Schneider Electric ATSU01N212LT ATSU01 3P 12A 200-480V 2.2-5.5kW Altistart 01 Soft Starter

The Schneider Electric ATSU01N212LT is a 3-phase electronic soft starter from the Altistart 01 (ATSU01) series, rated at 12A for motors from 2.2 to 5.5kW across a wide supply voltage range of 200 to 480V AC. Designed for engineers and procurement professionals who need reliable reduced-voltage motor starting, the ATSU01 delivers smooth torque control and reduced inrush current, protecting motors and driven machinery during acceleration and deceleration cycles.

Technical Specifications

Applications & Use Cases

• Pump & Fan Starting: The ATSU01 soft starter limits starting current and mechanical shock, extending the service life of pumps, fans, and compressors driven by three-phase induction motors.
• Conveyor & Conveying Systems: Gradual ramp-up prevents belt slippage and mechanical stress, making this motor soft starter ideal for conveyors and material-handling equipment.
• HVAC Equipment: Reduced voltage starting protects HVAC motors from high inrush current, reducing energy costs and wear on contactors and switchgear.
• Industrial Machinery: Any 3-phase motor application in the 2.2–5.5 kW range benefits from the electronic soft starter's torque control and motor protection features.

Frequently Asked Questions

• What is the supply voltage range of the ATSU01N212LT? The ATSU01 operates on a 3-phase supply of 200 to 480V AC, making it suitable for both 230V and 400–480V industrial networks.
• What motor sizes does this soft starter support? The ATSU01N212LT is rated for motors from 2.2 kW up to 5.5 kW at 12A continuous current.
• How does a soft starter differ from a variable speed drive? A soft starter provides reduced-voltage starting and stopping only; it does not vary motor speed during normal operation. A VFD controls speed continuously. For fixed-speed applications requiring gentle starting, the ATSU01 is the cost-effective choice.
• Can the ATSU01 be used with a bypass contactor? Yes. Once the motor reaches full speed, an external bypass contactor can be used to shunt the soft starter, reducing heat dissipation and extending the device's service life.