The VW3AE0644 is a sinus filter from the Altivar 71 Plus and Altivar 61 Plus range, designed for floor-standing enclosures with separate air flows or the compact version. It sits in the protection accessories category and cleans the drive output waveform to reduce motor bearing currents and cable reflections on longer runs.
What It Does in the Drive System
A sinus filter sits between the drive output and the motor. It converts the PWM voltage pulses into a near-sinusoidal waveform, which drops the voltage peak at the motor terminals and reduces dV/dt stress on winding insulation. For an Altivar 71 Plus or 61 Plus in a floor-standing cabinet with separated airflow, this filter is the intended bolt-on for motor protection on long cable runs or with older motor windings.
This filter is sized for the Altivar floor-standing enclosure variant with separate air flows — not the standard IP20 wall-mount drive. If your cabinet uses the compact version of that same enclosure family, it also fits. Verify the mechanical footprint against your enclosure's gland plate and cable entry before committing the BOM line.