© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Data Line EMI Filters
–
Leaded
Document 149
Document 149 Revised 10/04/07
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 PDLF and CCDLF
surface mount filters. To order, contact Coilcraft or visit
http://order.coilcraft.com.
Current DCR
Part max L / winding max Isolation
number1Lines (mA) (µH) (mOhms) (Vrms)
DLF 8000L 8 100 28 100 300
DLF 8500L 8 500 25 45 300
DLF 4000L 4 100 28 100 300
DLF 4500L 4 500 24 45 300
DLF 3000L 3 100 28 100 300
DLF 3500L 3 500 24 45 300
DLF 2000L 2 100 28 100 300
DLF 2500L 2 500 24 45 300
1. For optional cover add “C” to part number just before the “L”: e.g. DLF 8500CL.
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 (Measured on an HP 8753D network analyzer. Ref: 50 Ohms)
8 line
8 line
0.650
16,51
0.100
2,54
0.100
2,54
0.100
2,54
0.100
2,54
0.200
5,08
0.0315
0,80
Pin 1 dia
ref
0.700
17,78 0.858
21,79
0.300
7,62
0.300
7,62
0.455
11,56
0.110 ±0.010
2,79 ±0,25
max
dia
max
0.850
21,59
0.450
11,43
0.350
8,90
0.350
8,90
0.475
12,07
0.450
11,43
0.125 ±0.020
3,18 ±0,51
0.0315
0,800
0.430
10,9
2 line
and
3 line
4 line 3 line 2 line
30
20
10
0
0.1 1 10 100 1000
Frequency (MHz)
Attenuation (dB)
Differential Mode
Common Mode
DLF X500
Common Mode
DLF X000
16 8
1
7
2
15 6
1
6
1
5
2
4
3
4
3
14 6
3
5
4
13 12 11 10 9
12345678
Terminations: Tin-silver over tin over phos bronze
Weight:
DLF2000: 0.74 g; DLF2500: 0.78 g
DLF3000: 0.83 g; DLF3500: 0.91 g
DLF4000: 0.95 g; DLF4500: 1.09 9
DLF8000: 1.56 g; DLF8500: 2.22 g
Dimensions are in inches
mm
