Document 152
Tip and Ring Common Mode Filters
These economical filters are designed to help telecommuni-
cations equipment engineers meet FCC and CCITT require-
ments. Available in 1 or 2 line (2 or 4 wire) versions, Coilcraft
tip and ring filters provide >15 dB attenuation of common
mode noise over the 3 Hz to 300 MHz frequency range.
Part number:
Minimum inductance:
Rated current:
DC resistance:
Dielectric strength
1
:
TRF 2000 (1-line)
TRF 4000 (2-line)
20 µH
500 mA
0.065 Ohms max
1500 Vrms min
1. For TRF 2000, dielectric strength measured from pins 1,8 to 4,5. For
TRF 4000, dielectric strength measured from pins 1,2,7,8 to pins 3,4,5,6.
2. Operating temperature range –40°C to +85°C.
3. Electrical specifications at 25°C.
TRF 2000
C
TRF 4000
C
Typical Response*
0
Differential Mode
B
B
Attenuation (dB)
10
0.030
dia
0,76
D
D
20
Common mode
8
5
0.030
dia
0,76
8
7
6
5
30
A
A
40
0.1
1
10
100
1000
1
2
4
1
2
3
4
Frequency (MHz)
*
measured on HP 8753D network analyzer. Ref: 50 Ohms.
Recommended
Board Layout
8
Recommended
Board Layout
8
5
5
0.040
1,02
(8×)
0.040
1,02
(5×)
E
E
1
4
TRF 2000
8
5
TRF 4000
1
4
8
7
6
5
F
G
F
Weight:
1.52 g
Packaging:
100 parts per tray
1
4
1
2
3
4
Weight:
1.71 g
A max
0.425
10,80
B max
0.550
13,97
C max
0.475
12,07
D
0.115
2,92
E
0.300
7,62
F
0.100
2,54
G
0.300 inches
7,62 mm
Specifications subject to change without notice.
Document 152
Revised 09/03/09
© Coilcraft, Inc. 2009
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