ABB DSE203NMB32A30 3+N 10kA RCBO B32 30mA 2TAZ234414R2325

Why Choose the ABB DSE203NMB32A30 Electronic RCBO?

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.

Key Advantages

• Combined overload, short-circuit and earth leakage protection.
• 32 A rated current for three-phase electrical circuits.
• 30 mA residual current sensitivity for additional protection against electric shock.
• Type A residual current detection for AC and pulsating DC fault currents.
• Type B tripping characteristic for loads with relatively low inrush current.
• 10 kA short-circuit breaking capacity.
• Three-phase plus neutral configuration.
• Compact electronic RCBO design helps conserve switchboard space.

Key Features

• ABB DSE203N M electronic RCBO series.
• 32 A rated current.
• B-curve overcurrent tripping characteristic.
• 30 mA rated residual operating current.
• Type A residual current protection.
• 10 kA rated breaking capacity.
• Three protected phases plus neutral connection.
• Thermal overload protection.
• Magnetic short-circuit protection.
• Electronic earth leakage detection.
• Residual current test function.
• Earth fault trip and contact position indication.

Combined Three-Phase Circuit Protection

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 and B-Curve Protection

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.

Typical Applications

• Commercial distribution boards.
• Industrial switchboards and control panels.
• Three-phase lighting circuits.
• Resistive heating equipment.
• Building-services installations.
• Electronic control and automation systems.
• Workshops and light industrial facilities.
• General three-phase final circuits.