Schneider 18642 Acti9 NG125N Miniature circuit breaker 3P C100A 25kA

Schneider Electric 18642 is a 3-pole, 100 A miniature circuit breaker (MCB) from the Acti 9 NG125N series, designed for AC and DC electrical distribution. It uses thermomagnetic protection with a C tripping curve, delivering up to 25 kA breaking capacity at 380-415 V AC and 50 kA at 220-240 V AC.

Technical specifications:

• Commercial reference: 18642
• Manufacturer: Schneider Electric
• EAN:
• Series: Acti 9 NG125
• Device code: NG125N
• Poles: 3P
• Rated current [In]: 100 A at 40°C
• Tripping curve: C
• Network type: AC / DC
• Rated voltage [Ue]: 220-240 / 380-415 / 440 / 500 V AC; up to 375 V DC
• Breaking capacity [Icu]: 50 kA at 220-240 V AC; 25 kA at 380-415 V AC; 20 kA at 440 V AC / up to 375 V DC; 10 kA at 500 V AC
• Overcurrent protection limit: 8 x In
• Rated insulation voltage [Ui]: 690 V AC
• Rated impulse withstand voltage [Uimp]: 8 kV
• Mounting: 35 mm symmetrical DIN rail, click-on system
• Dimensions (W x H x D): 81 x 103 x 81 mm
• Weight: 0.72 kg
• Connection terminals: Tunnel type, 16-70 mm² rigid / 10-50 mm² flexible
• Tightening torque: 6 N.m
• IP rating: IP20 (IEC 60529)
• Operating temperature: -30 to 70°C
• Standard: EN/IEC 60947-2

Features and benefits:

• Suitable for use as an isolating device per IEC 60947-2, enabling safe maintenance isolation
• Compatible with both AC and DC networks for installation flexibility
• Integrated locking provision for lockout safety procedures
• Contact position indicator and trip indicator for clear local signalization
• Accepts rigid 16-70 mm² and flexible 10-50 mm² cables via tunnel terminals

Applications:

• Main and sub-distribution boards in commercial and industrial buildings
• Overcurrent protection in AC and DC power distribution panels
• Outgoing circuit protection where high breaking capacity is required
• Industrial switchgear requiring safe isolation capability

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

Also known as: Schneider 18642, Schneider Electric 18642, NG125N 3P 100A MCB, Schneider NG125N circuit breaker.