Schneider 18640 Acti9 NG125N Miniature circuit breaker 3P C80A 25kA

The Schneider Electric 18640 (Acti9 NG125N) is a 3-pole miniature circuit breaker rated at 80 A with a C tripping characteristic, designed for electrical power distribution. It delivers a breaking capacity of 25 kA at 380-415 V AC and is compliant with EN/IEC 60947-2, making it suitable for both AC and DC network applications.

Technical specifications:

• Commercial reference: 18640
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 NG125
• Device short name: NG125N
• Product type: Miniature circuit breaker (MCB)
• Number of poles: 3P
• Number of protected poles: 3
• Rated current [In]: 80 A at 40 °C
• Network type: AC / DC
• Tripping characteristic: C
• Protection technology: Thermomagnetic
• Breaking capacity [Icu]: 50 kA at 220-240 V AC / 25 kA at 380-415 V AC / 20 kA at 440 V AC / 10 kA at 500 V AC / 20 kA at 375 V DC (per EN/IEC 60947-2)
• Service breaking capacity [Ics]: 37.5 kA at 220-240 V AC / 18.75 kA at 380-415 V AC / 15 kA at 440 V AC / 7.5 kA at 500 V AC
• Rated insulation voltage [Ui]: 690 V AC
• Rated impulse withstand voltage [Uimp]: 8 kV
• Overcurrent protection limit: 8 x In
• Usage category: Category A per IEC 60947-2
• Dimensions (WxHxD): 81 x 103 x 81 mm
• Weight: 0.72 kg
• IP protection rating: IP20 per IEC 60529
• IK protection rating: IK05 per EN/IEC 62262
• Operating temperature: -30 to 70 °C
• Storage temperature: -40 to 70 °C
• Relative humidity: 95% at 55 °C
• Mounting: 35 mm symmetrical DIN rail, clip-on system
• Connection: Tunnel terminals, 16-70 mm² rigid / 10-50 mm² flexible
• Tightening torque: 6 N.m
• Strip length: 20 mm
• Mechanical durability: 20,000 cycles
• Electrical durability: 5,000 cycles
• Standard: EN/IEC 60947-2

Features and benefits:

• High breaking capacity of 25 kA at 380-415 V AC for robust short-circuit protection in demanding installations
• Suitable for both AC and DC network types, providing versatile deployment options
• Lockable handle with integrated locking mechanism for controlled access and safety
• Trip indicator and ON/OFF position indicator for clear local status readout
• Wide operating temperature range of -30 to 70 °C for use in harsh environments
• Contact position indicator included for visual confirmation of switching state

Applications:

• Main or sub-distribution boards in commercial and industrial buildings
• Protection of outgoing circuits in low-voltage switchgear and controlgear assemblies
• DC applications including photovoltaic and battery-backed power distribution systems
• Industrial control panels requiring high breaking capacity protection

Compliant with EN/IEC 60947-2. Part of the Schneider Electric Acti 9 NG125 range.

Also known as: Schneider 18640, Schneider Electric 18640, Acti9 NG125N 80A 3P, MCB 80A C-curve 25kA.