£340.95
The ABB DSE203NMB13A30 is a compact and dependable 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 components required inside a distribution board.
As part of the ABB DSE203N RCBO series, this protective device is suitable for commercial, industrial and advanced residential electrical installations. By combining the functions of a miniature circuit breaker and a residual current device, it simplifies panel design, installation, circuit testing and fault identification.
The DSE203NMB13A30 has a rated current of 13 A, a Type B 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, lighting, controls and other loads with relatively low 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 continuously monitors the balance of current flowing through the live conductors and neutral.
When earth leakage reaches the specified operating threshold, the ABB DSE203NMB13A30 disconnects the protected circuit. Combining these protective 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 DSE203NMB13A30 suitable for circuits containing electronic controls, switch-mode power supplies and other modern equipment that may generate pulsating DC leakage currents.
The Type B tripping characteristic provides rapid magnetic operation at relatively low multiples of the rated current. It is commonly selected for resistive loads, lighting circuits, electronic equipment and control systems where high starting currents are not normally expected.
| Current | 13 A |
|---|---|
| Phase | Three Phase |
| Function | Residual current circuit breaker with overcurrent protection (eRCBO), Type A. |
| Poles | 3P+N, neutral unswitched, protective earth undelayed. |
| Rated Current | 13 A (B13 characteristic). |
| Residual Current Rating | 30 mA for additional direct contact protection. |
| Connection | Bottom power supply connection with busbar, rigid (1–25 mm²) and flexible (1–16 mm²) terminals. |
| Mechanical Endurance | 20,000 cycles. |
| Electrical Endurance | 10,000 cycles. |
| Mounting Modules | 3 modules wide. |
The ABB DSE203NMB13A30 is used to protect three-phase plus neutral electrical circuits against overloads, short circuits and earth leakage currents.
The DSE203NMB13A30 has a rated current of 13 A and a Type B 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 B tripping characteristic is designed for circuits with relatively low inrush currents, including resistive loads, lighting, electronic equipment and control circuits.
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...