Schneider A9F74450 Acti9 iC60N MCB 4P 50 A C Curve 10kA

The Schneider Electric A9F74450 is a 4-pole miniature circuit breaker (MCB) from the Acti 9 iC60N range, rated at 50 A with a C tripping curve. Designed for AC and DC distribution systems, it delivers thermomagnetic overcurrent protection with a breaking capacity of 10 kA Icu at 380-415 V AC per EN/IEC 60947-2.

Technical specifications:

• Commercial reference: A9F74450
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 iC60
• Number of poles: 4P (4 protected poles)
• Rated current: 50 A
• Network type: AC / DC
• Tripping curve: C
• Protection technology: Thermomagnetic
• Breaking capacity (Icn): 6000 A at 400 V AC 50/60 Hz (EN/IEC 60898-1)
• Breaking capacity (Icu): 10 kA at 380-415 V AC; 20 kA at 220-240 V AC; 10 kA at up to 250 V DC (EN/IEC 60947-2)
• Rated insulation voltage (Ui): 500 V AC 50/60 Hz
• Rated impulse withstand voltage (Uimp): 6 kV
• Overcurrent trip level: 8 x In +/- 20%
• Limitation class: 3
• Usage category: Category A (EN/IEC 60947-2)
• Mounting: DIN rail, fixed
• Dimensions (WxHxD): 72 x 85 x 78.5 mm
• Weight: 0.5 kg
• IP rating: IP20 (IEC/EN 60529)
• Operating temperature: -35 to 70°C
• Storage temperature: -40 to 85°C
• Connection: 1-35 mm² rigid / 1-25 mm² flexible; tightening torque 3.5 N.m
• Mechanical endurance: 20,000 cycles; electrical endurance: 10,000 cycles

Features and benefits:

• Suitable for use as an isolation device per EN/IEC 60898-1 and EN/IEC 60947-2
• Compatible with comb busbar distribution blocks on upper or lower terminals
• Integrated trip indicator provides local fault signalling without additional accessories
• Supports both AC and DC networks for flexible installation in mixed systems
• Overvoltage category IV and pollution degree 3 rating for demanding industrial environments

Applications:

• Final distribution boards in commercial and industrial electrical installations
• Overcurrent protection in industrial switchgear and control panels
• 4-pole circuit protection in AC and DC power distribution systems
• Installations in high-humidity environments, rated for 95% relative humidity at 55°C

Compliant with EN/IEC 60898-1 and EN/IEC 60947-2. Part of the Schneider Electric Acti 9 iC60 range.

Also known as: Schneider A9F74450, Schneider Electric A9F74450, iC60N 4P 50A C curve MCB, Acti9 4-pole miniature circuit breaker.