Schneider Electric ATV21HU40M3X Variable Speed Drive

Schneider Electric ATV21HU40M3X is a 4 kW (5 HP) Altivar 21 variable-speed drive designed for three-phase induction motors, with a 208/240 VAC input and three-phase output, packaged in an open IP20 enclosure. As part of the ATV21 family, it is rated for 16.7 A continuous current and uses frame size 2A, with maximum output voltage equal to input. The unit weighs 6.21 lb (2.82 kg) and offers embedded Modbus communication for straightforward PLC integration; EMC filtering is optional and sold separately. This model is discontinued, with commercialization end date of December 31, 2012 and end‑of‑service date of December 31, 2020.