3-Phase Filters with Neutral FN354

Compact Three-phase and Neutral Line Filter for High Frequency Attenuation


Compact Three-phase and Neutral Line Filter for High Frequency Attenuation

  • Compact four-wire filter for applications with limited space
  • High attenuation performance up to 300 MHz
  • Equally suitable for star and delta power networks

Features and Benefits

The FN 354 family of filters is intended primarily for applications that require extremely effective interference suppression across a broad frequency spectrum.
Advanced two-stage filter circuits with highly saturating resistant toroidal inductors, in conjunction with feedthrough capacitors on each of the three phases and the neutral line, ensure that these filters provide very high attenuation in the upper frequency band.
FN 354 are equally suitable for the operation on star and delta power networks. 

Typical Applications

Applications requiring high-frequency attenuation
Power supplies
Medical equipment
Office and data processing equipment

Technical Specifications

Maximum continuous operating voltage

3x 440/250 VAC

Operating frequency

DC to 60 Hz

Rated currents

4 to 25 A @ 40°C max

High potential test voltage

P/N –> E 2000 VAC for 2 sec

P –> P 1900 VDC for 2 sec

P -> N 1100 VDC for 2 sec

Protection category

IP 20 (version with -47 connections)

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)

Flammability corresponding to

UL 94 V-2 or better

Design corresponding to

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

MTBF @ 40°C/230 V (Mil-HB-217F)

500,000 hours

Typical electrical schematic


Approvals & Compliances

RoHS Label
CSA Label
CE Label
UKCA Label