nb310l-c20 chint rcbo 20a c curve type a 2 pole

Why Choose the Chint NB310L-2P-C20 RCBO?

The Chint NB310L-2P-C20 is a compact and 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 DIN rail mounted device for safe and efficient electrical circuit protection.

As part of the Chint NB310L RCBO series, this unit is suitable for residential, commercial and light industrial installations where dependable protection and efficient distribution board layouts are required. Its 2-pole construction switches both line and neutral, supporting safe isolation in single-phase electrical systems.

With a rated current of 20 A, C curve tripping characteristic, Type A residual current protection and a 30 mA residual operating current, the NB310L-2P-C20 is ideal for socket circuits, power circuits and loads with moderate inrush current. Its 6 kA breaking capacity provides dependable fault protection for modern electrical installations.

Key Advantages

• Compact RCBO combining residual current and overcurrent protection.
• 20 A rated current suitable for general-purpose power circuits.
• C curve tripping characteristic for circuits with moderate 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.
• C 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.

Technical Specifications

• Manufacturer: Chint
• Series: NB310L
• Model: NB310L-2P-C20
• Product type: RCBO / residual current operated circuit breaker with overcurrent protection
• Rated current: 20 A
• Tripping curve: Type C
• 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
• Protection rating: IP20
• Standard: IEC/EN 61009-1
• Mounting type: 35 mm DIN rail
• Dimensions (H × W × D): approx. 86 × 36 × 77 mm

Reliable Protection for General Power Circuits

RCBOs such as the Chint NB310L-2P-C20 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 earth leakage, overloads or short circuits.

The C curve characteristic makes this model suitable for circuits where moderate inrush currents may occur, including socket circuits, small inductive loads and general electrical equipment. Its Type A residual current protection detects both sinusoidal AC and pulsating DC residual currents, supporting reliable protection for modern electrical installations.

Typical Applications

• Residential consumer units.
• Commercial distribution boards.
• Socket outlet circuits.
• General power circuits.
• Final circuits with moderate inrush current.
• Light industrial electrical panels.

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.