DATASHEET 3-Phase + Neutral Line Filters FN 356
General Purpose EMC/EMI Line Filter
Three-phase and neutral line filter for general Approvals
four-wire filtering tasks
Choice of connection style
Low operating leakage current
Compliant with IEC 60950
(FN 356 up to 100 A)
Suitable to meet EN 55011/14/22
Features and benefits
FN 356 represents the industry standard filter
solutions for EMC compliance on three-phases and
the neutral conductor, providing high attenuation
of both symmetrical and asymmetrical interference
Choice of connection style is offered for an
application-specific filter selection
Solid touch-safe terminal blocks (-29, -33, -34
versions) offer a generous contacting cross section
and contribute to overall safety (IP20)
Used as a mains input filter, FN 356 filters increase
the conducted immunity and thus contribute to
system reliability
Design compliance with IEC 60950 provides
additional application flexibility
Typical applications
General purpose four-wire filtering
Technical specifications
Mainframe computer systems
High power office equipment
Maximum continuous operating voltage 3x 440/250 VAC
UPS
Operating frequency dc to 60 Hz
Rated currents 16 to 150 A @ 40 C Installations comprising automation equipment
High potential test voltage P > E 2000 VAC for 2 sec
P > P 1900 VDC for 2 sec
Typical electrical schematic
Protection category IP20 (filters with connectors -29, -33, -34)
IP00 (filters with connectors -06, -24, -28)
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/400V (Mil-HB-217F) 220,000 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) @ 400 VAC/50 Hz @ 25 C/ 50Hz connections
[A] [mA] [W] [kg]
FN 356-16-.. 16 (18.4) 0.43 7.0 -06 -29 1.2
FN 356-25-.. 25 (28.8) 0.43 10.1 -24 -33 1.5
FN 356-36-.. 36 (41.5) 0.43 10.9 -24 -33 1.6
FN 356-50-.. 50 (57.7) 0.43 15.8 -24 -33 2.3
FN 356-100-.. 100 (115.0) 1.33 24.0 -28 -34 5.9
FN 356-150-28 150 (172.5) 8.00 45.9 -28 8.1
* To compile a complete part number, please replace the -.. with the required I/O connection style.
** 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
16 A types 25 to 50 A types 100 A types 150 A types
Mechanical data
16 to 50 A types (-06, -24) 16 to 50 A types (-29, -33)