DATASHEET Two-Stage Filters FN 343
Performance EMI Filter
Rated currents from 1 to 10 A Approvals
Dual-stage filter
Compact housing
Integrated earth line choke
Features and benefits
FN 343 filters are designed for easy and fast chassis
mounting
Increased attenuation performance based on dual-
stage filter design and earth line choke
All FN 343 single-phase filters provide an excellent
attenuation performance, based on chokes with
high saturation and excellent thermal behavior
Faston connection
Integrated earth line choke
Compact design
Custom-specific versions on request
Typical applications
Electrical and electronic equipment
Consumer goods
Technical specifications
Household equipment
Power supplies
Maximum continuous operating voltage 250 VAC, 50/60 Hz
Office automation equipment
Operating frequency dc to 400 Hz
Rated currents 1 to 10 A @ 40 C max. Datacom equipment
High potential test voltage P > PE 2000 VAC for 2 sec
Industrial equipment auxiliary supply
P > N 760 VAC for 2 sec
Temperature range (operation and storage) -25 C to +100 C (25/100/21)
Typical electrical schematic
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) 970,000 hours2
EMC/EMI Products Schaffner Group Datasheets 2014
Filter selection table
Filter Rated current Leakage current* Inductance Capacitance Resistance Input/Output Weight
@ 40 C (25 C) @ 230 VAC/50 Hz L L1 L2 Cx Cy R connections
[A] [A] [mH] [mH] [mH] [nF] [nF] [M] [g]
FN 343-1-05 1 (1.15) 340 5.9 9.5 0.46 100 2.2 1 -05 160
FN 343-3-05 3 (3.4) 340 1.1 2 0.4 100 2.2 1 -05 160
FN 343-6-05 6 (6.9) 340 0.43 0.77 0.4 100 2.2 1 -05 160
FN 343-10-05 10 (11.5) 340 0.27 0.66 0.4 100 2.2 1 -05 160
* Maximum leakage under normal operating conditions. Note: if the neutral line is interrupted, worst case leakage could reach twice this level.
Typical filter attenuation
Per CISPR 17; A = 50 /50 sym; B = 50 /50 asym; C = 0.1 /100 sym; D = 100 /0.1 sym
1 A types 3 A types 6 and 10 A types
Mechanical data
Dimensions
1 to 10 A Tolerances
A 70 0.5
B 69 0.5
C 30.3 1
D 50 1
E 64.8 1
F 60 0.2
G 27 0.5
H 12.3 0.5
J 25 0.5
K 5.3
L 6.3
M 0.7
N 6.3 x 0.8
All dimensions in mm; 1 inch = 25.4 mm
Tolerances according: ISO 2768-m / EN 22768-m