Schneider A9N18393 Acti9 C120N MCB 4P 125 A D Curve 10kA

The Schneider Electric A9N18393 is a 4-pole 125 A miniature circuit breaker (MCB) from the Acti 9 C120N range, built for electrical power distribution. Equipped with a D tripping curve and thermomagnetic protection technology, it delivers a breaking capacity of 10 kA Icn at 230...400 V AC per EN/IEC 60898-1, suited for circuits with high inrush currents.

Technical specifications:

• Commercial reference: A9N18393
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 C120
• Product type: Miniature circuit breaker (MCB)
• Number of poles: 4P (4 protected poles)
• Rated current [In]: 125 A at 30°C
• Rated voltage [Ue]: 220...415 V AC 50/60 Hz / up to 500 V DC
• Tripping curve: D
• Protection technology: Thermomagnetic
• Overcurrent protection range: 10...14 x In
• Breaking capacity [Icn]: 10 kA at 230...400 V AC (EN/IEC 60898-1)
• Ultimate breaking capacity [Icu]: 20 kA at 220...240 V AC / 10 kA at 380...415 V AC / 6 kA at 440 V AC (EN/IEC 60947-2)
• Rated insulation voltage [Ui]: 500 V AC
• Rated impulse withstand voltage [Uimp]: 6 kV
• Mounting: 35 mm symmetrical DIN rail, click-on system
• Dimensions (WxHxD): 108 x 81 x 73 mm
• Weight: 0.82 kg
• IP protection: IP20 (IEC 60529)
• Operating temperature: -25...70°C
• Connection: Tunnel terminals, 1...50 mm² rigid / 1.5...35 mm² flexible
• Tightening torque: 3.5 N.m
• Mechanical endurance: 20,000 cycles
• Certification: EAC

Features and benefits:

• D curve thermomagnetic tripping provides reliable protection for circuits with high inrush current loads
• Suitable for use as an isolating device per IEC 60947-2, enabling safe maintenance isolation
• Click-on DIN rail mounting with comb busbar compatibility simplifies panel assembly
• Contact position indicator and ON/OFF local signalling give clear visual status at a glance
• Wide operating temperature range of -25...70°C supports use in demanding environments
• Differential protection capability available via a separate add-on block

Applications:

• Main and sub-distribution boards in commercial and industrial electrical installations
• Protection of outgoing circuits subject to high inrush currents
• Low-voltage switchgear assemblies requiring combined AC and DC circuit protection
• Industrial control panels where isolating function at distribution level is required

Compliant with EN/IEC 60898-1 and EN/IEC 60947-2. Part of the Schneider Electric Acti 9 C120 range.

Also known as: Schneider A9N18393, Schneider Electric A9N18393, Acti9 C120N 4P 125A D curve MCB.