£392.09
The ABB DSE203NMC32A10 is a compact 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to protect three-phase electrical circuits against overloads, short circuits and earth leakage faults. As part of the ABB DSE203N M series, it combines residual current and overcurrent protection in a single DIN rail device, helping reduce the number of separate protective components required within a distribution board.
Designed for commercial, industrial and machine-building applications, the DSE203NMC32A10 provides dedicated protection for an individual three-phase circuit. Electronic residual current monitoring supports dependable leakage-current detection, while its compact modular construction helps panel builders and electrical contractors use enclosure space efficiently.
With a 32 A rated current, Type C tripping characteristic, 10 mA Type A residual current sensitivity and 10 kA short-circuit breaking capacity, this ABB RCBO is suitable for circuits supplying equipment with moderate starting currents where enhanced earth leakage protection is required.
The ABB DSE203NMC32A10 monitors the connected circuit for excessive current and leakage to earth. During an overload, short circuit or residual current fault, the device disconnects the affected circuit, helping reduce the risk of conductor damage, equipment failure, electrical fire and electric shock.
Combining these protective functions within one RCBO also allows an individual circuit to be disconnected without relying on a shared residual current device. This can improve circuit discrimination and reduce the number of unrelated loads affected by a residual current fault.
The Type C tripping characteristic is intended for circuits that may experience moderate inrush currents during normal start-up. Typical examples include selected motors, pumps, commercial lighting equipment, transformers, control systems and industrial machinery.
The suitability of the Type C curve must be confirmed against the connected load, prospective fault current, cable characteristics and required disconnection time. Final circuit design and protective-device selection should always be completed by a suitably qualified electrical professional.
As a Type A RCBO, the DSE203NMC32A10 is designed to respond to sinusoidal alternating residual currents and pulsating direct residual currents. This makes it suitable for many modern electrical loads containing electronic components, rectifiers or power supplies.
Its 10 mA sensitivity provides a lower residual current operating threshold than commonly used 30 mA devices. This enhanced sensitivity can be beneficial for specifically assessed circuits, although normal operational leakage from connected equipment must be considered to minimise unwanted tripping.
The ABB DSE203NMC32A10 is intended for DIN rail installation within a compatible distribution board or electrical enclosure. Before installation, the system designer should verify the supply voltage, earthing arrangement, prospective short-circuit current, conductor size, load characteristics and required residual current sensitivity.
Installation, testing and periodic inspection must be performed by a competent electrical professional in accordance with the applicable wiring regulations and the manufacturer’s instructions. The integrated test function should be operated at the intervals specified for the installation.
| Current | 32 A |
|---|---|
| Phase | Three Phase |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). |
| Rated Poles | 3 protected poles plus neutral (unswitched). |
| Residual Current Type | Type A. |
| Operating Characteristic | Instantaneous. |
| Connecting Capacity | Busbar 10 mm²; rigid conductors 1–25 mm²; flexible conductors 1–16 mm². |
| Position of Neutral Terminals | Left. |
| Electrical Endurance | 10,000 cycles. |
| Mechanical Endurance | 20,000 cycles. |
| Power Supply Connection | Bottom. |
The ABB DSE203NMC32A10 provides combined overload, short-circuit and earth leakage protection for compatible three-phase circuits incorporating a neutral conductor.
The ABB DSE203NMC32A10 has a rated current of 32 A.
A Type C characteristic is suitable for circuits with moderate inrush currents, including appropriately assessed motors, pumps, lighting equipment, transformers and industrial control loads.
It provides 10 mA Type A residual current protection. Type A devices detect sinusoidal AC residual currents and pulsating DC residual currents.
The device has a rated short-circuit breaking capacity of 10 kA, subject to the applicable installation conditions and product standard.
Its Type A residual current classification makes it suitable for many circuits containing electronic equipment capable of producing pulsating DC leakage currents. The complete load profile must still be assessed before installation.
It is designed for DIN rail mounting inside compatible commercial or industrial distribution boards, switchboards and electrical control panels.
Not automatically. A 10 mA device offers a more sensitive operating threshold, but circuit leakage, discrimination requirements and applicable wiring regulations must be considered by the system designer.
The ABB DSE203NMC32A10 combines 32 A Type C overcurrent protection with sensitive 10 mA Type A residual current detection, providing a compact protective solution for appropriately designed three-phase electrical circuits.
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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...