Why Choose the Chint NB3LEU-C25 RCBO?
The Chint NB3LEU-C25 is a compact and reliable residual current operated circuit breaker with over-current protection (RCBO) designed for residential, commercial and light industrial electrical installations. As part of the Chint NB3LEU series, it combines earth leakage protection, overload protection and short-circuit protection in one modular device.
This RCBO features a 1P+N configuration, making it suitable for single-phase circuits requiring both live and neutral switching. Its C curve tripping characteristic is suitable for circuits with moderate inrush currents, while the 30 mA residual current sensitivity provides additional protection against electric shock.
With a rated current of 25 A, a rated voltage of 240 V AC and a short-circuit breaking capacity of 10 kA, the NB3LEU-C25 is well suited to radial circuits, small motors, socket outlet circuits and general-purpose final circuit protection. Its DIN rail mounting design supports quick and secure installation in consumer units and distribution boards.
Key Advantages
- Compact RCBO combining RCD and MCB protection.
- 25 A rated current for general-purpose final circuits.
- 30 mA residual current sensitivity for additional personal protection.
- C curve characteristic suitable for circuits with moderate inrush current.
- 10 kA short-circuit breaking capacity for dependable fault protection.
- DIN rail mounting for fast installation in consumer units and distribution boards.
Key Features
- Chint NB3LEU series electronic RCBO.
- 25 A rated current.
- 30 mA residual operating current.
- 1P+N configuration.
- C curve over-current protection.
- 10 kA rated short-circuit capacity.
- Provides overload, short-circuit and earth leakage protection.
- DIN rail mounting for modular electrical assemblies.
Combined Circuit and Earth Leakage Protection
RCBOs such as the Chint NB3LEU-C25 combine the functions of an MCB and an RCD in a single device. This allows the circuit to be disconnected in the event of overload, short circuit or earth leakage, helping improve electrical safety and circuit reliability.
The NB3LEU-C25 is suitable for applications where individual circuit protection is required. By protecting each final circuit independently, RCBOs can help minimise disruption compared with shared RCD arrangements, as a fault on one circuit is less likely to disconnect unrelated circuits.
Typical Applications
- Consumer units and distribution boards.
- Socket outlet circuits.
- Residential electrical installations.
- Commercial building circuits.
- Small motors and inductive loads.
- Electrical panels requiring combined over-current and residual current protection.
