The VW3AE0503 is an enclosure heater from Schneider Electric's Altivar accessory range, designed for Altivar floor-standing enclosures with separate air flows or the compact version — specifically the Altivar 71 Plus, Altivar 61 Plus, Altivar 71 Plus-LH, and Altivar 61 Plus-LH drive families. Its job is to prevent condensation inside the enclosure by maintaining a temperature above the dew point, which is critical in humid or cold environments where a drive cabinet sits unpowered for extended periods.
This heater mounts inside the Altivar floor-standing enclosure and connects to the cabinet's auxiliary power supply. It is a resistive heating element sized to keep the internal air temperature above the ambient dew point, preventing moisture from forming on drive components, bus bars, and control boards. The intended enclosures are the floor-standing variants with separate air-flow paths or the compact version — not the wall-mount drive packages. If you are retrofitting into an existing cabinet, verify the physical mounting footprint and power draw against the enclosure's auxiliary circuit capacity.
Fit confirmation for the BOM line
If your BOM references one of these drive series and calls out this heater order code, the fit is confirmed. For any other Altivar series or third-party drive cabinet, the physical and electrical compatibility would need to be checked against the enclosure's dimensions and heater mounting provisions.