Document 149
Data Line EMI Filters – Leaded
These filters are designed to virtually eliminate con-
ducted EMI in data line applications. They provide
exceptional common mode noise reduction from 5 MHz
to 300 MHz while passing signal line data frequencies
below 200 MHz with minimal attenuation.
These low resistance filters feature excellent electrical
isolation, environmental stability and low cost. Optional
covers make them auto insertable. They also meet IEC
695-2-2 needle flame test requirements. There are 8, 4,
3 and 2-line versions with DC current capacity of 100 mA
(DLF X000 series) or 500 mA (DLF X500 series).
Coilcraft
Designer’s Kit D303
contains four samples of
all values shown plus samples of our TTDLF/CCDLF
surface mount filters. To order, contact Coilcraft or visit
http://order.coilcraft.com.
Attenuation (dB) re: 50 Ohms
Current
DCR
Part
max L / winding
max
Isolation
number
1
Lines (mA)
(µH)
(mOhms)
(Vrms)
8
100
28
100
300
DLF 8000L
8
500
25
45
300
DLF 8500L
4
100
28
100
300
DLF 4000L
DLF 4500L
4
500
24
45
300
3
100
28
100
300
DLF 3000L
3
500
24
45
300
DLF 3500L
2
100
28
100
300
DLF 2000L
DLF 2500L
2
500
24
45
300
1. For optional cover add “C” to part number. Not available on 3500, 4000 and
4500 parts.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
Typical Response*
0
Differential Mode
10
20
Co
m
DL mo
F nM
X5 o
00 de
Co
m
DL mon
F
X0 Mod
00 e
30
0.1
1
10
100
1000
Frequency (MHz)
*measured on HP 8753D network analyzer.
0.450
11,43
0.350
8,90
0.350
8,90
0.450
11,43
0.475
max
12,07
0.0315
dia
0,800
0.125 ±0.020
3,18 ±0,51
0.850
max
21,59
8 line
4 line
3 line
2 line
0.110 ±0.010
2,79 ±0,25
0.650
16,51
0.430
10,9
3 line
0.430
10,9
2 line
8 line
0.300
7,62
0.455
11,56
Pin 1
0.100
2,54
0.700
ref
17,78
0.858
21,79
0.0315 dia
0,80
16 15 14 13 12 11 10 9
8 7 6 5
6 5 4
6 4
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3
1 3
Terminations:
Tin-silver over tin
Specifications subject to change without notice.
Please check our website for latest information.
Document 149
Revised 01/28/05
© Coilcraft, Inc. 2005
Embedded System
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