KDA 3.3-150-3-A00-U1 Bosch Rexroth Indramat
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MPN: R911265550
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The Bosch Rexroth Indramat KDA 3.3-150-3-A00-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. This drive uses a mounted heatsink blower for forced cooling and operates within an ambient temperature range of 5 to 45 degrees Celsius.
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Product Description:
The Bosch Rexroth Indramat KDA 3.3-150-3-A00-U1 belongs to the KDA Spindle Drives series. It is a closed-loop spindle drive that supplies regulated power to high-speed machine-tool spindles in automated production cells. The unit converts energy from a common DC bus into three-phase motor output, and its integrated heat sink blower removes internal heat. Closed-loop regulation helps the drive respond to feedback changes during load shifts, which is important for maintaining spindle speed during drilling, milling, or grinding operations. When paired with compatible motion controllers, it provides the torque and speed accuracy required for precision spindle applications.
The drive operates from a stabilized DC link of 300 VDC, which is routed from the common supply module in the cabinet. Under continuous load, the power stage can deliver 150 A of output current, permitting direct connection to medium-frame induction or synchronous spindle motors. Thermal energy from the switching transistors is removed by a mounted heat sink blower, and that fan is powered by an auxiliary supply of 115 V/50–60 Hz through the front service connector. Because airflow is directed across the fins, the module uses forced cooling to keep the internal temperature within its operating limit during rapid acceleration and deceleration cycles. This cooling method supports stable operation in applications where spindle demand changes quickly over short time intervals.
The converter is intended for ambient air from 5 to 45 °C and for installation up to 1000 m above sea level without derating. Its control board interprets an analog reference voltage for velocity demand, which allows straightforward connection to legacy CNC controllers that generate ±10 V signals. This variant is identified as Series 3. It does not include optional communication daughterboards, and a second encoder input is not provided, so only the primary spindle encoder is processed. That arrangement suits systems that use a single feedback channel and a simple analog command interface.
Frequently Asked Questions about KDA 3.3-150-3-A00-U1:
Q: What type of cooling method does the KDA 3.3-150-3-A00-U1 spindle drive use?
A: The KDA 3.3-150-3-A00-U1 uses a mounted heatsink blower for forced cooling, which helps maintain optimal operating temperature.
Q: What is the rated current capacity of the KDA 3.3-150-3-A00-U1 spindle drive?
A: This model operates with a rated current of 150 A for high-performance spindle drive applications.
Q: What type of speed command input does the KDA 3.3-150-3-A00-U1 accept?
A: The KDA 3.3-150-3-A00-U1 supports an analogue speed command input value.
Q: What is the operational temperature range for the KDA 3.3-150-3-A00-U1?
A: This spindle drive is designed to operate within an ambient temperature range of 5 to 45 degrees Celsius.
Q: What is the maximum installation elevation for the KDA 3.3-150-3-A00-U1 spindle drive?
A: The KDA 3.3-150-3-A00-U1 is suitable for installation up to 1000 meters above sea level.
