KDA 3.3-150-3-A0I-W1 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.
MPN: R911263056
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.
Internal Product Review
The KDA 3.3-150-3-A0I-W1 spindle drive from Bosch Rexroth Indramat features a forced cooling system with a mounted heatsink blower powered by a 220V AC source, ensuring stable thermal management during intensive operation. With a rated current of 150 A and a DC supply voltage of 300 VDC, this drive is well-suited for demanding spindle applications. The inclusion of an incremental encoder output adds flexibility for precise speed feedback, making it a strong choice for high-performance machine tool setups.
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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.
