3-Phase Filters with Neutral FN355

Ultra-compact Low Leakage current EMC/EMI Filter


Ultra-compact Low Leakage current EMC/EMI Filter

  • Ultra-compact four-wire filter for applications lacking space
  • Exceptional low operating leakage current
  • Equally suitable for star and delta power networks

Features and Benefits

The FN 355 family of three-phase and neutral line filters provides a cost-effective interference suppression solution for a wide variety of applications
Available in four versions, with current ratings from 3 to 20 A, the filters employ a single-stage four-wire LC circuit with saturating resistant chokes, and have a very low operational leakage current
FN 355 filters are contained within an extremely compact metal housing, making them ideal for use in situations where space is at a premium

Typical Applications

Office equipment
Medical equipment
General purpose four-wire filtering
Applications with tight space conditions

Technical Specifications

Maximum continuous operating voltage

3x440/250 VAC

Nominal operating voltage

400 VAC

Rated currents

3 to 20 A @ 40°C

Overload capability

4x rated current at switch on,

1.5x rated current for 1 minute, once per hour

Operating frequency

DC to 400 Hz

High potential test voltage

P/N –> E 2000 VAC for 2 sec

P –> P 1350 VDC for 2 sec

P -> N 800 VAC for 2 sec

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 (Mil-HB-217F)

>850,000 h @ 40°C/400 V

Typical electrical schematic


Approvals & Compliances

RoHS Label
UL Recognized Label
CSA Label
CE Label
UKCA Label