DATASHEET 3-Phase + Neutral Line Filters FN 354
Compact Three-phase and Neutral Line Filter for High Frequency Attenuation
Compact four-wire filter for applications with Approvals
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
Technical specifications Power supplies
Medical equipment
Maximum continuous operating voltage 3x 440/250 VAC Office and data processing equipment
Operating frequency dc to 60 Hz
Rated currents 4 to 25 A @ 40 C
Typical electrical schematic
High potential test voltage P > E 2000 VAC for 2 sec
P > P 1900 VDC for 2 sec
Protection category IP20 (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 @ 40C/230V (Mil-HB-217F) 500,000 hours2
EMC/EMI Products Schaffner Group Datasheets 2014
Filter selection table
Filter Rated current Leakage current* Power loss Input/Output Weight
@ 40 C (25 C) Power loss @ 25 C/50 Hz connections
[A] [mA] [W] [kg]
FN 354-4-05 4 (4.5) 0.175 2.0 -05 0.23
FN 354-6-05 6 (6.7) 0.175 3.9 -05 0.38
FN 354-12-05 12 (13.4) 0.175 7.8 -05 1.1
FN 354-15-47 15 (16.8) 0.5 10.8 -47 4.7
FN 354-25-47 25 (28) 0.5 16.9 -47 4.7
* Maximum leakage under normal operating conditions, based on the assumption that all three phases and the neutral conductor are connected to the supply and the
consumer. In this case, the current will mainly return through the neutral line, not as earth leakage.
Typical filter attenuation
Per CISPR 17; A = 50 /50 sym; B = 50 /50 asym; C = 0.1 /100 sym; D = 100 /0.1 sym
4 and 6 A types 12 A types 15 A types 25 A types