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MCCB 4P 250A 70kA Thermal Magnetic 400A Frame NM8N Chint

BRAND: CABAC
SKU: 268967
$3,163.00 List price: $4,217.40
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Chint NM8N 250A 4P MCCB features 70kA breaking capacity, thermal-magnetic trip unit with protected neutral and a 400A frame. Ideal for switchboard mains protection.

Alternatively Known As: CHINT NM8N 400AF MCCB, 250A 4-pole moulded case circuit breaker, thermal-magnetic MCCB with protected neutral

Technical Specifications
  • Product Type: Moulded case circuit breaker
  • Frame Size: 400AF
  • Rated Current: 250A
  • Number of Poles: 4P, protected neutral configuration
  • Trip Unit: Thermal-magnetic, TM
  • Ultimate Breaking Capacity: 70kA at 380–415V AC
  • Service Breaking Capacity: 100% of Icu
  • Rated Operational Voltage: 380–415V AC
  • Rated Insulation Voltage: 1000V
  • Rated Frequency: 50/60Hz
  • Operating Temperature: -40°C to +70°C
  • Connection: Screw terminals, fixed front connection
  • Installation: Surface mounting
  • Ingress Protection: IP40
  • Mechanical Endurance: Up to 15,000 operating cycles
  • Electrical Endurance: Up to 4,000 operating cycles at rated current and 415V AC
  • Dimensions (H x L x W): 255mm x 213mm x 185mm
  • Weight: 6.7 kg
Key Features
  • 250A rated current in a 400AF frame
  • Four-pole configuration with protected neutral
  • 70kA short-circuit breaking capacity at 380–415V AC
  • Thermal-magnetic overload and short-circuit protection
  • Handle-operated ON/OFF switching
  • Suitable for fixed surface mounting with screw terminals
  • Supports isolation for switchboard and distribution applications
Professional Installation Requirements
  • Installation, adjustment and testing must be carried out by a licensed electrician in accordance with AS/NZS 3000, the manufacturer's instructions and the requirements of the completed switchboard assembly.
Applications
  • Main incoming protection in commercial and industrial switchboards
  • Low-voltage power distribution boards
  • Building services and plant-room distribution
  • Protection of feeders, bus sections and large electrical loads
  • Industrial and commercial electrical equipment protection
Standards & Compliance
  • Applicable product standard: AS/NZS IEC 60947.2 for low-voltage circuit-breakers
Environmental Benefits
  • Durable construction and long electrical and mechanical service life can reduce replacement frequency and product waste
  • Metallic components can be recovered for recycling at end of service life
  • Thermal-magnetic operation requires no auxiliary electronic power supply for basic protection functions
Warranty Information

CHINT warranty policy for other low-voltage apparatus provides coverage against defects in materials and workmanship for 27 months from the date of manufacture when sold through authorised channels; Australian local terms may apply.

Available Now

Available through authorised CHINT distributors in Australia.

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