Product Description:

The HNF01.2D-F240-E0202-A-480-NNNN is a passive mains filter manufactured by Bosch Rexroth Indramat for the HNF Mains Filters series. Installed upstream of multi-axis drive controllers, the unit suppresses conducted emissions on the three-phase supply so that adjacent automation equipment and the public grid remain within electromagnetic compatibility limits. By attenuating high-frequency noise, the filter reduces line-borne disturbances during coordinated motion sequences and helps keep sensitive control electronics stable. Because it is a passive device, it performs this function without adding its own switching activity to the supply path. Placing it on the mains side also helps prevent drive-generated interference from spreading through shared cabinet wiring and facility feeders.

This model handles a nominal line current of 202 A, allowing it to serve clustered drives without additional parallel filtering. Its input terminals accept a supply of 3 × AC 400–480 V, while the filter core is tuned for the industrial power frequency of 50/60 Hz. Compliance with the EMC limit class C2 under DIN EN 61800-3 means the device keeps emissions low enough for installations in commercial and light-industrial environments. The application rating covers up to 6 axes / 240 m of combined motor cable, so the filter can support a long cabinet lineup fed from one incoming section. This arrangement is useful when several connected drives operate at the same time and their switching noise would otherwise accumulate on the supply.

The housing carries a protection rating of IP20, indicating that only basic finger protection is provided and the filter must be mounted inside a closed cabinet. The unit uses Design Version 2, and it is part of Series 01 within the HNF family. The supply designation For feeding devices only confirms that this filter is intended exclusively for the AC mains side of converter systems, not for motor-side smoothing or regeneration paths. In practice, that placement keeps the filter aligned with its line-conditioning role and separates it from components that handle motor output waveforms or returned braking energy.