Schneider 18672 Miniature Circuit Breaker (MCB), Acti9 NG125N, 4P 80A, 25kA

Schneider Electric commercial reference 18672 is a 4-pole miniature circuit breaker (MCB) from the Acti 9 NG125N series, rated at 80A with a D tripping curve for distribution of electrical energy. It provides high breaking capacity up to 25kA at 380-415V AC and supports both AC and DC network types with thermomagnetic protection technology.

Technical specifications:

• Commercial reference: 18672
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 NG125
• Device short name: NG125N
• Product type: Miniature Circuit Breaker (MCB)
• Number of poles: 4P
• Number of protected poles: 4
• Rated current [In]: 80A at 40°C
• Tripping curve: D
• Network type: AC / DC
• Protection technology: Thermomagnetic
• Breaking capacity [Icu]: 50kA at 220-240V AC 50/60Hz - 25kA at 380-415V AC 50/60Hz - 20kA at 440V AC 50/60Hz - 10kA at 500V AC 50/60Hz - 20kA at 500V DC (per EN/IEC 60947-2)
• Service breaking capacity [Ics]: 37.5kA at 220-240V AC - 18.75kA at 380-415V AC - 15kA at 440V AC - 7.5kA at 500V AC - 20kA at 500V DC
• Rated voltage [Ue]: 220-240V / 380-415V / 440V / 500V AC 50/60Hz; up to 500V DC
• Rated insulation voltage [Ui]: 690V AC 50/60Hz
• Rated impulse withstand voltage [Uimp]: 8kV
• Overcurrent protection limit: 12 x In
• Use category: Category A per IEC 60947-2
• Standard: EN/IEC 60947-2
• Mounting: Click-on system, 35mm symmetrical DIN rail
• Handle position: Vertical
• Width: 108mm
• Height: 103mm
• Depth: 81mm
• Weight: 0.96kg
• 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
• Connection type: Tunnel terminals 16-70mm² rigid / 10-50mm² flexible
• Strip length: 20mm
• Tightening torque: 6 N.m
• Mechanical durability: 20000 cycles
• Electrical durability: 5000 cycles
• Pollution degree: 3 per IEC 60947-2
• Overvoltage category: IV

Features and benefits:

• D tripping curve suits loads with high inrush currents, reducing nuisance tripping in demanding applications
• Dual AC/DC network compatibility makes the NG125N suitable for both conventional and DC-coupled installations
• High breaking capacity of 25kA at 380-415V AC provides robust short-circuit protection in industrial environments
• Integrated lockout capability allows the handle to be secured in the OFF position for maintenance safety
• Contact position indicator and trip indicator provide clear local signalling of device status
• Click-on DIN rail mounting and comb busbar-ready design simplify panel assembly and wiring

Applications:

• Main circuit protection in industrial and commercial electrical distribution boards
• Protection of motors and equipment with high starting inrush currents where D curve is required
• DC distribution systems and photovoltaic or battery-backed installations up to 500V DC
• Outgoing feeder protection in low-voltage switchgear and control panels
• Final sub-distribution in facilities requiring high fault current withstand capability

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

Also known as: Schneider 18672, Schneider Electric 18672, NG125N 4P 80A D-curve MCB, Acti9 NG125N 80A 4-pole circuit breaker.