Schneider A9N18363 Miniature Circuit Breaker (MCB), Acti9 C120N, 2P C125A 10kA

The Schneider Electric A9N18363 is a 2-pole miniature circuit breaker (MCB) from the Acti 9 C120N range, rated at 125 A with a C tripping curve. Designed for electrical distribution applications, it delivers a breaking capacity of 10 kA at 230-400 V AC and is suitable for use on AC and DC networks.

Technical specifications:

• Commercial reference: A9N18363
• Manufacturer: Schneider Electric
• Series / range: Acti 9 C120
• Product type: Miniature Circuit Breaker (MCB)
• Number of poles: 2P
• Number of protected poles: 2
• Neutral position: Left
• Rated current: 125 A at 30°C
• Tripping curve: C
• Network type: AC / DC
• Protection technology: Thermomagnetic
• Breaking capacity (Icn): 10 kA at 230-400 V AC 50/60 Hz (EN/IEC 60898-1)
• Breaking capacity (Icu): 20 kA at 220-240 V AC; 10 kA at 380-415 V AC; 6 kA at 440 V AC; 10 kA at <= 250 V DC (EN/IEC 60947-2)
• Rated voltage: 220-240 V / 380-415 V / 440 V AC 50/60 Hz; <= 250 V DC
• Rated insulation voltage: 500 V AC 50/60 Hz
• Rated impulse withstand voltage: 6 kV
• Overcurrent protection range: 5-10 x In
• Limitation class: 3
• IP protection rating: IP20 (IEC 60529)
• Mounting: 35 mm symmetric DIN rail, snap-on
• Width: 54 mm
• Height: 81 mm
• Depth: 73 mm
• Weight: 0.41 kg
• Connection type: Tunnel terminals, 1-50 mm² solid / 1.5-35 mm² flexible
• Tightening torque: 3.5 N.m
• Operating temperature: -25 to 70°C
• Storage temperature: -40 to 85°C
• Standards: EN/IEC 60947-2, EN/IEC 60898-1
• Certification: EAC
• Mechanical endurance: 20,000 cycles
• Electrical endurance: 5,000 cycles (IEC 60947-2)
• Warranty: 18 months

Features and benefits:

• C curve characteristic provides reliable protection for resistive and slightly inductive loads with high inrush currents
• Suitable for isolation per IEC 60947-2, enabling safe maintenance procedures
• Comb busbar compatible for streamlined panel wiring
• Handle sealable in ON or OFF position with cable diameter 0.7 mm for tamper prevention
• Wide operating temperature range (-25 to 70°C) supports installation in demanding environments
• DC-rated up to 250 V, suitable for photovoltaic and battery-backed distribution systems

Applications:

• Main or sub-main circuit protection in commercial and industrial distribution boards
• Protection of outgoing circuits in large switchgear panels and busbar systems
• Industrial power distribution where high breaking capacity and isolation are required
• DC distribution circuits in photovoltaic or energy storage installations

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

Also known as: Schneider A9N18363, Schneider Electric A9N18363, Acti9 C120N 2P 125A MCB, Schneider 125A miniature circuit breaker.