KDA 3.3-150-3-A0I-W1 Bosch Rexroth Indramat
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MPN: R911263056
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The Bosch Rexroth Indramat KDA 3.3-150-3-A0I-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and operates with a 300 VDC supply voltage. The drive uses a forced cooling system with a mounted heatsink blower and supports incremental encoder output interfaces.
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Product Description:
The Bosch Rexroth Indramat KDA 3.3-150-3-A0I-W1 is a spindle drive from the KDA Spindle Drives series designed to regulate high-speed machining spindles in automated production cells. It converts regulated DC bus energy into variable-frequency output that governs spindle velocity and torque, while its internal control circuits accept speed reference signals from the machine controller. Its control stage is intended for applications that require stable spindle speed and repeatable torque response during changing process loads. The device belongs to series level 3.
Electrical ratings determine how the unit is integrated with the common DC bus. The intermediate circuit operates at 300 VDC, and the power section can deliver a continuous motor current of 150 A, allowing direct coupling to large high-inertia spindles without external step-up gearboxes and supporting sustained cutting duty. Thermal management is handled by a heatsink-mounted blower that expels heat generated by switching losses, and this assembly uses forced cooling to support prolonged full-load operation. The drive maintains specified performance when the ambient air stays within 5 to 45 °C, allowing installation in most enclosed machine cabinets that remain within that temperature range.
For auxiliary cooling power, the heatsink blower is fed from a 220 V 50-60 Hz single-phase supply, so the fan circuit is isolated from the internal DC bus and wiring remains straightforward. Installation is permitted up to 1000 m above sea level; beyond that height, derating is required because reduced air density lowers cooling efficiency around the fins. Communication with the CNC controller remains straightforward because the front panel provides an incremental encoder output, while the hardware omits a second encoder input to keep cabinet space and wiring demand low. Speed reference information reaches the drive as an analog command voltage, so existing process controllers that generate proportional speed signals can interface without digital fieldbus conversions.
Frequently Asked Questions about KDA 3.3-150-3-A0I-W1:
Q: What is the rated current of the KDA 3.3-150-3-A0I-W1 spindle drive?
A: The KDA 3.3-150-3-A0I-W1 has a rated current of 150 A.
Q: How is the KDA 3.3-150-3-A0I-W1 cooled during operation?
A: This drive uses a mounted heatsink blower for forced cooling.
Q: What ambient temperature range is supported by the KDA 3.3-150-3-A0I-W1?
A: The recommended ambient temperature range for this spindle drive is 5 to 45 degrees Celsius.
Q: What is the required DC supply voltage for the KDA 3.3-150-3-A0I-W1?
A: The KDA 3.3-150-3-A0I-W1 operates with a DC supply voltage of 300 VDC.
Q: What is the highest installation elevation recommended for the KDA 3.3-150-3-A0I-W1?
A: The maximum installation elevation for this model is 1000 meters above sea level.
