Product Description


HFD 356 Series

Radio Interference Suppression Filter

Three-phase, low leakage current, 3 x 480 Vac, 3 x 3 - 3 x 16 A, leakage current 0.50 mA, for general requirements


  • Increase in the interference immunity of the connected consumer

  • Low leakage current

  • For general EMI suppression

  • Single-stage filter concept

  • Efficient filter effect against line-bound interference emissions


EMI Filters

Passive EMI filters from BLOCK are used to suppress the electromagnetic interference between the network and frequency inverter in the frequency range between 150 kHz and 30 MHz. They ensure compliance with the limit values required under residential and industrial standards. In the line filter design, the passive EMI filter can also be combined with a line reactor, which also reduces low-frequency interference (harmonics).

  • Attenuation of radio interference voltages >=150 kHz
  • Compliance with the limit values required under residential and industrial standards
  • Flawless operation of 30 mA/300 mA ground fault circuit breakers through the use of low-leakage current filter solutions
  • Increased interference immunity for the system


Radio interference suppression filter for mains-side interference suppression of power supplies and electronic devices.


Rated Voltage

3 x 480 Vac

Degree of Protection

IP 20

Leakage Current

0.50 mA

Rated Current

3 x 3 - 3 x 16 A

Voltage Range

0 - 480 Vac

Ambient Temperature

max. 45 °C


DIN Rail mounting


DIN EN 60939-2

Specifications vary between configurations. Refer to the Configurations below for more information and links to the manufacturer's website.



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