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Chint NB1L-2P-C40 RCBO – 2P – C Curve – 40A – 30mA – 10kA
CHINT NB1L-2P-C40 RCBO with 40 A rated current, C curve, 30 mA residual current protection and compact 2 pole DIN rail mounting for residential, commercial and light industrial electrical installations.
Why Choose the CHINT NB1L-2P-C40 RCBO?
The CHINT NB1L-2P-C40 is a dependable 2-pole Residual Current Operated Circuit Breaker with Overcurrent Protection (RCBO) designed to provide overload, short-circuit and earth leakage protection within one compact DIN rail mounted device. As part of the CHINT NB1L RCBO series, it delivers reliable protection for residential, commercial and light industrial electrical installations.
Featuring a 40 A rated current, C tripping characteristic and 30 mA residual current protection, the NB1L-2P-C40 is suitable for circuits with moderate inrush currents, including lighting, socket outlets, small motors, HVAC equipment and general power distribution. Its combined RCBO design helps save valuable panel space compared with separate MCB and RCD devices.
With a 2-pole configuration, compact modular construction and dependable fault protection, the CHINT NB1L-2P-C40 is ideal for consumer units, distribution boards and electrical panels where circuit protection and personal safety are both required.
Key Advantages
- Combined RCBO protection against overload, short-circuit and earth leakage faults.
- 40 A rated current for higher current final circuits.
- C curve tripping characteristic for loads with moderate inrush currents.
- 30 mA residual current protection for additional personal safety.
- Compact 2-pole design for DIN rail mounted distribution boards.
- Helps reduce installation space compared with separate MCB and RCD components.
Key Features
- CHINT NB1L RCBO series.
- 40 A rated current.
- 2-pole configuration.
- C tripping characteristic.
- 30 mA residual operating current.
- Thermal and magnetic overcurrent protection.
- Earth leakage fault protection.
- DIN rail mounting for modular electrical panels.
Complete Circuit and Earth Leakage Protection
The CHINT NB1L-2P-C40 combines the functions of a miniature circuit breaker and residual current device in one unit. This provides protection against overcurrents and earth leakage faults while reducing the space required inside the distribution board.
Its C curve characteristic makes it suitable for circuits where moderate inrush currents are expected, including lighting systems, socket circuits, small motors and inductive electrical loads in commercial and light industrial installations.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Industrial electrical panels.
- Lighting circuits.
- Socket outlet circuits.
- Small motors, HVAC and inductive loads.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | RCBO | |
| Trip Curve | C curve | |
| Breaking Capacity | 10 kA | |
| Residual Current | 30 mA | |
| Manufacturer | CHINT | |
| Series | NB1L | |
| Model | NB1L-2P-C40 | |
| Product type | RCBO | |
| Rated current | 40 A | |
| Number of poles | 2 | |
| Tripping characteristic | C | |
| Rated voltage | 220 / 230 / 240 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated residual operating current | 30 mA | |
| Rated short-circuit capacity | 10 kA | |
| Rated impulse withstand voltage | 6 kV | |
| Insulation voltage | 500 V | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Dimensions (H × W × D) | approx. 86 × 54 × 78 mm |
Frequently Asked Questions
What is the CHINT NB1L-2P-C40 used for?
It protects electrical circuits against overloads, short circuits and earth leakage faults using a single compact RCBO device.
What does the C curve characteristic mean?
The C characteristic is designed for circuits with moderate inrush currents, making it suitable for lighting, socket outlets, small motors and inductive loads.
What residual current protection does this RCBO provide?
This model provides 30 mA residual current protection for additional personal safety against electric shock.
What is the rated current of this RCBO?
The CHINT NB1L-2P-C40 has a rated current of 40 A.
Where is this RCBO typically installed?
It is designed for DIN rail installation inside consumer units, distribution boards and electrical panels in residential, commercial and light industrial installations.
Trusted by Electrical Professionals Worldwide
CHINT NB1L RCBOs are trusted by electricians, contractors and panel builders for compact, reliable protection against overloads, short circuits and earth leakage faults in modern low-voltage installations.
