Trade Discount 25%
MCB 3P 63A 6kA D Curve DIN Rail NB1-63 Chint
Chint NB1-63 3P 63A 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, Thermal-Magnetic Circuit Breaker
Technical Specifications
- Product Series: NB1-63
- Number of Poles: 3P
- Rated Current: 63 A
- Tripping Characteristic: D curve, 10–14 times rated current
- Rated Voltage: 400 V AC
- Rated Frequency: 50/60 Hz
- Rated Breaking Capacity: 6 kA
- Rated Service Short-Circuit Capacity: 6 kA
- Insulation Voltage: 500 V
- Impulse Withstand Voltage: 4 kV
- Protection Function: Thermal-magnetic overload and short-circuit protection
- Mounting: TH35 DIN rail
- Terminal Capacity: Up to 25 mm² conductor
- Protection Degree: IP20
- Electrical Endurance: 4,000 operations
- Mechanical Endurance: 20,000 operations
- Energy Limiting Class: 3
- Dimensions (H x L x W): 86mm x 78mm x 54mm
- Weight: 0.35 kg
Key Features
- Three-pole protection for three-phase AC circuits
- D-curve magnetic release suitable for high-inrush loads such as transformers and motors
- 6kA rated short-circuit breaking capacity
- Thermal-magnetic protection against overloads and short circuits
- DIN rail mounting for switchboards and distribution boards
- Top or bottom cable connection
- Compatible with selected auxiliary, alarm, shunt-release and undervoltage accessories
- Suitable for domestic, commercial and light industrial installations
Professional Installation Requirements
- Installation, testing and commissioning should be performed by a licensed electrician in accordance with AS/NZS 3000 and applicable local electrical regulations. Confirm circuit fault levels, conductor ratings, discrimination and suitability of the D-curve characteristic before installation.
Applications
- Three-phase domestic distribution boards
- Commercial switchboards
- Light industrial control panels
- Motor and transformer circuits with high starting or inrush current
- Overload and short-circuit protection in low-voltage AC installations
Standards & Compliance
- The product is specified to IEC/EN 60898-1. AS/NZS 60898.1:2024 is the applicable Australian/New Zealand product standard for household and similar AC miniature circuit-breakers; confirm product-specific Australian approval and local regulatory acceptance before installation.
- Installation should comply with AS/NZS 3000:2018, Wiring Rules.
Environmental Benefits
- Long mechanical and electrical service life can reduce replacement frequency and associated waste
- Compact DIN rail design reduces material use and switchboard space requirements
- Metal and thermoplastic components can be separated for appropriate end-of-life recycling where local facilities accept them
- Thermal-magnetic protection helps prevent damage to connected equipment and reduce premature component replacement
Warranty Information
CHINT's general policy for other low-voltage apparatus provides a 27-month warranty from the date of manufacture against defects in materials and workmanship when purchased through authorised sales channels; local Australian terms may vary.
Available Now
Available through authorised CHINT distributors in Australia.
