KDA 2.1-150-3-AQ0-U1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 2.1-150-3-AQ0-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and a DC supply voltage of 300 Volts. It uses a mounted heatsink blower for forced cooling and operates in ambient temperatures from 5 to 45 degrees Celsius. The drive accepts an analog speed command value and is designed for installations up to 1000 meters above sea level.
Internal Product Review
The KDA 2.1-150-3-AQ0-U1 spindle drive from Bosch Rexroth Indramat offers a rated current of 150 A and operates on a 300 VDC supply, delivering strong performance in demanding spindle applications. Forced cooling with a mounted heatsink blower ensures efficient temperature management, supporting operation in ambient temperatures from 5 to 45 degrees Celsius. This drive is a solid choice for high-power machining environments requiring stable and consistent spindle control.
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Product Description:
Bosch Rexroth Indramat's KDA 2.1-150-3-AQ0-U1 belongs to the KDA Spindle Drives series and is supplied as a dedicated spindle drive for CNC and machining centers. Within an automation rack, it converts a fixed DC bus into three-phase motor power while responding to an external analog speed command. By regulating spindle speed and direction, it forms the link between a motion controller and the high-speed cutting motor, ensuring stable torque delivery during milling, drilling, or grinding tasks.
The drive draws a continuous output of 150 A from a regulated DC bus rated at 300 VDC. Its internal heat sink blower is powered from a separate 115 V/50-60 Hz AC source, so thermal management is independent of the main power stage. The electronics, power transistors, and motor feedback circuits are designed to function across an ambient window of 5 to 45 °C, allowing cabinet placement on most factory floors without auxiliary conditioning. Spindle velocity is commanded through a single-ended analog reference that the control card converts into a sinusoidal output pattern. Operation remains electrically and thermally stable up to the rated current because the forced-air path removes switching and copper losses before they accumulate.
Mechanical installation can be performed at sites situated as high as 1000 m above sea level without derating, which matches typical plant elevations. The aluminum heat sink is paired with a mounted heat sink blower; when the fan starts, it pulls air laterally through the fins in a forced cooling configuration, maintaining device temperature even during long machining cycles. This second-generation hardware carries a streamlined signal board that includes drive-enable and fault-relay contacts, yet it provides no additional interface option for fieldbus expansion, simplifying wiring and reducing cabinet depth for retrofit projects.
