Product Description:

The KNK02.1A-NR-B0012-A-U226-A4-NNNN is a line-side conditioning module manufactured by Bosch Rexroth Indramat and supplied within the KNK Mains Filters series. As a mains filter with an integrated mains choke, it is installed between the plant supply and regenerative drive controllers to attenuate conducted disturbances and limit harmonic feedback into the utility grid. In standard automation cabinets, it occupies the same footprint as other KNK components and shares their terminal arrangement for straightforward wiring.

This model is intended for a standard application, so its electrical clearances, dissipation capability, and insulation distances suit ordinary cabinet environments. Compliance with Category C3 under DIN 61800-3 means the filter meets emission limits when it is mounted close to the drive and wired with shielded motor cables. A leakage capacitance of 226 nF diverts common-mode noise from each phase to protective earth while remaining low enough to reduce nuisance residual-current trips. The unit sustains a nominal load of 12 A, so drives drawing up to that current can regenerate energy without saturating the internal choke. Input terminals accept three-phase supplies from 3×AC 380 V to 3×AC 500 V, allowing the same device to serve 380, 400, 460, or 480 V networks within the stated tolerance band.

For mechanical integration, the housing is machined for a Thermal Interface that bolts directly to a cold plate; this mounting path transfers switch and coil heat into the cabinet heat exchanger without relying on forced air. The filter is intended for regenerative devices only, so its impedance curve is matched to bidirectional inverters that return energy to the mains during braking. An IP20 enclosure rating permits finger-safe installation inside closed panels while omitting gaskets that would hinder conduction cooling. Internal build code aligns with Design 1 and Series 2, and the Standard Design suffix shows that no application-specific options are fitted.