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MCCB 3P 400A 50kA Magnetic Only 400A Frame NM8N Chint

BRAND: CABAC
SKU: 269505
$2,779.20 List price: $3,705.60
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30 Days Return Electricians Unlock Trade Access
Chint NM8N 400A 3P MCCB features 50kA breaking capacity, magnetic-only trip unit for motor protection and a 400A frame. Ideal for switchboard mains protection.

Alternatively Known As: NM8N-400S M 400A 3P MCCB, CHINT magnetic MCCB, motor-protection MCCB, moulded-case circuit breaker

Technical Specifications
  • Product Type: Moulded-case circuit breaker
  • Frame Size: 400A
  • Rated Current: 400A
  • Number of Poles: 3P
  • Breaking Capacity: 50kA at AC 380/400/415V
  • Trip Unit: Magnetic-only release, M type
  • Rated Operational Voltage: Up to 690V AC, 50/60Hz
  • Rated Insulation Voltage: 1,000V
  • Rated Impulse Withstand Voltage: 8kV
  • Mechanical Durability: 15,000 operations
  • Electrical Durability: 1,500 operations
  • Mounting: Fixed front or rear connection; DIN rail compatible
  • Compliance Basis: IEC 60947-1, IEC 60947-2 and IEC 60947-3
  • Dimensions (H x L x W): 157mm x 88.7mm x 105mm
  • Weight: 1.85 kg
Key Features
  • 50kA short-circuit breaking capacity at AC 380/400/415V
  • Magnetic-only instantaneous short-circuit protection
  • 400A frame with 400A rated current
  • Three-pole configuration for three-phase systems
  • Suitable for motor and transformer circuit protection where overload protection is provided separately
  • Supports AC systems up to 690V
  • Compact moulded-case construction for switchboard integration
  • Fixed mounting with front or rear connection options
Professional Installation Requirements
  • Installation, connection, testing and protection coordination must be performed by a licensed electrician in accordance with AS/NZS 3000, manufacturer instructions and applicable switchboard requirements. Magnetic-only protection does not provide thermal overload protection, so a suitable separate overload device may be required.
Applications
  • Three-phase motor circuit short-circuit protection
  • Transformer and industrial equipment protection
  • Main and sub-main switchboard protection where separately coordinated overload protection is installed
  • Commercial and industrial low-voltage distribution systems
  • Electrical equipment requiring high fault-current interruption capacity
Standards & Compliance
  • AS/NZS IEC 60947.2:2015 for low-voltage circuit-breakers
  • AS/NZS 3000:2018 for electrical installation and wiring requirements
Environmental Benefits
  • RoHS-aligned product range helps restrict the use of certain hazardous substances in electrical equipment
  • Durable moulded-case construction can reduce replacement frequency and material waste
  • Supports safe, efficient electrical distribution and motor control systems
Warranty Information

CHINT warranty policy states that other low-voltage apparatus is covered for 27 months from the date of manufacture, subject to authorised sales channels, contract conditions and exclusions for improper installation, misuse or unauthorised modification.

Available Now

Available through authorised CHINT distributors in Australia.

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