Trade Discount 25%
MCB 3P 20A 6kA D Curve DIN Rail NB1-63 Chint
Chint NB1-63 3P 20A MCB features 6kA breaking capacity, D-curve thermal-magnetic protection and DIN rail mount to IEC 60898. For domestic and commercial boards.
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Alternatively Known As: 3P MCB, Three-Phase Miniature Circuit Breaker, DIN Rail Circuit Breaker, D20 MCB
Technical Specifications
- Rated Current: 20 A
- Number of Poles: 3P
- Tripping Curve: D curve
- Rated Breaking Capacity: 6 kA
- Rated Voltage: 230/400 V AC
- Rated Frequency: 50/60 Hz
- Insulation Voltage: 500 V
- Impulse Withstand Voltage: 4 kV
- Protection Degree: IP20
- Energy Limiting Class: 3
- Terminal Capacity: Up to 25 mm² cable
- Tightening Torque: 2.0 N·m
- Mounting: 35 mm EN 60715 DIN rail
- Electrical Life: 10,000 operations
- Mechanical Life: 20,000 operations
- Manufacturer Reference: NB1-63 3P D20 6kA DB
- Manufacturer Code: 179716
- Dimensions (H x L x W): 86mm x 78mm x 54mm
- Weight: 0.33 kg
Key Features
- Thermal-magnetic protection against overload and short-circuit currents
- D-curve characteristic suitable for circuits with high inrush currents
- Three-pole switching for three-phase distribution circuits
- 6 kA rated short-circuit breaking capacity under IEC/EN 60898-1
- Fast-clip mounting on standard 35 mm DIN rail
- Cable and busbar connection options
- Contact position indication
- Compatible with selected CHINT NB1-63 auxiliary and release accessories
Professional Installation Requirements
- Installation and connection to mains electrical circuits must be performed by a licensed electrician in accordance with applicable Australian wiring rules, including AS/NZS 3000. The breaker must be selected and coordinated with the installation's prospective fault current, cable capacity and enclosure requirements.
Applications
- Three-phase domestic distribution boards
- Commercial switchboards and consumer units
- Protection of motors, pumps and transformers with high starting current
- HVAC and refrigeration control panels
- Industrial control and power distribution assemblies
Standards & Compliance
- AS/NZS 60898.1:2024 – applicable standard for circuit-breakers for overcurrent protection in household and similar installations; confirm product approval and marking for the intended Australian installation
- AS/NZS 3000 – applicable Australian installation requirements for low-voltage electrical equipment
Environmental Benefits
- Metal components such as copper and steel can be recovered through established electrical equipment recycling streams
- RoHS documentation is available for the NB1-63 product series, supporting restriction of hazardous substances
- Resettable overcurrent protection avoids routine replacement of fuses and can extend switchboard service life
- Durable DIN rail construction can reduce replacement waste over the service life of the distribution board
Warranty Information
CHINT warranty policy provides 27 months from the date of manufacture for other low-voltage apparatus, subject to purchase through authorised sales channels and the applicable policy terms.
Available Now
Available through authorised CHINT distributors in Australia.
