Braking resistor for Altivar drives — 14 Ohm, 22.4 kW
The VW3A7804 is a Schneider Electric braking resistor from the Altivar range, rated at 14 Ohm with 22.4 kW average power at 122 °F (50 °C). It dissipates regenerative energy from a decelerating motor load, preventing DC-bus overvoltage trips on the drive. This resistor uses an M10 bar wire connection for the power circuit and carries an IP23 degree of protection — suitable for indoor installation where dripping water is not a concern, but not for washdown environments.
Lifecycle and sourcing — obsolete, sourced to order
Schneider Electric has marked the VW3A7804 as obsolete. For a line-down replacement or project build, this part is sourced through independent distribution channels.
Physical fit and environmental limits
Dimensions are 21.3 in (540 mm) deep, 39.0 in (990 mm) wide, and 17.3 in (440 mm) tall — verify the enclosure or panel cut-out accommodates this footprint before specifying. Operating ambient temperature range is 32...122 °F (0...50 °C); storage range is -13...167 °F (-25...75 °C). The resistor includes thermal protection via an integrated thermal overload relay.