KNK03.1A-NR-B0012-P-U226-A4-NNNN Bosch Rexroth Indramat
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MPN: R911344500
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The Bosch Rexroth Indramat KNK03.1A-NR-B0012-P-U226-A4-NNNN is a mains filter with an integrated mains choke, belonging to the KNK Mains Filters series. It features a nominal current of 12 Amps and is designed for 3-phase AC mains voltages from 380 V to 500 V, with IP65 protection. The filter uses a thermal interface for cold plate mounting and achieves EMC Category C3 compliance according to DIN 61800-3.
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Product Description:
The KNK03.1A-NR-B0012-P-U226-A4-NNNN is a line filter with an integrated line choke manufactured by Bosch Rexroth Indramat for the KNK line filter series. Installed between three-phase regenerative drives and the facility power supply, the unit attenuates conducted emissions, limits inrush current, and shapes line current so the connected inverter operates within the intended harmonic range. In industrial automation cabinets, it serves as a passive front-end element that protects upstream switchgear while helping drives return recovered energy to the grid.
The filter is rated for a continuous line current of 12 A, allowing it to support small to mid-range servo inverters without saturation. Its permissible input spans 3x AC 380 V -10% to 3x AC 500 V +10%, so one unit can cover common 400 V and 480 V plant voltages. Internal construction yields a leakage capacitance of 226 nF, which shunts high-frequency noise to the protective conductor without raising touch current beyond safety limits. Electromagnetic compatibility is classified as Category C3 via DIN 61800-3, which is intended for industrial environments with dedicated transformer feeds rather than public low-voltage networks. Heat is removed through a thermal interface (cold plate mounting), so the housing must be fastened to a cooled panel to keep the choke windings within their insulation limits during regenerative operation.
Within the KNK product line, this model is identified as Series 3. The mechanical layout follows the established mounting pattern used for this series. The enclosure carries an ingress rating of IP65, allowing installation on machine exteriors where sprayed coolant or dust is present. The functional scope is listed as Standard Application, indicating that no special harmonic filters are required for standard installation. Because the device is approved for supply systems that contain regenerative devices only, it should not be placed ahead of non-inverting loads that could experience reverse energy flow.
Frequently Asked Questions about KNK03.1A-NR-B0012-P-U226-A4-NNNN:
Q: Which type of supply system can the KNK03.1A-NR-B0012-P-U226-A4-NNNN mains filter be used with?
A: The KNK03.1A-NR-B0012-P-U226-A4-NNNN filter is designed for use with regenerative devices only in supply systems.
Q: What is the nominal current rating for the KNK03.1A-NR-B0012-P-U226-A4-NNNN mains filter?
A: This model operates at a nominal current of 12 amps, suitable for moderate power draws in industrial applications.
Q: How is the KNK03.1A-NR-B0012-P-U226-A4-NNNN mains filter cooled during operation?
A: The cooling method for this filter is thermal interface, requiring cold plate mounting for proper heat dissipation.
Q: What level of environmental protection does the KNK03.1A-NR-B0012-P-U226-A4-NNNN provide?
A: This product is protected to IP65 standards, making it resistant to dust and low-pressure water jets from any direction.
Q: What mains connection voltage range is supported by the KNK03.1A-NR-B0012-P-U226-A4-NNNN filter?
A: The KNK03.1A-NR-B0012-P-U226-A4-NNNN filter supports a mains connection voltage range from 3×AC 380 V -10% to 3×AC 500 V +10%.
