Acti9 NG125N 3P 125 A C Curve Automatic Switch

Miniature three-phase (3P) automatic circuit breaker Acti9 NG125N, designed to protect electrical circuits in industrial environments and small businesses. With a rated current of 125 A at 40 °C and C curve, it provides thermal-magnetic protection for circuits with current above 0.1 A. Its breaking capacity Icu reaches 25 kA at 380...415 V AC, ensuring stability under overload or short-circuit conditions.

Technical Features

• Number of poles: 3P
• Number of protected poles: 3
• Rated current [In]: 125 A at 40 °C
• Power supply type: Alternating current (AC)
• Tripping unit technology: Thermal-magnetic
• Curve code: C
• Breaking capacity [Icu]: 25 kA (380...415 V AC)
• Service breaking capacity [Ics]: 18.75 kA (75 % of Icu) at 380...415 V AC
• Rated operating voltage [Ue]: 220...240 V AC, 380...415 V AC, 440 V AC, 500 V AC
• Rated insulation voltage [Ui]: 690 V AC
• Surge voltage withstand [Uimp]: 8 kV
• Magnetic trip limit: 8 x In
• Service category: A (in accordance with EN > 50 A)
• Switching capability: Yes
• Supply frequency: 50/60 Hz
• Position indicator: Yes
• Local indicators: On/off indication, trip indicator
• Control type: Manual trip test, handle
• Mounting type: Adjustable clip
• Mounting support: Symmetrical 35 mm DIN rail
• Step size: 9 mm
• Height: 103 mm
• Width: 81 mm
• Depth: 81 mm
• Weight: 0.72 kg
• Mechanical durability: 20 000 cycles
• Electrical durability: 5 000 cycles
• Lockable: With lock
• Locking options: Integrated lock
• Connections: Tunnel-type terminals (16…70 mm² rigid, 10…50 mm² flexible)
• Stripping length: 20 mm
• Tightening torque: 6 N·m
• Earth leakage protection: Independent lock
• Protection degree IP: IP20
• Impact protection degree IK: IK05
• Contamination degree: 3
• Overvoltage category: IV
• Tropicalization: 2
• Relative humidity: 95 % at 55 °C
• Operating ambient temperature: -30…70 °C
• Storage ambient temperature: -40…70 °C
• Standards: Icu
• Sustainable offering status: Green Premium product
• Compliant with REACh without SVHC: Yes
• EU RoHS Directive: Compliant
• RoHS exemptions: Yes
• China RoHS regulation: Proactive declaration
• WEEE: Must be recycled according to specific system in the EU