3-Phase Filters FN3120

High-Performance EMC/RFI Filter for Drives


High-Performance EMC/RFI Filter for Drives

  • High performance filter for extremely noisy applications
  • Significantly improves the reliability and immunity of installations
  • Enables compliance with Class B limits even with very long cables


Article Rated Current @ambient Leakage current IEC60939 Input/Output connections (Nm) Distribution stock Compare Read More
Input terminal Output terminal
FN3120H-25-33 FN3120H-25-33 2510.533 - STB10 10mm233 - STB10 10mm2
FN3120H-50-53 FN3120H-50-53 5010.553 - STB16 16mm253 - STB16 16mm2
FN3120H-80-35 FN3120H-80-35 8010.535 - STB50 50mm235 - STB50 50mm2
FN3120H-110-35 FN3120H-110-35 11010.535 - STB50 50mm235 - STB50 50mm2
FN3120H-150-40 FN3120H-150-40 15010.540 - STB95 95mm240 - STB95 95mm2
FN3120H-230-40 FN3120H-230-40 23010.540 - STB95 95mm240 - STB95 95mm2

Features and Benefits

High-performance filter for mainly indus- trial motor drive applications with extremely high noise levels, providing sufficient interference suppression to achieve Class B even with very long motor cables (e.g. machine tools with up to 12 axes with ~10 to 20 m cables each)
Broadband attenuation performance and exceptional saturating resistance ensure reliable interference suppression
FN 3120 operated on the mains input of machines or equipment contributes significantly to the reliability and immunity by offering protection against conducted interference phenomena coming from the environment
Solid, touch-safe terminal blocks offer sufficient contacting cross section according to the EN 60204-1 installation standard, which is very common for industrial equipment like machine tools
Compact dimensions and light weight design with good accessibility for automatic and hand tools guarantee a simple time and space-saving installation

Typical Applications

Mainly industrial equipment, machinery and machine tools such as printing machines, packaging machines, extruders, wood working machines, milling and drilling machines, laser cutting machines, welding machines, robotics, conveyors, assembly lines, pumps, oil production, chemical and mining industry, etc. The filters are ideal for most motor drive applications and particularly for regenerative drives with suitable line reactor or LCL filter.

Technical Specifications

Maximum continuous operating voltage

3x520/300 VAC

Nominal operating voltage

480 VAC +10% possible

Rated currents

25 to 230 A @ 50°C

Overload capability

4x rated current at switch on,

1.5x rated current for 1 minute, once per hour

Operating frequency

DC to 60 Hz

High potential test voltage

P –> E 2750 VDC for 2 sec

P –> P 2250 VDC for 2 sec

Temperature range (operation and storage)

-25°C to +100°C (25/100/21)

Protection category

IP 20

Flammability corresponding to

UL 94 V-0

Design corresponding to

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

MTBF (Mil-HB-217F)

>300,000 h @ 50°C/480 V

Typical electrical schematic


Approvals & Compliances

RoHS Label
UL Recognized Label
ENEC 14 Label
CSA Label
UKCA Label