General

• Product range: ComPacT NSX (new generation)
• Type: Molded Case Circuit Breaker (MCCB)
• Application: Power distribution / feeder protection
• Standards: IEC / EN 60947-2
• Utilization category: Category A
• Suitability for isolation: Yes (fully compliant MCCB)

 Electrical ratings

• Rated current (In): 16 → 630 A
• Rated operational voltage (Ue): up to 690 V AC (50/60 Hz)
• Network: AC systems

 Breaking capacity (Icu)

Depends on performance class:

• B (Basic): ~25 kA @ 415 V
• F / N / H / S / L classes:
  • Up to 70 kA @ 415 V (H type)
  • Higher classes available (up to ~150–200 kA depending on frame – per catalogue)

 Insulation & dielectric characteristics

• Rated insulation voltage (Ui): 800 V
• Impulse withstand voltage (Uimp): 8 kV

 Trip units

Thermal-magnetic (TM-D)

• Functions:
  • L: overload (thermal)
  • I: instantaneous short-circuit
• Adjustable overload (Ir ≈ 0.7–1 × In)

Electronic (Micrologic)

• Types: Micrologic 2 / 5 / 6
• Protection:
  • L: long-time
  • S: short-time
  • I: instantaneous
  • G: earth fault (optional)
• Additional:
  • Energy metering
  • Communication (EcoStruxure ready)

 Protection functions

• Overload protection
• Short-circuit protection
• Optional:
  • Earth leakage (Vigi / Micrologic)
  • Zone Selective Interlocking (ZSI)
  • Measurement & communication

 Mechanical characteristics

• Mounting:
  • Fixed
  • Plug-in
  • Withdrawable
• Poles:
  • 3P / 4P
• Typical dimensions (NSX100 frame):
  • Height: ~161 mm
  • Width: ~105 mm
  • Depth: ~86 mm

 Performance & durability

• Mechanical durability: up to 50,000 operations
• Electrical durability:
  • Up to 30,000 cycles (at rated conditions)

 Environmental conditions

• Operating temperature: –25°C to +70°C
• Storage: –50°C to +85°C
• Pollution degree: 3
• Altitude: up to 2000 m without derating

 Key features (new generation)

• Compact design with improved performance
• EverLink terminals (reduced overheating risk)
• Digital-ready (EcoStruxure Power integration)
• Integrated metering & diagnostics
• Modular accessories (aux contacts, shunt trip, motor operator)
• Improved installation (DIN rail, spring auxiliaries)

Typical models

• NSX100 / NSX160 / NSX250 / NSX400 / NSX630
• Breaking capacity classes: B, F, N, H, S, L
• Trip units: TM-D or Micrologic