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MCCB 3P 40A 50kA Thermal Magnetic 125A Frame NM8N Chint

BRAND: CABAC
SKU: 271585
$714.30 List price: $952.40
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Chint NM8N 40A 3P MCCB features 50kA breaking capacity, thermal-magnetic trip unit and a 125A frame. Ideal for switchboard mains and sub-mains protection.

Alternatively Known As: CHINT NM8N-125S 3P 40A MCCB, 125A Frame Moulded Case Circuit Breaker, Adjustable Thermal-Magnetic Circuit Breaker

Technical Specifications
  • Circuit Breaker Type: Moulded case circuit breaker
  • Number of Poles: 3P
  • Rated Current: 40A
  • Frame Size: 125A
  • Trip Unit: Adjustable thermal-magnetic
  • Thermal Adjustment Range: 28–40A
  • Magnetic Trip Setting: 400A
  • Rated Short-Circuit Capacity Icu: 50kA at 380/400/415/440V AC
  • Rated Service Breaking Capacity Ics: 50kA at 380/400/415/440V AC
  • Rated Operational Voltage: Up to 690V AC, 50/60Hz
  • Rated Insulation Voltage Ui: 1000V
  • Rated Impulse Withstand Voltage Uimp: 8kV
  • Utilisation Category: A
  • Mounting: Fixed, front connection; top or bottom line entry
  • Mechanical Life: Up to 25,000 operations
  • Electrical Life: Up to 10,000 operations at AC 415V
  • Operating Temperature: -40°C to +70°C
  • Product Standard: IEC/EN 60947-2
  • Dimensions (H x L x W): 140mm x 90mm x 78.5mm
  • Weight: 1.19 kg
Key Features
  • 50kA short-circuit breaking capacity at common low-voltage system voltages
  • Adjustable thermal-magnetic protection for overload and short-circuit faults
  • Compact 125A frame with a 40A rated trip unit
  • Three-pole configuration for three-phase distribution systems
  • Suitable for switchboard mains, sub-mains and industrial power distribution
  • Supports isolation and fixed installation
  • Zero-arcing design and current-limiting performance
  • Compatible with selected CHINT NM8N accessories
Professional Installation Requirements
  • Installation, testing and commissioning must be performed by a licensed electrician in accordance with the applicable wiring rules, manufacturer instructions and site fault-level requirements. Confirm coordination, cable ratings, discrimination and enclosure suitability before installation.
Applications
  • Switchboard mains protection
  • Sub-main and feeder protection
  • Three-phase commercial and industrial distribution
  • Plant and machinery supply protection
  • Low-voltage building services and infrastructure
  • Overload and short-circuit protection in distribution boards
Standards & Compliance
  • Applicable product standard: AS/NZS IEC 60947.2:2015 for low-voltage circuit-breakers
  • Manufacturer documentation specifies IEC/EN 60947-2; confirm Australian conformity and RCM requirements for the intended installation
Environmental Benefits
  • Thermal-magnetic protection can help prevent damage to cables and equipment, reducing premature replacement waste
  • Long mechanical and electrical service life can reduce product replacement frequency
  • Metallic and polymer components may be recyclable through appropriate electrical equipment recycling streams
  • Designed for use in electrical distribution systems that can support efficient and reliable power management
Warranty Information

CHINT's general warranty policy provides 27 months from the date of manufacture for other low-voltage apparatus sold through authorised sales channels, subject to the applicable contract terms and warranty conditions.

Available Now

Available through authorised CHINT distributors in Australia.

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