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Schneider Electric A9KS15140BQ Acti9 iSW-NA 40A Main Switch

The Schneider Electric A9KS15140BQ is a high-performance 40A Single Pole Switch Disconnector from the renowned Acti9 iSW-NA series. Designed specifically for control and isolation of electrical distribution circuits, this 415V unit provides a robust physical break in the circuit, ensuring maintenance safety in residential and commercial panel boards. Crafted from high-grade thermoplastic in France, it offers a compact DIN rail solution for systems where dedicated load-breaking is required without the integrated trip functions of a standard circuit breaker.

Quick Answer

The A9KS15140BQ is best used as a primary local isolator in single-phase distribution boards to safely manually disconnect power to downstream circuits for maintenance or emergency stops.

✓Heavy-duty 40A current rating for robust single-phase load management.
✓AC-23A utilization category, optimized for switching frequent inductive loads.
✓IP40 rated front face protection for enhanced user safety within enclosures.
✓Reliable Acti9 iSW-NA series engineering with a proven 2012 design legacy.
✓Compact 1-Pole modular width saves critical space on DIN Rail assemblies.

Choose the Schneider A9KS15140BQ if you require a dedicated, 40A single-pole manual isolator that prioritizes mechanical reliability and clear status indication over integrated overcurrent protection.

✓ Who Should Buy

  • •Electrical contractors installing sub-panels that require a local disconnect switch.
  • •Industrial maintenance teams looking for a reliable Schneider Acti9 replacement part.
  • •Panel builders needing a high-quality, space-saving 1P switch for AC-23A applications.

✕ Who Should Avoid

  • •Users requiring automatic protection against short circuits (look for Acti9 MCBs instead).
  • •Three-phase power applications requiring simultaneous disconnection of all phases.
Product Overview
The Schneider Electric A9KS15140BQ represents a critical component in professional energy management. As part of the Acti9 iSW-NA range, this switch disconnector is engineered for longevity and visibility, featuring a clear isolation function indicator that ensures operators can verify the contact status at a glance. Its thermoplastic housing is designed to withstand thermal stress, making it a staple for high-reliability environments where French engineering standards are preferred. Technically categorized under AC-23A, this model is not just a simple toggle; it is built to handle the rigors of switching motors or other highly inductive loads where high inrush currents are common. While it maintains a sleek, modular profile, its screw terminals are designed for high torque, ensuring a vibration-resistant connection that minimizes heat generation over its operational lifespan.

BrandSchneider Electric
Model NameA9KS15140BQ
TypeMain Switch Disconnector
SeriesActi9 iSW-NA
Housing MaterialThermoplastic
Country Of OriginFrance
Release Year2012

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Engineering Analysis
The internal architecture of the A9KS15140BQ utilizes a rotary-style mechanical linkage that provides a crisp, high-speed make-and-break action. This mechanism is crucial for quenching arcs quickly, which is why it achieves the AC-23A rating. The use of high-quality thermoplastic housing provides excellent dielectric strength and ensures the device remains lightweight yet structurally sound under various mounting orientations on a standard 35mm DIN rail. The isolation function is strictly compliant with IEC/EN standards, ensuring the physical gap between contacts is sufficient to prevent leakage current during 'OFF' states.

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