Acti9 NG125N 4P 50 A C Curve Automatic Circuit Breaker

Thermal-magnetic circuit breaker of the Acti9 NG125N type, designed to protect electrical circuits in small industrial and commercial installations. Its 4-pole configuration allows protection of three-phase circuits with neutral, ensuring safety in applications with current above 0.1 A. It incorporates thermal-magnetic technology for effective tripping during overloads and short circuits.

Technical Features

• Number of poles: 4P
• Number of protected poles: 4
• Rated current [In]: 50 A at 40 °C
• Network type: AC
• Tripping curve: C
• Breaking capacity [Icu]: 25 kA at 380...415 V AC 50/60 Hz
• Service breaking capacity [Ics]: 18.75 kA at 380...415 V AC 50/60 Hz (75 % of Icu)
• Rated operating voltage [Ue]: 220...240 V, 380...415 V, 440 V, 500 V AC 50/60 Hz
• Rated insulation voltage [Ui]: 690 V AC 50/60 Hz
• Surge voltage withstand [Uimp]: 8 kV
• Supply frequency: 50/60 Hz
• Contact position indicator: Yes
• Local indicators: On/off indication, trip indicator
• Mounting: Adjustable clip, symmetric 35 mm DIN rail mounting support
• Connections: Tunnel-type terminals (1.5…50 mm² rigid, 1…35 mm² flexible)
• Stripping length: 20 mm
• Tightening torque: 3.5 N·m
• Lockable: With integrated lock
• Mechanical durability: 20 000 cycles
• Electrical durability: 10 000 cycles
• Protection degree IP: IP20
• Protection degree IK: IK05
• Operating ambient temperature: -30…70 °C
• Storage ambient temperature: -40…70 °C
• Standards: Icu
• Compliant with RoHS EU, free of toxic heavy metals and mercury