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Schneider Electric A9S2P040 Acti9 iSW 40A Main Switch Disconnector

The Schneider Electric A9S2P040 is a high-tier 40A double-pole (1P+N) switch disconnector from the industry-leading Acti9 iSW series. Engineered for 415V applications, this manual toggle mechanism provides a robust solution for circuit isolation in both commercial and industrial distribution boards. With its AC-23A utilization category, it is specifically designed to handle the making and breaking of inductive loads, ensuring long-term mechanical and electrical reliability where standard switches fail.

Quick Answer

The Schneider A9S2P040 is a 2-pole, 40A main switch used for manual circuit isolation. It is ideal for 1-phase + Neutral setups on DIN rails but requires separate upstream protection as it does not include internal overload or short-circuit trip functions.

✓Heavy-duty 40A rated current at 415V for industrial-grade performance.
✓AC-23A utilization category allows for switching of highly inductive loads.
✓Dual-pole (1P + N) configuration ensures complete isolation of the circuit.
✓Standard 35mm DIN rail compatibility for seamless Acti9 distribution board integration.
✓High-quality thermoplastic housing with IP40 protection (within enclosure).

Choose the Schneider A9S2P040 if you need a premium, space-saving 40A isolation switch for a 1-Phase + Neutral circuit. It is the gold standard for those who prioritize the reliability of the Acti9 iSW series and require a dedicated disconnector that can handle inductive switching without degrading.

✓ Who Should Buy

  • •Industrial panel builders needing a reliable 40A DIN-rail isolation point.
  • •Facility managers upgrading commercial HVAC or lighting control panels.
  • •Residential electricians installing 1P+N mains for high-load appliances.

✕ Who Should Avoid

  • •Users looking for a circuit breaker with automatic trip protection (this is a disconnector only).
  • •Large industrial plants requiring 3-Phase (3P or 4P) isolation in a single unit.
Product Overview
The Schneider Electric A9S2P040 represents the pinnacle of modular disconnection technology within the Acti9 iSW ecosystem. This 2-pole device is a dedicated isolation solution, allowing maintenance personnel to safely de-energize circuits under load. Its origin in France signifies high-precision engineering, specifically tailored for environments where operational uptime and safety are non-negotiable. The toggle-style manual operation provides clear tactile feedback and visible status indication, which is critical for safety compliance in professional electrical installations. Designed with the modern installer in mind, the A9S2P040 features robust screw terminals that minimize contact resistance and heat generation during continuous 40A operation. While its primary role is isolation, its ability to withstand the stresses of AC-23A switching makes it versatile enough for motor loads and complex HVAC control circuits. As part of the Acti9 range, it maintains a consistent aesthetic and functional profile with Schneider’s circuit breakers, ensuring a clean and professional look within any electrical panel.

BrandSchneider Electric
Model NameA9S2P040
TypeMain Switch Disconnector
SeriesActi9 iSW
Housing MaterialThermoplastic
Country Of OriginFrance
Release Year2010

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Engineering Analysis
From an engineering standpoint, the A9S2P040 is a non-automatic switch-disconnector. Its internal architecture lacks a thermal-magnetic trip unit, which allows the design to focus entirely on low-impedance current carrying and high-capacity switching. The AC-23A rating is the most significant technical spec here; it implies the contacts are reinforced to suppress the arcs generated when breaking inductive currents. The 1P+N configuration is vital for modern safety, ensuring that both the live phase and the neutral line are disconnected simultaneously, preventing potential 'back-feed' or neutral-to-ground faults during maintenance procedures.

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