Product Description:

The HNF01.1A-M900-E0125-A-480-NNNN is a three-phase mains filter produced by Bosch Rexroth Indramat for the HNF Mains Filters series. The unit is installed ahead of drive controllers to limit conducted emissions, suppress high-frequency noise, and smooth the current drawn by inverters. Within an automation cell, it helps keep the plant supply within limits required by grid operators and prevents mutual interference between axes. By providing this conditioning function, the filter supports predictable motor behavior and reduces stress on upstream protective equipment.

Its housing carries a degree of protection of IP20, which means objects larger than 12.5 mm cannot reach live parts and that the device is not sealed against moisture. The input terminals accept 3 × AC 400 to 480 V with a tolerance of -15 to +10%, and a line frequency of 50/60 Hz lets the same hardware operate on either European or North American grids. Electromagnetic emission is limited to category C3 in accordance with DIN EN 61800-3, so the filter is intended for industrial environments rather than public mains. Bosch Rexroth Indramat classifies this hardware as design version 1, which sets its mechanical layout and busbar arrangement. Finally, the documentation states that the conditioned supply network is intended only for feeding devices, so the filter must not serve general-purpose loads.

For axis-rich installations, the filter supports power distribution to up to 15 axes from a single cabinet, and it maintains rated attenuation even when the combined length of motor cables reaches 900 m. These application limits correspond to series identifier 01, which matches current IndraDrive converters and cabinet layouts. Observing these axis and cable boundaries keeps leakage currents within allowed values and helps keep the voltage drop across the filter predictable during dynamic motion profiles.