Ultra-compact Low Leakage current EMC/EMI Filter
3-Phase + Neutral Line Filters FN 355
Ultra-compact four-wire filter for applications
lacking space
Exceptional low operating leakage current
Equally suitable for star and delta power networks
Approvals
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 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 applications
Office equipment
Technical specifications
Maximum continuous operating voltage
Operating frequency
Rated currents
High potential test voltage
Overload capability
Temperature range (operation and storage)
Flammability corresponding to
Design corresponding to
3x 440/250 VAC
dc to 400 Hz
Medical equipment
General purpose four-wire filtering
Applications with tight space conditions
3 to 20 A @ 40 °C
P –> E 2000 VAC for 2 sec
Typical electrical schematic
P –> P 1900 VDC for 2 sec
4x rated current at switch on,
1.5x rated current for 1 minute, once per hour
-25 °C to +100 °C (25/100/21)
UL 94 V-2 or better
UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939
850,000 hours
MTBF @ 40°C/230V (Mil-HB-217F)
2
EMC/EMI Products
Schaffner Group
Datasheets
2014
Filter selection table
Filter
@ 40 °C (25 °C)
3 (3.4)
10 (11.5)
20 (23)
6 (6.9)
[A]
Rated current
Leakage current*
@ 400 VAC/50 Hz
[mA]
0.07
0.07
0.07
@ 25 °C/50 Hz
[W]
1.4
1.5
1.8
Power loss
Input/Output
connections
-05
Weight
[kg]
FN 355-3-05
FN 355-6-05
FN 355-10-05
FN 355-20-03
-05
0.25
0.29
3.4
-03
-05
0.25
0.29
0.25
* 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
3 A types
Per CISPR 17; A = 50 Ω/50 Ω sym; B = 50 Ω/50 Ω asym; C = 0.1 Ω/100 Ω sym; D = 100 Ω/0.1 Ω sym
6 A types
10 and 20A types
Mechanical data
Filters with faston terminals (3 to 10 A types)
Filters with clamp terminals with M4 screw (20 A types)
All dimensions in mm; 1 inch = 25.4 mm
Tolerances according: ISO 2768-m / EN 22768-m
Please visit www.schaffner.com to find more details on connectors.
3
EMC/EMI Products
Schaffner Group
Datasheets
2014
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