Features and benefits
Broad range of power ratings for fast
and convenient filter selection.
Available as 440VAC (FN 351) and
520VAC (FN 351H) versions for network-
specific applications.
FN 351 filters provide a broadband
common and differential-mode
attenuation performance, which
remains available also when high
interference levels are present.
Solid, touch-safe filter terminals
contribute to overall equipment safety
and make the filters compliant with IEC
60950.
Introduced as one of the very first
motor drive EMC filters in the market,
FN 351 has been widely imitated and
has success- fully proven its function
over more than 10 years.
Typical applications
Three-phase motor drives
Inverters and converters
Industrial automation equipment
UPS
SMPS
General purpose three-phase filtering
Three-Phase Filters
FN 351
General Purpose EMC Filter for
Three-phase Applications
EMC solution for industrial
inverters and motor drives
Rated currents from 8 to 280A
Selectable voltage level of 440V
and 520V
High differential and common-
mode attenuation
Compliant with IEC 60950
Approvals
(FN 351 up to 110A: UR, CSA, ENEC / FN
351H up to 110A: c-CSA-us, ENEC)
Technical specifications
Maximum continuous operating voltage: 3x 440/250VAC (FN 351)
3x 520/300VAC (FN 351H)
Operating frequency: dc to 60Hz
Rated currents: 8 to 280 A @ 40°C
High potential test voltage: P –> E 2600VDC for 2 sec (FN 351)
P –> P 1900VDC for 2 sec (FN 351)
P –> E 2750VDC for 2 sec (FN 351H)
P –> P 2250VDC for 2 sec (FN 351H)
Protection category: IP20
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 +85°C (25/085/21) (FN 351)
-25°C to +100°C (25/100/21) (FN 351H)
Flammability corresponding to: UL 94V-2 or better
Design corresponding to: UL 1283, CSA 22.2 No. 8 1986, IEC/EN
60939
MTBF @ 40°C/400V (Mil-HB-217F): 135,000 hours
Typical electrical schematic
Three-Phase Filters > FN 351
Filter selection table
Filter* Rated current Typical drive Leakage current*** Power loss Input/Output
connections
Weight
@ 40°C (25°C) power rating** @ 400VAC/50Hz @ 25°C/50Hz
[A] [kW] [mA] [W] [kg]
FN 351-8-29 8 (9.2) 3 1.9 7 -29 0.8
FN 351-16-29 16 (18.5) 5.5 1.9 8 -29 1.3
FN 351-25-33 25 (28.9) 11 28.0 8 -33 1.4
FN 351-36-33 36 (41.6) 15 28.0 9 -33 1.5
FN 351-50-.. 50 (57.7) 22 29.5 11 -33 -34 1.6
FN 351-64-.. 64 (73.9) 30 29.5 15 -33 -34 1.7
FN 351-80-34 80 (92.3) 37 31.8 23 -34 5.6
FN 351-110-35 110 (127) 55 31.8 25 -35 5.8
FN 351-180-36 180 (208) 90 29.6 49 -36 13.0
FN 351-280-37 280 (323) 132 35.7 70 -37 28.0
FN 351H-8-29 8 (9.2) 4 2.3 7 -29 1.1
FN 351H-16-29 16 (18.5) 7.5 2.3 8 -29 1.3
FN 351H-25-33 25 (28.9) 15 32.7 8 -33 1.4
FN 351H-36-33 36 (41.6) 18.5 32.7 9 -33 1.5
FN 351H-50-.. 50 (57.7) 30 32.7 11 -33 -34 1.6
FN 351H-64-33 64 (73.9) 37 32.7 15 -33 1.7
FN 351H-80-34 80 (92.3) 45 38.0 23 -34 5.6
FN 351H-110-35 110 (127) 75 38.0 25 -35 5.8
FN 351H-180-36 180 (208) 110 35.6 49 -36 13.0
FN 351H-280-37 280 (323) 160 42.9 70 -37 28.0
* To compile a complete part number, please replace the -.. with the required I/O c onnec tion style.
** Calc ulated at rated current, 400VAC (FN 351)/480VAC (FN 351H) and c os phi = 0.8. The exact value depends upon the effic iency of the drive, the motor and the entire
application.
*** Maximum leakage under normal operating conditions (FN 351 at 400V, FN 351H at 480V). Note: if two phases are interrupted, worst case leakage c ould reach 6 times
higher levels.
Typical filter attenuation
Per CISPR 17; A = 50Ω/50Ω sym; B = 50Ω/50Ω asym; C = 0.1Ω/100Ω sym; D = 100Ω/0.1Ω sym
8A types 16A types 25A types 36 and 50A types
64A types 80 and 110A types 180A types 280A types
Three-Phase Filters > FN 351
Mechanical data
8 and 16A types 25 to 64A types
80 and 110A types 180 and 280A types
Dimensions
8A 8A 16A 25A 36A 50A 50A 64A 64A 80A 110A 180A 280A
(-H) (-33) (-34) (-33) (-34)
A180 200 200 200 200 200 200 200 200 400 400 510 700
B115 150 150 150 150 150 150 150 150 170 170 180 260
C60 65 65 65 65 65 65 65 80 90 90 130 155
D85 120 120 120 120 120 120 120 120 350 350 360 530
E115 115 115 115 115 115 115 115 115 373 373 470 660
F100 136 136 136 136 136 136 136 136 130 130 156 220
G6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 15 x 6.5 15 x 6.5 16 x 9 16 x 9
H1111111111 1 4 4
I17 17 17 25 25 25 39 25 39 39 45 85 110
JM6 M6 M6 M6 M6 M6 M6 M6 M6 M10 M10 M10 M10
K13 19.25 19.25 19.25 19.25 19.25 18.75 19.25 18.75 40 40 25 30
L17 17 17 18.4 18.4 18.4 17 18.4 17 70 70 85 100
All dimensions in mm; 1 inch = 25.4mm
Toleranc es ac cording: IS O 2768-m / EN 22768-m
Filter input/output connector cross sections
-29 -33 -34 -35 -36 -37
Solid wire 6mm216mm235mm250mm295mm2150mm2
Flex wire 4mm210mm225mm250mm295mm2150mm2
AWG type wire AWG 10 AWG 6 AWG 2 AWG 1/0 AWG 4/0 AWG 6/0
Recommended torque 0.6 - 0.8Nm 1.5 - 1.8Nm 4.0 - 4.5Nm 7 - 8Nm 17 - 20Nm 27 - 30Nm
Please visit www.schaffner.c om to find more details on filter connectors.
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