KDF1.2-050-300-W1-220 Bosch Rexroth Indramat
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MPN: R911225691
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The Bosch Rexroth Indramat KDF1.2-050-300-W1-220 is a variable frequency drive from the KDF Variable Frequency Drives series. It has a rated current of 50 Amps and uses an external fan unit for cooling with an external AC supply for the blower. The drive measures 49.0 cm in length, 39.0 cm in height, and 11.0 cm in width.
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Product Description:
The KDF1.2-050-300-W1-220 variable-frequency drive is part of the KDF Variable Frequency Drives series produced by Bosch Rexroth Indramat. It accepts fixed-frequency mains power and produces a controllable three-phase output so a connected motor can run at the speed required by the process. This function is useful in conveyor sections, mixers, and indexing machines where controlled acceleration and deceleration improve throughput and reduce unnecessary mechanical stress. By adjusting output frequency and voltage together, the unit also supports smoother starts and steadier operation during changing load conditions. In applications with repeated starts and stops, that control helps limit shock loading on couplings, belts, and gear trains.
The housing stands 39.0 cm tall, measures 49.0 cm from front to back, and is 11.0 cm wide, so it fits narrow control cabinets beside PLC and safety hardware. Its power stage is rated for 50 A of continuous output current, which allows operation with medium-frame induction motors without derating. Heat from the power semiconductors is carried through an integrated duct that works with an external fan unit, keeping airflow directed through the drive and helping stabilize internal temperature during sustained load changes. The slim profile also leaves room for wire ducts, breakers, and terminal blocks in dense cabinet layouts. Directed ventilation is especially useful when adjacent cabinet components add heat to the same enclosure volume.
An external blower connects to terminal X13 on the front panel, and its impeller motor is powered from an external AC supply so cooling can remain active during standby or fault conditions. This arrangement separates fan operation from the inverter DC link, which helps remove residual heat after output power is disabled and supports stable thermal behavior during restart intervals. Because the blower circuit is powered independently, fan operation does not depend on motor command status. It also lets the blower keep moving air while the power stage is inactive after a protective trip. The front access point keeps blower wiring in one area, which reduces cable routing complexity and makes routine cleaning of the cooling path easier.
Frequently Asked Questions about KDF1.2-050-300-W1-220:
Q: What is the rated current for the KDF1.2-050-300-W1-220 drive?
A: The KDF1.2-050-300-W1-220 variable frequency drive has a rated current of 50 A, supporting high power applications.
Q: How does the KDF1.2-050-300-W1-220 drive manage cooling?
A: This drive uses an external fan unit as its cooling method to maintain optimal temperature during operation.
Q: Which blower connection is used by the KDF1.2-050-300-W1-220 drive?
A: The blower for this model must be connected via the X13 connector, enabling integration with external ventilation.
Q: What is the blower supply requirement for the KDF1.2-050-300-W1-220 drive?
A: The blower of the KDF1.2-050-300-W1-220 requires an external AC supply, ensuring consistent airflow.
Q: Which series includes the KDF1.2-050-300-W1-220 drive?
A: This product is part of the KDF Variable Frequency Drives series from Bosch Rexroth Indramat.
