KDA 3.3-050-3-A00-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.3-050-3-A00-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 50 Amps and a DC supply voltage of 300 VDC. It uses a mounted heatsink blower for forced cooling and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive is designed for a maximum installation elevation of 1000 meters above sea level and receives speed command values in analog format.
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Product Description:
The KDA 3.3-050-3-A00-U1 is a spindle drive module designed by Bosch Rexroth Indramat for the KDA Spindle Drives series. In a CNC machining center, the unit regulates spindle speed and torque by converting direct current from the shared DC bus into a controlled three-phase output for the motor. By matching drive output to load demand, it supports accurate material removal rates, shorter cycle times, and consistent surface finishes during automated machining and other repetitive production tasks. The device occupies one slot in an Indramat power rack and interfaces with supply modules through the shared DC bus, which helps keep the drive layout compact.
It draws its DC link energy from a nominal 300 VDC supply, and its power section is rated for a continuous output current of 50 A to the connected spindle motor. A dedicated blower circuit operating at 115 V/50-60 Hz powers the heat sink fan mounted directly on the drive, so cooling air is provided without a separate external fan assembly. This forced airflow keeps internal component temperatures within an allowable ambient range of 5 to 45 °C during normal operation. The unit can be installed at elevations up to 1000 m above sea level without performance derating, which helps when the machine is placed in facilities above lowland sites.
The drive uses a mounted heat sink blower to channel air along the cooling fins before it exits the cabinet, providing forced cooling for the power section and its heat-generating components. Because the speed reference enters as an analog voltage, the control connection uses shielded pair wiring and a simple gain adjustment rather than protocol mapping. The unit has no additional interface option and omits a second encoder input to suit single-channel feedback arrangements that are common on motorized spindles.
Frequently Asked Questions about KDA 3.3-050-3-A00-U1:
Q: What cooling method is utilized by the KDA 3.3-050-3-A00-U1 spindle drive?
A: The KDA 3.3-050-3-A00-U1 spindle drive uses a mounted heatsink blower for forced cooling.
Q: What is the rated current of the KDA 3.3-050-3-A00-U1?
A: The rated current for this spindle drive is 50 A, supporting high-power spindle applications.
Q: What is the allowable operating temperature range for the KDA 3.3-050-3-A00-U1?
A: This model operates within an ambient temperature range of 5 to 45 degrees Celsius.
Q: What voltage and frequency is required for the heatsink blower AC source on this drive?
A: The KDA 3.3-050-3-A00-U1 receives its heatsink blower AC source at 115V/50-60Hz.
Q: What type of speed command value input does the KDA 3.3-050-3-A00-U1 support?
A: The drive accepts speed command values in analogue format for precise control.
