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Chint NB310L-2P-B20 RCBO – 2P – B Curve – Type A – 20A – 30mA – 6kA
Chint NB310L-2P-B20 RCBO, a 20 A B curve 2 pole Type A residual current operated circuit breaker with overcurrent protection for single-phase electrical installations.
£30.96
Why Choose the Chint NB310L-2P-B20 RCBO?
The Chint NB310L-2P-B20 is a reliable Residual Current Circuit Breaker with Overcurrent Protection (RCBO) designed to protect low-voltage electrical circuits against earth leakage, overloads and short circuits. It combines residual current protection and overcurrent protection in one compact DIN rail mounted device.
As part of the Chint NB310L RCBO series, this unit is suitable for residential, commercial and light industrial installations where dependable circuit protection and efficient distribution board design are required. Its 2-pole configuration switches both line and neutral, supporting safe isolation in single-phase electrical systems.
With a rated current of 20 A, B curve tripping characteristic, Type A residual current protection and a 30 mA residual operating current, the NB310L-2P-B20 is ideal for general final circuits and loads with lower inrush current. Its 6 kA breaking capacity provides dependable protection for modern electrical installations.
Key Advantages
- Compact RCBO combining residual current and overcurrent protection.
- 20 A rated current suitable for general-purpose final circuits.
- B curve tripping characteristic for circuits with low inrush current.
- 2-pole configuration switches both line and neutral.
- Type A residual current protection detects AC and pulsating DC residual currents.
- 6 kA breaking capacity for reliable short circuit protection.
Key Features
- Chint NB310L residual current operated circuit breaker series.
- 20 A rated current.
- B curve instantaneous tripping.
- 2-pole design.
- Rated voltage: 230 V AC.
- Rated residual operating current: 30 mA.
- Type A residual current protection.
- DIN rail mounting for consumer units and distribution boards.
Reliable Protection for Single-Phase Circuits
RCBOs such as the Chint NB310L-2P-B20 provide combined protection against residual current faults and overcurrent conditions. This helps reduce the risk of electric shock, cable overheating and equipment damage caused by overloads, short circuits or earth leakage faults.
The B curve characteristic makes this model suitable for circuits with lower starting currents, including lighting, small power and general-purpose electrical loads. Its Type A residual current protection detects both sinusoidal AC and pulsating DC residual currents, supporting reliable protection for many modern electrical installations.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Lighting circuits.
- General final circuits.
- Small power circuits with low inrush current.
- Light industrial electrical panels.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Residual Current | 30 mA | |
| RCD Type | Type A | |
| Manufacturer | Chint | |
| Series | NB310L | |
| Model | NB310L-2P-B20 | |
| Product type | RCBO / residual current operated circuit breaker with overcurrent protection | |
| Rated current | 20 A | |
| Tripping curve | Type B | |
| Rated voltage | 230 V AC | |
| Frequency | 50 / 60 Hz | |
| Poles | 2P | |
| Residual current type | Type A | |
| Rated residual operating current | 30 mA | |
| Rated short-circuit breaking capacity | 6 kA | |
| Standard | IEC/EN 61009-1 | |
| Mounting type | 35 mm DIN rail | |
| Approximate dimensions | 86 × 36 × 77.1 mm |
Frequently Asked Questions
What is the Chint NB310L-2P-B20 used for?
The Chint NB310L-2P-B20 is used to protect single-phase electrical circuits against earth leakage, overloads and short circuits.
What current rating does the NB310L-2P-B20 have?
This RCBO has a rated current of 20 A, making it suitable for general final circuits and small power applications.
What does B curve mean on this RCBO?
A B curve RCBO is designed for circuits with low inrush current, such as lighting circuits and general-purpose electrical loads.
What residual current protection type is this model?
The NB310L-2P-B20 is a Type A RCBO, designed to detect AC and pulsating DC residual currents.
How is the Chint NB310L-2P-B20 installed?
The device is designed for installation on a standard 35 mm DIN rail inside a consumer unit, distribution board or control panel.
Trusted Circuit Protection for Modern Electrical Installations
Chint NB310L RCBOs are widely used by electricians, contractors and panel builders for dependable residual current and overcurrent protection across residential, commercial and light industrial electrical installations.
