40A 3 Pole Schneider Acti9 MCB iC60N C curve 6kA A9F44340

40A 3 Pole Schneider Acti9 MCB iC60N C curve 6kA A9F44340

The Schneider Electric A9F44340 is a 40A three-pole circuit breaker from the Acti9 iC60N Disbo range. It is designed to protect a three-phase circuit against overload and short circuit, with all three phases tripping simultaneously. This device features a C curve and is rated 6000A Icn at 400V AC, adhering to EN/IEC 60898-1 standards. It is DIN rail mountable and occupies three modules.

Built for Tough Environments

• Designed to protect 40A three-phase circuits used for sub-boards and larger fixed plants.
• Operates reliably in challenging conditions, including:
  • Temperature range: -35°C to 70°C.
  • Humidity resistance: Up to 95% at 55°C.
  • Tropicalisation class 2 treatment compliant with IEC 60068-1.
• Ideal for plant rooms, rooftop enclosures, and sheds, which are prone to high temperatures and humidity, especially in coastal and tropical areas.

Compact and Durable Design

• Three modules wide, fitting standard three-phase rails.
• Mechanical endurance: 20,000 operating cycles.
• Electrical endurance: 10,000 cycles, perfect for circuits frequently switched for servicing.
• Features a padlockable handle that can also accommodate a seal in the off position.

Key Features

• 40A across all three phases: Perfect for three-phase sub-mains and larger fixed plants.
• Simultaneous trip for all phases: A fault in any phase disconnects all, ensuring nothing downstream remains live.
• C curve: Magnetic trip activates at 8 times the rated current (approximately 320A), suitable for circuits with motors and compressors.
• 6kA short circuit rating: Rated 6000A at 400V AC under EN/IEC 60898-1.
• 10kA ultimate and 7.5kA in service: Complies with EN/IEC 60947-2 for high-performance fault handling.
• AC and DC compatibility: Rated up to 440V AC and 180V DC.
• Cable capacity: Supports up to 35mm² rigid or 25mm² flexible cables, torqued to 3.5 N.m.
• Energy let-through limitation: Class 3 under EN/IEC 60898-1, minimizing fault energy downstream.
• No earth leakage protection: Designed for overload and short circuit protection only; residual current protection requires an additional block.
• IP20 rating: Offers finger protection but must be installed inside a switchboard or enclosure.

Ideal Applications

• Three-phase sub-main feeds: Provides 40A protection for workshops, sheds, or tenancy boards.
• Plant room and rooftop boards: Designed for enclosures that experience high temperatures during summer.
• Humid and coastal installations: Suitable for sites requiring tropicalisation class 2 treatment.
• Ducted air conditioning units: Protects three-phase packaged and condensing units.
• Compressors and chillers: Ideal for three-phase compressor sets with direct-on-line starting.
• Control panels and machine builds: Fits DIN rail mounting on panels with fixed module widths.
• Switchboard upgrades and rewires: Acts as a clip-on replacement for existing 40A three-phase C curve devices.