial and building-services installations. Its integrated protection functions can reduce wiring complexity, conserve distribution board space and make circuit fault identification more straightforward.
The DSE203NMB32A30 features a rated current of 32 A, a Type B tripping characteristic and 30 mA Type A residual current protection. It is suitable for three-phase circuits supplying resistive loads, lighting, heating equipment, electronic systems and other applications with relatively low or predictable starting currents.
The ABB DSE203NMB32A30 protects against several common electrical fault conditions. Its thermal mechanism responds to sustained overloads, while magnetic protection provides rapid disconnection during short-circuit events. The electronic residual current system monitors the balance of current flowing through the live conductors and neutral.
When earth leakage reaches the specified operating threshold, the RCBO disconnects the protected circuit. Integrating these functions within one device provides individual circuit protection and can prevent a fault on one circuit from unnecessarily interrupting unrelated electrical loads.
Type A residual current protection detects sinusoidal alternating residual currents and pulsating direct residual currents. This makes the DSE203NMB32A30 suitable for installations containing electronic controls, power supplies and other equipment that may generate pulsating DC leakage currents.
The Type B tripping characteristic is intended for circuits where high starting currents are not normally expected. Typical applications include resistive heating, lighting, electronic equipment, control systems and general-purpose distribution circuits, subject to the electrical installation design.
| Current | 32 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 + neutral (unswitched neutral). |
| Overcurrent Characteristic | Instantaneous tripping. |
| Connecting Capacity | Busbar 10 mm²; rigid cables 1–25 mm²; flexible cables 1–16 mm². |
| Position of Neutral Terminals | Left side. |
| Electrical Endurance | 10,000 cycles. |
| Mechanical Endurance | 20,000 cycles. |
| Weight | 0.549 kg. |
The ABB DSE203NMB32A30 is a 3P+N electronic RCBO that combines overload, short-circuit and Type A residual current protection in one device.
The DSE203NMB32A30 has a rated current of 32 A.
This model uses a Type B tripping characteristic, making it suitable for circuits with relatively low or predictable starting currents.
It provides 30 mA Type A residual current protection for sinusoidal AC and pulsating DC earth leakage currents.
The ABB DSE203NMB32A30 has a rated short-circuit breaking capacity of 10 kA.
ABB DSE203N electronic RCBOs are widely selected by electrical contractors, panel builders and industrial engineers for reliable circuit protection, compact installation and dependable performance in modern low-voltage electrical systems.
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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...