Product Description:

The KDA 3.3-100-2-A00-W1 is a drive module developed by Bosch Rexroth Indramat for the KDA Spindle Drives series. It forms the power stage between a CNC controller and a high-speed spindle motor. The unit translates command signals into regulated current and provides integrated thermal management for continuous machining or grinding tasks in industrial automation. It is intended for spindle applications that require repeatable speed control during long operating periods. The integrated power stage also reduces the need for separate external conversion hardware between the control and motor.

The heat sink blower runs from a single-phase supply of 220 V, 50–60 Hz, so the drive can cool itself without drawing power from the DC link. Airflow is delivered by a mounted heat sink blower that pushes air directly across the internal dissipators; this arrangement supports the unit’s forced cooling mode and helps keep semiconductor temperatures within an acceptable range. Continuous output to the spindle is possible because the power section is rated for 100 A, while an analog speed command input supports connection to older control hardware that uses voltage-based references. Safe operation is permitted over an ambient range of 5 to 45 °C, which suits typical machine enclosures and production floors.

Installation height can reach 1000 m above sea level without adjustment, allowing placement in elevated facilities where air density is lower. The controller belongs to series 3, indicating its product generation within the KDA family. System integration is direct because there is no additional interface option; all required signals are presented on the fixed terminal set, and a second encoder path is omitted. Because the interface set is fixed, external expansion cards are not part of the connection scheme for this unit. The fixed connection layout keeps wiring straightforward for standard spindle-control installations.