Compact Line Filter for Industrial Machinery/Equipment

3-Phase Filters with Neutral FN3256


Compact Line Filter for Industrial Machinery/Equipment

  • Compact, space-saving design, optimized for industrial machinery
  • Combines high attenuation performance with low leakage current
  • Performance according to the machine tool standard EN 50370-1
  • Increases also the immunity if operated directly on the mains input

Features and Benefits

An extremely compact and light weight filter design with a cubic shape, requiring minimum mounting space and thus taking the constructional conditions on the mains input of machinery into account
Simple and time-saving installation with good accessibility for automatic and hand tools
Solid, touch-safe terminal blocks offering sufficient contacting cross section according to the EN 60204-1 installation standard, which is very common in industrial applications
As a mains input filter for three phases and neutral line, FN 3256 ensures the compliance with the new product family standard for machine tools in mainly industrial environments EN 50370-1. Further, its use will also increase the conducted immunity of the entire installation significantly
FN 3256 provides the attenuation performance to meet the requirements of various machine tools with up to 8 driving axes with ~10 m of motor cable each
For easy selection and application, the filter current ratings are aligned with common fuse values

Typical Applications

Mainly industrial equipment, machinery, machine tools and diverse process auto- mation systems with three-phase and neutral electricity supply. Further, these filters are suitable for power supplies, high-power office equipment and further applications, where efficient interference suppression on three phases and the neutral line is required and where space is critical. Because of the very low leakage current, FN 3256 can even be used for some medical devices.

Technical Specifications

Maximum continuous operating voltage

3x 520/300 VAC (480 VAC +10% possible)

Operating frequency

DC to 60 Hz

Flammability corresponding to

UL 94 V-2 or better

Design corresponding to

UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939

Rated currents

8 to 160 A @ 50°C

High potential test voltage

P/N –> E 2750 VDC for 2 sec

P –> P 2250 VDC for 2 sec

P -> N 1300 VDC for 2 sec

Protection category

IP 20

Overload capability

4x rated current at switch on,

1.5x rated current for 1 minute, once per hour

Temperature range (operation and storage)

-25°C to +100°C (25/100/21)


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    +91-95386 78655 / +91-74832 76147

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    No 9/36,Vaishnavi Sapphire centre, 2nd floor,Room 09,Tumkur road, Yeshwantpur, Bangalore -560022