SIEMENS 6SE6440-2AD31-5DA1 MICROMASTER 440 Frequency Inverter Product Description

Overview

SIEMENS 6SE6440-2AD31-5DA1 belongs to the MICROMASTER 440 series variable frequency drive, equipped with built-in Class A EMC filter. This SIEMENS 6SE6440-2AD31-5DA1 is rated 15 kW for constant torque loads and 18.5 kW for quadratic torque loads, 3-phase 380–480 V AC input. It delivers high-performance vector speed control for AC motors and is widely adopted in pump, fan, conveyor and compressor control loops for new cabinet build, retrofit and spare‑part replacement of MICROMASTER 440 drive systems.

Features

SIEMENS 6SE6440-2AD31-5DA1 adopts sensorless vector control, V/F control and FCC flux current control modes, supporting low-speed high torque output. This SIEMENS 6SE6440-2AD31-5DA1 integrates built-in Class A EMC filter to suppress conducted harmonic interference and meet EMC requirements without extra external filter. 6SE6440-2AD31-5DA1 provides rich I/O terminals: digital input, relay output, analog input and analog output, supporting Modbus RTU communication. It features multiple protection functions including overcurrent, overvoltage, undervoltage, motor overload, drive overheat, phase loss and stall prevention. It supports BOP/AOP operator panel for local parameter setting, monitoring and manual operation. The drive supports multi-step speed, PID closed-loop, automatic restart and flying restart functions. It complies with IEC 61800, CE and UL certifications and is end-of-sale, maintained as a spare part.

Specs

• Brand: SIEMENS

• Series: MICROMASTER 440

• Model: 6SE6440-2AD31-5DA1

• Rated voltage: 3 AC 380–480 V, +10/-10 %, 47–63 Hz

• Power rating: 15 kW (constant torque), 18.5 kW (quadratic torque)

• Overload capability: 150% for 60 s, 200% for 3 s

• Built-in option: Class A EMC filter

• Protection class: IP20

• Ambient temperature: -10 °C ~ +50 °C

• Communication: Modbus RTU onboard

• Operation panel: Compatible BOP / AOP

• Mounting: Cabinet backplate mount

• Standard: IEC 61800, CE, UL

• Lifecycle: Discontinued, spare part only

Principle

SIEMENS 6SE6440-2AD31-5DA1 converts fixed-frequency three-phase AC power into adjustable-frequency and adjustable-voltage AC power via IGBT PWM modulation. The built-in control unit calculates motor flux and torque according to the selected control mode, adjusting output frequency and voltage to regulate motor speed. The integrated Class A filter attenuates high-frequency interference generated by the rectifier and PWM switching. Real-time current and voltage sampling enables fast fault detection and protection action. Status and fault signals are sent to the control circuit and PLC via relay contacts or Modbus RTU.

Applications

SIEMENS 6SE6440-2AD31-5DA1 is deployed on water supply pumps, wastewater pumps, ventilation fans, blowers, belt conveyors and screw compressors. This SIEMENS 6SE6440-2AD31-5DA1 inverter is suitable for flow regulation and energy saving of quadratic torque loads and constant-torque transmission equipment. 6SE6440-2AD31-5DA1 fits drive cabinet overhaul and spare replacement of MICROMASTER 440 series 15 kW inverters with built-in Class A filter.

Installation & Maintenance Notes

Follow official SIEMENS MICROMASTER 440 manual during installation of SIEMENS 6SE6440-2AD31-5DA1. Confirm the wiring of power cable, motor cable and shielding grounding for EMC performance. Back up parameter settings before replacement. After replacement, verify motor nameplate matching, acceleration/deceleration ramps, PID loop and Modbus communication address. Confirm exact part number 6SE6440-2AD31-5DA1; 2UD version has no built-in filter and cannot be substituted directly.