KDA 2.1-150-300-A00-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-300-A00-U1 is part of the KDA Spindle Drives series and is a spindle drive with a rated current of 150 Amps. It operates on a 300 VDC supply voltage and uses forced cooling. The drive is designed for ambient temperatures from 5 to 45 degrees Celsius and can be installed up to 1000 meters above sea level.
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Product Description:
The KDA 2.1-150-300-A00-U1 is a spindle drive module developed by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. Designed for CNC machining centers, the unit acts as a power stage for rotating spindle motors, shaping DC-link energy into a regulated three-phase output that follows velocity and torque commands from a higher-level controller. This arrangement lets the controller adjust spindle speed smoothly during tool entry, heavy cuts, and deceleration at the end of a cycle. Because it serves as the power stage, it supports stable torque delivery during both continuous machining and short acceleration events. By placing the drive close to the motor circuit, the system can reduce wiring losses and improve acceleration for drilling, milling, and grinding axes.
The drive delivers a continuous current of 150 A, providing headroom for heavy cutting loads and rapid tool changes. Its DC link operates at 300 VDC, so bus bars and protective devices must match that potential. Thermal management relies on forced cooling, and an axial fan moves cabinet air over the heat sink to help keep junction temperatures within limits. This airflow removes heat from the power semiconductors and supports stable output during long machining cycles. Operation is permitted at ambient temperatures from 5 °C to 45 °C. Vent paths must stay clear because stagnant air can quickly raise internal temperature.
Full ratings remain available up to 1000 m above sea level, and operation above that elevation requires derating. Reduced cooling efficiency at higher elevations lowers the amount of heat that can be carried away from the heat sink. The unit is Series 2, and this revision adds higher gate-drive immunity together with expanded fault memory. Stored fault history helps isolate shutdown causes after overload or cooling-related trips. It also uses common LEDs, parameter telegrams, and mounting geometry with related modules, which helps keep cabinet layout consistent when the drive is installed beside matching supply units.
Frequently Asked Questions about KDA 2.1-150-300-A00-U1:
Q: What is the allowable ambient temperature range for the KDA 2.1-150-300-A00-U1 spindle drive?
A: The KDA 2.1-150-300-A00-U1 is designed to operate in ambient temperatures between 5 and 45 degrees Celsius.
Q: How is the KDA 2.1-150-300-A00-U1 spindle drive cooled?
A: Forced cooling is used to maintain optimal operating temperature for this drive.
Q: What is the required DC supply voltage for the KDA 2.1-150-300-A00-U1?
A: This spindle drive operates with a DC supply voltage of 300 VDC.
Q: What is the maximum installation elevation for the KDA 2.1-150-300-A00-U1 spindle drive?
A: Installation is supported at elevations up to 1000 meters above sea level.
Q: What is the rated current capability of the KDA 2.1-150-300-A00-U1?
A: The KDA 2.1-150-300-A00-U1 has a rated current of 150 A for regular operation.
