Siemens Micromaster 440 without filter 380- 480V, 1.5kW torque Part number 6SE6440-2UD21-5AA1

Product Overview

The Siemens 6SE6440-2UD21-5AA1 is a compact 3-phase variable-frequency drive (VFD) from the MICROMASTER 440 family. It is designed to control and regulate three-phase motors, offering adjustable speed, controlled torque and overload protection with constant-torque output. This inverter is suitable for various industrial motor-drive applications such as pumps, fans, conveyors and small machines — delivering efficient motor control under 380–480 V AC supply systems.

Key Features

• 3-phase AC input inverter — MICROMASTER 440 series, standard frame A
• Rated motor output: 1.5 kW (≈ 2 HP)
• Input voltage: 3-phase 380 … 480 V AC (±10 %), 47–63 Hz
• Output: 3-phase variable voltage/frequency for motor speed control
• High overload capability: up to 150 % for 60 seconds or 200 % for 3 seconds — suitable for motor start-up and heavy load conditions
• Fan-cooled design with built-in cooling fan — supports continuous operation under industrial conditions
• Compact size: approx. 173 mm (H) × 73 mm (W) × 149 mm (D) — ideal for panel or cabinet mounting
• Protection class: IP20 — designed for indoor/enclosed cabinet installations
• Flexible motor control: variable frequency output up to 550 Hz (or 650 Hz depending on configuration), enabling wide speed range for motors

Technical Specifications

• Article Number: 6SE6440-2UD21-5AA1
• Product Family: MICROMASTER 440 (3-phase inverter drives)
• Rated Motor Power (AC-3): 1.5 kW
• Input Voltage: 3-phase 380 … 480 V AC ±10% / 47–63 Hz
• Rated Input Current: approx. 5.9 A (at rated output)
• Output Current (continued load): approx. 4.1 A
• Overload Rating: 150 % for 60 s / 200 % for 3 s (start-up or torque spikes)
• Output Frequency Range: 0 … 550 Hz (engineered for broad speed control)
• Cooling Method: Integrated fan, air-cooled design
• Protection Rating: IP20 (for control cabinet mounting)
• Ambient Operating Temperature: –10 °C to +50 °C (standard operation)
• Dimensions (H×W×D): 173 × 73 × 149 mm
• Weight (approx.): ~1.3 kg
• Application Category: AC Motor speed control, torque regulation, pump & fan control, conveyor drives, general motor load management

Applications

The 6SE6440-2UD21-5AA1 is well suited for industrial applications requiring adjustable motor speed and smooth torque control. Typical uses include pump and fan control, conveyor systems, mixers, HVAC systems, small machinery drives, and other three-phase motor applications where energy efficiency, soft start/stop, and motor protection are needed. Its compact design makes it suitable for control-panel integration in cabineted or tight-space installations.