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Three-Phase + Neutral Line Filters

 

Three-phase and neutral line EMC/EMI filters are a compact solution for the interference suppression on the mains input of cabinets and control units of equipment, ranging from industrial applications like machine tools to sensitive medical installations. These typically involve separate and often insufficiently filtered frequency inverters and SMPS, causing current imbalance and significant interference problems. As individual elements they may be interference-suppressed already. The conjunction of several switching components in the same cabinet and a non-EMC conscious cabling will rise the demand for an additional EMC/EMI filter on the mains input of the whole installation. Many times this is the only way to get the CE mark for the cabinet in accordance with the EMC directive.

For downloading the specific technical documentation, please click on the PDF icon ().

 

Downloads

Product Overview: Three-Phase and Neutral Line Filters


EMC/EMI Glossary

EMC/EMI Glossary


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FN 256 Compact general purpose three-phase and neutral line EMC/EMI filter

FN 256 Compact general purpose three-phase and neutral line EMC/EMI filter
  • Three-phase and neutral line filter for general purpose four-wire filtering
  • Compact space-saving design
  • Choice of connection style
  • Low operating leakage current
Data sheet (687 KB)

 
Rated currents: 8 to 160A
Voltage: ≤480VAC
Frequency: dc to 60Hz
Leakage current: 3.4 to 6.8mA
Attenuation perf.:   high

FN 354 Compact three-phase and neutral line EMC/EMI filter for high frequency attenuation

FN 354 Compact three-phase and neutral line EMC/EMI filter for high frequency attenuation
  • Compact four-wire filter for applications with limited space
  • High attenuation performance up to 300MHz
  • Equally suitable for star and delta power networks
Data sheet (390 KB)

 
Rated currents: 4 to 25A
Voltage: ≤440VAC
Frequency: dc to 60Hz
Leakage current: 0.175 to 0.5mA
Attenuation perf.:   high

FN 355 Ultra-compact three-phase and neutral line EMC/EMI filter with very low leakage current

FN 355 Ultra-compact three-phase and neutral line EMC/EMI filter with very low leakage current
  • Ultra-compact four-wire filter for applications lacking space
  • Exceptional low operating leakage current
  • Equally suitable for star and delta power networks
Data sheet (346 KB)

 
Rated currents: 3 to 20A
Voltage: ≤440VAC
Frequency: dc to 400Hz
Leakage current: 0.07 to 0.29mA
Attenuation perf.:   standard

FN 356 General purpose three-phase and neutral line EMC/EMI filter

FN 356 General purpose three-phase and neutral line EMC/EMI filter
  • Three-phase and neutral line filter for general four-wire filtering tasks
  • Choice of connection style
  • Low operating leakage current
  • Compliant with IEC 60950
  • Suitable to meet EN 55011/14/22
Data sheet (617 KB)

 
Rated current: 16 to 150A
Voltage: ≤440VAC
Frequency: dc to 60Hz
Leakage current: 0.43 to 8mA
Attenuation perf.:   high

(Up to 100A)

FN 3256 Compact three-phase and neutral line EMC/EMI filter for industrial machinery/equipment

FN 3256 Compact three-phase and neutral line EMC/EMI 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
Data sheet (332 KB)

 
Rated currents: 8 to 160A
Voltage: ≤520VAC
Frequency: dc to 60Hz
Leakage current: <1mA
Attenuation perf.:   high

FN 3280 High-end three-phase and neutral line EMC/EMI filter for industrial machinery/equipment

FN 3280 High-end three-phase and neutral line EMC/EMI filter for industrial machinery/equipment
  • Compact, space-saving design, optimized for industrial machinery
  • Combines exceptional attenuation with low leakage current
  • Suitable for machines in mixed/domestic environments (Class A/B)
  • Increases also the immunity if operated directly on the mains input
Data sheet (525 KB)

 
Rated currents: 8 to 600A
Voltage: ≤520VAC
Frequency: dc to 60Hz
Leakage current: <1mA
Attenuation perf.:   very high