Trade Discount 25%
MCB 2P 25A 6kA B Curve DIN Rail NB1-63 Chint
Chint NB1-63 2P 25A MCB features 6kA breaking capacity, B-curve thermal-magnetic protection and DIN rail mount to IEC 60898. For domestic and commercial boards.
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Alternatively Known As: Miniature Circuit Breaker, Thermal-Magnetic Circuit Breaker, DIN Rail MCB, NB1-63/B25-2P-6
Technical Specifications
- Product Series: NB1-63
- Poles: 2P
- Rated Current: 25A
- Tripping Characteristic: B curve
- Rated Voltage: 230/400V AC or 240/415V AC
- Rated Frequency: 50/60Hz
- Breaking Capacity: 6kA
- Insulation Voltage: 500V
- Impulse Withstand Voltage: 4kV
- Protection Type: Thermal-magnetic overload and short-circuit protection
- Mounting: 35mm DIN rail to EN 60715
- Terminal Connection: Cable, U-type busbar or pin-type busbar
- Terminal Size: Up to 25mm² cable
- Terminal Tightening Torque: 2.0N·m
- Protection Degree: IP20
- Reference Ambient Temperature: 30°C
- Product Code: 179647
- Dimensions (H x L x W): 86mm x 78mm x 36mm
- Weight: 0.22 kg
Key Features
- Two-pole circuit protection and isolation
- B-curve characteristic suited to primarily resistive loads such as lighting and heating
- 6kA short-circuit breaking capacity
- Compact modular design occupying two DIN modules
- Suitable for residential, commercial and light industrial distribution boards
- Top or bottom electrical connection
- Compatible with selected auxiliary, shunt-release, undervoltage-release and alarm-contact accessories
- Visual contact-position indication
Professional Installation Requirements
- Installation, selection and testing should be performed by a licensed electrician in accordance with the applicable wiring rules, switchboard requirements and manufacturer instructions. Verify system fault levels, conductor sizing and local approval markings before installation.
Applications
- Residential distribution boards
- Commercial electrical switchboards
- Lighting circuits
- Heating circuits
- General low-voltage AC final circuits
- DIN rail modular protection assemblies
Standards & Compliance
- IEC/EN 60898-1 is the specified product standard for this NB1-63 variant
- AS/NZS 60898.1:2024 is the applicable Australian/New Zealand 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 applies to selection, installation and verification within Australian electrical installations
Environmental Benefits
- Long service life can reduce replacement frequency and associated product waste
- Metallic and thermoplastic components may be recoverable through appropriate electrical equipment recycling streams
- Automatic overload and short-circuit protection can help prevent equipment damage and premature replacement
Warranty Information
CHINT warranty policy provides a 27-month warranty from the date of manufacture for other low-voltage apparatus, subject to purchase through authorised sales channels and the applicable warranty terms.
Available Now
Available through authorised CHINT distributors in Australia.
