KDA 3.1-150-3-A0D-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 3.1-150-3-A0D-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 VDC. It features forced cooling via a mounted heatsink blower powered at 115V, 50-60Hz, and operates in ambient temperatures from 5 to 45 degrees Celsius. The drive supports digital position command values and analog speed command values, and is designed for installation up to 1000 meters above sea level.
Internal Product Review
The KDA 3.1-150-3-A0D-U1 spindle drive from Bosch Rexroth Indramat features a rated current of 150 A and operates with a 300 VDC supply voltage, making it highly effective for demanding spindle applications. Mounted heatsink blower and forced cooling ensure stable thermal management within an ambient temperature range of 5 to 45 degrees Celsius. This model stands out for strong performance and reliable cooling in continuous industrial use.
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Product Description:
The KDA 3.1-150-3-A0D-U1 belongs to the KDA Spindle Drives series from Bosch Rexroth Indramat. In automated machining centers, this unit operates as a dedicated spindle drive, converting DC-bus energy into controlled three-phase output that follows commanded speed and torque profiles. It is built for Series 3 layouts and supports the sustained electrical loading commonly seen in metal-cutting applications. An onboard heatsink blower removes switching losses during continuous duty, helping the drive remain stable during drilling, milling, and other high-speed spindle work. The drive is intended for applications where rapid speed changes and controlled torque are needed to keep tool performance consistent across varying material loads.
The power stage is rated for a continuous output of 150 A, which allows it to drive large spindle motors without reaching current limits too quickly under load. It draws its intermediate circuit from a 300 VDC supply shared with compatible Indramat supply modules. Thermal management relies on a mounted heatsink blower that receives utility power at 115 V, 50/60 Hz and moves air directly across the finned aluminum heat sink. This arrangement is classified as forced cooling. Because the blower uses a separate utility supply, cooling can be maintained without depending on the spindle output stage. The airflow helps control internal temperature during extended machining cycles in which the spindle remains under heavy demand.
Speed control is commanded by an analog reference, and position loops can also use a digital position command value input. The unit does not include a secondary encoder connection, so there is no additional feedback input for redundant sensing. Reliable operation is specified between 5 to 45 °C and at mounting locations up to 1000 m above sea level. Operation outside these limits requires derating. This combination allows the drive to work in systems that use conventional analog speed commands while still accepting higher-level digital positioning input. The operating range is suitable for enclosed electrical cabinets used on standard shop-floor machinery.
