Tip and Ring Common Mode Filters
Document 257-1
Specifications subject to change without notice.
Document 257-1
Revised 12/03/02
These high performance, high current tip and ring filters
are designed to help telecom equipment engineers
meet FCC and CCITT requirements.
They provide up to 35 dB attenuation of common mode
noise over a broad frequency range, while the low
differential mode attenuation assures excellent signal
integrity. The filters come in 2- and 1-line versions and
provide 1500 Vrms isolation between pairs.
For free evaluation samples, contact Coilcraft or visit
www.coilcraft.com.
Patent pending
Single line filters
Rated
DCR3
Dielectric
Part
Inductance1 current2
max
strength4
Common mode attenuation typ5
number
Lines
min (H)
(A)
(Ohms)
min (Vrms)
–10 dB
–20 dB
–30 dB
TRC2050
1
140
0.50
0.225
1500
0.4– >1000 MHz
1.2–400 MHz
6.5–70 MHz
TRC4050*
1
140
1.00*
0.113
1500
0.2– 400 MHz
0.6–100 MHz
2–20 MHz
TRC2120
1
70
1.20
0.150
1500
0.6– >1000 MHz
2.2–320 MHz
40–120 MHz
TRC2200
1
20
2.00
0.055
1500
0.5– >1000 MHz
2.2–320 MHz
–
TRC4120*
1
70
2.40*
0.075
1500
0.5– >1000 MHz
2–120 MHz
9–140 MHz
TRC4200*
1
20
4.00*
0.028
1500
1.8 – 350 MHz
7–110 MHz
–
* When two windings are connected in parallel on the board. See schematic above.
Dual line filters
Rated
DCR3
Dielectric
Part
Inductance1 current2
max
strength4
Common mode attenuation typ5
number
Lines
min (H)
(A)
(Ohms)
min (Vrms)
–10 dB
–20 dB
–30 dB
TRC4050
2
140
0.50
0.225
1500
0.25–400 MHz
0.8–110 MHz
3–20 MHz
TRC4120
2
70
1.20
0.150
1500
0.4– >1000 MHz
1.4–300 MHz
10–110 MHz
TRC4200
2
20
2.00
0.055
1500
1.2–500 MHz
6–300 MHz
85–110 MHz
Parts/reel: 13
″ 300 Tape width: 24 mm
For packaging data see Tape and Reel Specifications section.
1. Inductance measured at 100 kHz, 0.1 Vrms, using Agilent/HP 4263B
impedance analyzer.
2. Average current for 40°C temperature rise above 25°C ambient.
3. DCR measured on Keithley micro-ohmmeter.
4. Single line parts: 1-4, dual line parts: 1,2-3,4.
5. Measured using Agilent/HP 8753ES network analyzer.
6. Operating temperature range -40°C to +85°C.
7. Electrical specifications at 25°C.