Schneider A9K24440 Miniature Circuit Breaker (MCB), Acti9 iK60N 4P C40A 6kA

The Schneider Electric A9K24440 is a 4-pole miniature circuit breaker (MCB) from the Acti9 iK60N series, rated at 40A with a C tripping curve and 6000A breaking capacity per IEC/EN 60898-1. Designed for distribution applications on AC networks, it provides reliable overcurrent protection with thermal-magnetic trip technology.

Technical specifications:

• Commercial reference: A9K24440
• Manufacturer: Schneider Electric
• Series / range: Acti9 iK60
• Product type: Miniature circuit breaker (MCB)
• Device short name: iK60N
• Application: Distribution
• Number of poles: 4P
• Number of protected poles: 4
• Rated current [In]: 40 A at 30°C
• Network type: AC
• Trip unit technology: Thermal-magnetic
• Tripping curve: C
• Magnetic tripping limit: 5...10 x In
• Rated operational voltage [Ue]: 400 V AC 50/60 Hz
• Network frequency: 50/60 Hz
• Breaking capacity [Icn]: 6000 A at 400 V AC 50/60 Hz
• Rated service breaking capacity [Ics]: 6000 A (100% x Icn) at 400 V AC 50/60 Hz
• Limitation class: 3
• Rated insulation voltage [Ui]: 440 V AC 50/60 Hz
• Rated impulse withstand voltage [Uimp]: 4 kV
• Suitability for isolation: Yes
• Mounting: Clip-on, 35 mm DIN rail
• Connection pitch: 18 mm between phases
• Connection terminals: Tunnel type (top or bottom), rigid 1...35 mm², flexible 1...25 mm²
• Wire stripping length: 14 mm
• Tightening torque: 3.5 N.m
• Width: 72 mm
• Height: 85 mm
• Depth: 78.5 mm
• Weight: 400 g
• IP protection rating: IP20 (IEC 60529)
• Operating temperature: -25...60°C
• Storage temperature: -40...85°C
• Pollution degree: 2
• Overvoltage category: II
• Mechanical durability: 20000 cycles
• Electrical durability: 10000 cycles
• Standard: EN/IEC 60898-1
• Certifications: SNI
• Colour: White

Features and benefits:

• Thermal-magnetic trip technology provides reliable protection against overloads and short circuits.
• C tripping curve with magnetic range of 5...10 x In suits distribution circuits with moderate inrush loads.
• 100% rated service breaking capacity (Ics = Icn = 6000 A) ensures consistent performance under fault conditions.
• Padlocking device option supports lockout/tagout safety procedures.
• Wide operating temperature range (-25...60°C) allows installation in demanding environments.
• Suitable for isolation per EN/IEC 60898-1, enabling use as a disconnecting means.

Applications:

• Final distribution boards in residential and commercial buildings.
• Industrial distribution panels requiring 4-pole overcurrent protection on 400 V AC networks.
• Protection of three-phase and neutral conductors in sub-distribution systems.
• Control panels where lockout/tagout isolation capability is required.

Compliant with EN/IEC 60898-1. Part of the Schneider Electric Acti9 iK60 range.

Also known as: Schneider A9K24440, Schneider Electric A9K24440, Acti9 iK60N 4P 40A MCB, 4-pole miniature circuit breaker C40.