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Ultra-compact low leakage current 3-phase and neutral line EMC/EMI filter
3-Phase + Neutral Line Filters 3-Phase + Neutral Line Filters FN 355FN 355
Ultra-compact four-wire filter for applications
lacking space
Exceptional low operating leakage current
Equally suitable for star and delta power
networks
Performance indicators
Technical specificationsTechnical specifications
Maximu m co n tin uo us operating voltageMaximu m co n tin uo us operating voltage 3x 440/250VAC
Operating frequ enc yOperating frequ enc y dc to 400Hz
Rated cu rrentsRated cu rrents 3 to 20A @ 40°C
High poten tial tes t vo ltageHigh poten tial tes t vo ltage P –> E 2000VAC for 2 sec
P –> P 1900VDC for 2 sec
Overload c apabilityOverload c apability 4x rated current at switch on,
1.5x rated current for 1 minute, once per hour
Temperatu re range (o peration andTemperatu re range (o peration and
sto rage)sto rage)
-25°C to +100°C (25/100/21)
Flammability co rrespon ding toFlammability co rrespon ding to UL 94V-2 or better
Design c o rres pon din g toDesign c o rres pon din g to UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939
MTBF @ 40°C/230V ( Mil-HB -217F)MTBF @ 40°C/230V ( Mil-HB -217F) 850,000 hours
Approvals
Features and benefitsFeatures 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 20A, 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 applicationsTypical applications
Office equipment
Medical equipment
General purpose four-wire filtering
Applications with tight space conditions
2 EMC/EMI Products Schaffner GroupSchaffner Group DatasheetsDatasheets 2014
Filter selection tableFilter selection table
Filter Filter Rated cu rrent Rated cu rrent Leakage cu rrent* Leakage cu rrent* Po wer loss Po wer loss Inpu t/ Output Inpu t/ Output Weight Weight
@ 40°C (25°C) @ 40°C (25°C) @ 400V AC/ 50Hz @ 400V AC/ 50Hz @ 25°C/50Hz @ 25°C/50Hz con nection s co nn ec ti on s
[A] [A] [mA] [mA] [W] [W] [kg][kg]
FN 355-3-0FN 355-3-0 3 (3.4) 0.07 1.4 -05 0.25
FN 355-6-0FN 355-6-0 6 (6.9) 0.07 1.5 -05 0.25
FN 355-10-0FN 355-10-0 10 (11.5) 0.07 1.8 -05 0.25
FN 355-20-0FN 355-20-0 20 (23) 0.29 3.4 -03 0.29
* 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 attenuationTypical filter attenuation
Per CISPR 17; A = 50Ω/50Ω sym; B = 50Ω/50Ω asym; C = 0.1Ω/100Ω sym; D = 100Ω/0.1Ω sym
3A types 6A types 10 and 20A types
Typical electrical schematic
3 EMC/EMI Products Schaffner GroupSchaffner Group DatasheetsDatasheets 2014
Mechanical dataMechanical data
Filters with faston terminals (3 to 10A types)
All dimensions in mm; 1 inch = 25.4mm
Tolerances according: ISO 2768-m / EN 22768-m
Filters with clamp terminals with M4 screw (20A types)
4 EMC/EMI Products Schaffner GroupSchaffner Group DatasheetsDatasheets 2014
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