£392.09
The ABB DSE203NMB25A10 is a compact and dependable 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO) designed to safeguard three-phase electrical installations against overloads, short circuits and earth leakage faults. Part of the advanced ABB DSE203N M series, it combines overcurrent and residual current protection into a single three-module device, making it an excellent solution for commercial, industrial and OEM electrical systems.
Featuring an unswitched neutral, electronic residual current detection and a compact DIN rail mounted design, the DSE203NMB25A10 simplifies switchboard construction while providing reliable long-term protection for electrical installations. It is engineered for applications where dependable circuit protection and enhanced personnel safety are essential.
With a 25 A Type B tripping characteristic, 10 kA short-circuit breaking capacity and 10 mA Type A residual current sensitivity, this RCBO is well suited to protecting three-phase circuits supplying resistive and other low inrush current loads while delivering enhanced protection against electric shock.
The ABB DSE203NMB25A10 continuously monitors electrical circuits for overloads, short circuits and earth leakage currents. If a fault is detected, the RCBO disconnects the circuit quickly to help protect electrical equipment, minimise downtime and improve operator safety.
Its Type B tripping characteristic is ideal for circuits supplying resistive loads and equipment with relatively low starting currents. The integrated 10 mA Type A residual current protection detects both alternating current (AC) and pulsating DC leakage currents, providing enhanced protection where increased electrical safety is required.
| Current | 25 A |
|---|---|
| Phase | Three Phase |
| Function | 3P+N electronic residual current circuit breaker with overcurrent protection (eRCBO). |
| Residual Current Type | Type A. |
| Number of Poles | 3 poles plus neutral (neutral unswitched). |
| Overcurrent Protection Rating | B25 (25 A, instantaneous characteristic). |
| Connection Type | Bottom power supply connection. |
| Terminal Capacity | Busbar 10 mm²; rigid conductors 1–25 mm²; flexible conductors 1–16 mm². |
| Mechanical Endurance | 20,000 cycles. |
| Electrical Endurance | 10,000 cycles. |
| Position of Neutral Terminals | Left. |
It protects three-phase electrical circuits against overloads, short circuits and earth leakage faults using combined RCBO technology.
The ABB DSE203NMB25A10 has a rated current of 25 A.
Type B devices are intended for circuits with relatively low inrush currents, making them suitable for resistive loads and selected control equipment.
It provides 10 mA Type A residual current protection capable of detecting AC and pulsating DC earth leakage currents.
It is designed for DIN rail installation within commercial and industrial electrical distribution boards, switchboards and control panels.
ABB DSE203N M electronic RCBOs are trusted by electrical contractors, panel builders and industrial engineers for their compact design, dependable fault protection and long service life.
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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...