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NB3LEU-A-C45 Chint RCBO 45A C Curve 30mA 1 Pole + Neutral
Chint NB3LEU-C45 1P+N RCBO with 45A rated current, C Curve characteristic, 30mA residual current sensitivity and 10kA short circuit breaking capacity for single-phase electrical installations.
£28.24
Why Choose the Chint NB3LEU-C45 RCBO?
The Chint NB3LEU-C45 is a compact and reliable 1P+N RCBO (Residual Current Circuit Breaker with Overcurrent Protection) designed to protect single-phase electrical circuits against earth leakage, overload and short circuit faults. By combining residual current protection and overcurrent protection in one DIN rail mounted device, it helps improve electrical safety while saving space inside consumer units, distribution boards and control panels.
As part of the Chint NB3LEU Series, this RCBO features a 45A rated current, C Curve tripping characteristic and 30mA residual current sensitivity. It is suitable for circuits with moderate inrush currents, including lighting, small motors, commercial distribution and general electrical loads.
With a 230/240V AC rated voltage, 10kA short circuit breaking capacity and electronic residual current operation, the NB3LEU-C45 provides dependable protection for residential, commercial and light industrial electrical installations.
Key Advantages
- Combined RCBO protection against earth leakage, overload and short circuit faults.
- 45A rated current for higher-rated single-phase circuits.
- C Curve trip characteristic for mixed resistive and inductive loads.
- 30mA residual current sensitivity provides additional protection against electric shock.
- 10kA breaking capacity for robust circuit protection.
- Compact 1P+N DIN rail mounted design for efficient board layouts.
Key Features
- Chint NB3LEU Series RCBO.
- 45A rated current.
- 1P+N pole configuration.
- C Curve magnetic trip characteristic.
- 30mA rated residual operating current.
- 10kA short circuit breaking capacity.
- Electronic residual current operation.
- 35mm DIN rail mounting for quick installation.
Reliable Protection for Single Phase Circuits
The Chint NB3LEU-C45 helps protect people, wiring and connected equipment by automatically disconnecting the circuit when earth leakage, overload or short circuit conditions are detected. This makes it a practical choice for electrical contractors, panel builders and installers working with compact single-phase distribution systems.
Its C Curve trip characteristic is suitable for circuits with moderate inrush currents, while the 30mA residual current protection helps provide additional safety in installations where personal protection is required.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Higher-rated single-phase sub-circuits.
- Lighting and building services circuits.
- Control panels and small electrical enclosures.
- Circuits requiring combined RCBO protection.
Technical Specifications
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| Poles | 1-pole + N | |
|---|---|---|
| Current | 45 A | |
| Phase | Single Phase | |
| Trip Curve | C curve | |
| Breaking Capacity | 10 kA | |
| Residual Current | 30 mA | |
| Device Type | RCD | |
| Manufacturer | Chint | |
| Series | NB3LEU | |
| Model | NB3LEU-C45 | |
| Product type | Residual Current Circuit Breaker with Overcurrent Protection | |
| Configuration | 1P+N | |
| Rated current | 45A | |
| Trip Curve | C Curve | |
| Rated residual operating current | 30mA | |
| Rated voltage | 230/240V AC | |
| Frequency | 50/60Hz | |
| Rated short circuit breaking capacity | 10kA | |
| Operation type | Electronic | |
| Protection rating | IP20 | |
| Mounting type | 35mm DIN rail | |
| Standard | IEC/EN 61009-1 |
Frequently Asked Questions
What is the Chint NB3LEU-C45 used for?
The Chint NB3LEU-C45 is used to protect single-phase circuits against earth leakage, overload and short circuit faults.
What current rating does this RCBO have?
This model has a 45A rated current, making it suitable for higher-rated single-phase protection applications.
What does C Curve mean on this RCBO?
C Curve devices are designed for mixed resistive and inductive loads and typically trip between 5 and 10 times their rated current during magnetic fault conditions.
What residual current sensitivity does it provide?
The NB3LEU-C45 has a 30mA rated residual operating current, providing additional protection against electric shock.
How is the NB3LEU-C45 installed?
The RCBO is designed for installation onto a standard 35mm DIN rail inside consumer units, distribution boards and electrical control panels.
Trusted by Electrical Professionals Worldwide
Chint NB3LEU RCBOs are trusted by electricians, panel builders and electrical contractors for dependable low-voltage circuit protection where safety, reliability and compact installation are essential.
