Acti9 NG125L 3P 63 A C Curve Automatic Switch

Miniature 3P automatic switch from the Acti9 NG125 range, designed to protect three-phase circuits in electrical installations of small businesses and small buildings. Its thermal-magnetic technology enables rapid disconnection during overloads and short circuits, ensuring system safety. Mounts on a 35 mm DIN rail with clip adjustment, includes contact position indicator and integrated lock for operational safety.

Technical Features

• Number of poles: 3P
• Number of protected poles: 3
• Rated current [In]: 63 A at 40 °C
• Supply type: Alternating current AC
• Tripping unit technology: Thermal-magnetic
• Curve code: C
• Breaking capacity code: L
• Breaking capacity [Icu]: 50 kA at 380...415 V AC 50/60 Hz
• Service breaking capacity [Ics]: 37.5 kA (75 % of Icu) at 380...415 V AC 50/60 Hz
• Rated operating voltage [Ue]: 220...240 V AC 50/60 Hz, 380...415 V AC 50/60 Hz, 440 V AC 50/60 Hz, 500 V AC 50/60 Hz
• Rated insulation voltage [Ui]: 690 V AC 50/60 Hz
• Surge voltage withstand [Uimp]: 8 kV
• Magnetic trip threshold: 8 x In ± 20%
• Service category: A according to EN > 50 A
• Switching capacity: Yes according to EN > 50 A
• Supply frequency: 50/60 Hz
• Contact position indicator: Yes
• Local indicators: On/off indication, trip indicator
• Control type: Handle, manual trip test
• Mounting type: Clip-adjustable
• 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: 20000 cycles
• Electrical durability: 10000 cycles
• Lockable: With lock
• Locking options: Integrated lock
• Connections: Tunnel-type terminals 1.5…50 mm² rigid, 1…35 mm² flexible
• Stripping length: 20 mm
• Tightening torque: 3.5 N·m
• Protection degree IP: IP20 according to
• Protection degree IK: IK05 according to EN/IEC 62263
• Contamination degree: 3 according to EN > 50 A
• Overvoltage category: IV
• Tropicalization: 2 according to IEC 60068-1
• Relative humidity: 95 % at 55 °C
• Maximum operating altitude: 2000 m
• 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
• Free of toxic heavy metals: Yes
• Mercury-free: Yes
• RoHS exemption information: Yes
• China RoHS regulation: Proactive China RoHS declaration (outside legal RoHS China scope)
• WEEE: In the European Union market, the product must be disposed of according to a specific waste collection system and must never end up in a regular trash container