£340.95
The ABB DSE203NMC13A30 is a compact and reliable residual current circuit breaker with overcurrent protection (RCBO) designed for three-phase plus neutral electrical circuits. It combines overload, short-circuit and earth leakage protection within one DIN rail-mounted device, helping improve electrical safety while reducing the number of protective components required inside a distribution board.
As part of the ABB DSE203N RCBO series, this device is suitable for commercial, industrial and advanced residential installations. Its combined protection functions simplify electrical panel design, installation and fault diagnosis by providing both overcurrent and residual current protection for an individual circuit.
The DSE203NMC13A30 has a rated current of 13 A, a Type C tripping characteristic and a rated residual operating current of 30 mA. Its Type A residual current detection provides protection against sinusoidal AC and pulsating DC residual currents, making it suitable for circuits supplying electronic equipment, controls and loads with moderate starting currents.
An RCBO protects an electrical circuit against several common fault conditions. Its thermal and magnetic protection elements disconnect the supply during sustained overloads or short-circuit events, while the residual current mechanism monitors the balance of current flowing through the live conductors and neutral.
When earth leakage reaches the specified operating threshold, the ABB DSE203NMC13A30 disconnects the protected circuit. Combining these functions within one device provides dedicated residual current protection and can help prevent a fault on one circuit from unnecessarily disconnecting other circuits within the installation.
Type A residual current protection detects sinusoidal alternating residual currents and pulsating direct residual currents. This makes the DSE203NMC13A30 suitable for circuits containing electronic controls, switch-mode power supplies and other modern equipment that may generate pulsating DC leakage currents.
The Type C tripping characteristic allows the RCBO to tolerate moderate starting currents while maintaining effective short-circuit protection. It is commonly selected for circuits supplying small motors, pumps, fans, control transformers, lighting equipment and other commercial or industrial loads.
| Current | 13 A |
|---|---|
| Phase | Three Phase |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). |
| Residual Current Type | Type A, 30 mA for additional direct contact protection. |
| Poles | 3 poles plus neutral (neutral unswitched). |
| Operating Characteristic | Instantaneous tripping. |
| Connecting Capacity | Busbar 10 mm²; rigid conductors 1 to 25 mm²; flexible conductors 1 to 16 mm². |
| Electrical Endurance | 10,000 cycles. |
| Mechanical Endurance | 20,000 cycles. |
| Position of Neutral Terminals | Left side. |
The ABB DSE203NMC13A30 is used to protect three-phase plus neutral electrical circuits against overloads, short circuits and earth leakage currents.
The DSE203NMC13A30 has a rated current of 13 A and a Type C tripping characteristic.
The 30 mA value is the rated residual operating current. The RCBO disconnects the protected circuit when earth leakage reaches its operating threshold, providing additional protection against electric shock.
This RCBO uses Type A residual current protection, which detects sinusoidal AC and pulsating DC residual fault currents.
A Type C tripping characteristic is suitable for circuits with moderate inrush currents, including small motors, pumps, fans, transformers and commercial electrical equipment.
ABB circuit protection devices are widely specified by electrical contractors, panel builders and industrial engineers for dependable protection, straightforward installation and reliable performance in modern low-voltage distribution 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...