nb1l-b06 chint rcbo 6a b curve 30ma 36mm 1 pole + neutral

Why Choose the Chint NB1L-B06 RCBO?

The Chint NB1L-B06 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 NB1L series, it combines earth leakage protection, overload protection and short-circuit protection in one modular protective device.

This RCBO is designed for single-phase circuits requiring dependable protection against both over-current faults and residual current leakage. Its B curve tripping characteristic is suitable for circuits with low inrush currents, while the 30 mA residual current sensitivity provides additional protection against electric shock.

With a rated current of 6 A, a rated voltage of 230 / 240 V AC and a short-circuit breaking capacity of 6 kA, the NB1L-B06 is well suited to lighting circuits, control circuits, auxiliary supplies and other low-load final circuits. Its DIN rail mounting format enables quick and secure installation in consumer units and distribution boards.

Key Advantages

• Compact RCBO combining RCD and MCB protection.
• 6 A rated current for low-load final circuits.
• 30 mA residual current sensitivity for additional personal protection.
• B curve characteristic suitable for circuits with low inrush current.
• 6 kA short-circuit breaking capacity for dependable fault protection.
• DIN rail mounting for fast installation in consumer units and distribution boards.

Key Features

• Chint NB1L series RCBO.
• 6 A rated current.
• 30 mA residual operating current.
• B curve over-current protection.
• Type AC residual current protection.
• 6 kA rated short-circuit capacity.
• Provides overload, short-circuit and earth leakage protection.
• DIN rail mounting for modular electrical assemblies.

Technical Specifications

• Manufacturer: Chint
• Series: NB1L
• Model: NB1L-B06
• Product type: Residual current operated circuit breaker with over-current protection / RCBO
• Rated current: 6 A
• Residual operating current: 30 mA
• Residual current type: Type AC
• Tripping curve: B curve
• Rated voltage: 230 / 240 V AC
• Rated frequency: 50 / 60 Hz
• Rated short-circuit capacity: 6 kA
• Rated insulation voltage: 500 V
• Rated impulse withstand voltage: 4 kV
• Mounting type: 35 mm DIN rail
• Protection rating: IP20
• Operating temperature: approx. -5 to +40°C
• Standards: IEC / EN 61009-1

Combined Circuit and Earth Leakage Protection

RCBOs such as the Chint NB1L-B06 combine the functions of an MCB and an RCD in a single device. This enables the circuit to disconnect automatically in the event of overload, short circuit or earth leakage, helping improve electrical safety and circuit reliability.

The NB1L-B06 is suitable where individual circuit protection is required. Protecting each final circuit independently helps minimise disruption, as a fault on one circuit is less likely to disconnect other protected circuits.

Typical Applications

• Consumer units and distribution boards.
• Lighting circuits and low-load final circuits.
• Residential electrical installations.
• Commercial building circuits.
• Control circuits and auxiliary supplies.
• Electrical panels requiring combined over-current and residual current protection.

Trusted by Electrical Installers Worldwide

Chint RCBOs are trusted by electrical contractors, panel builders and maintenance engineers for dependable circuit protection across residential, commercial and industrial electrical installations.