Filters for Communication Lines
Analog Systems and Control Lines
Series/Type:
B84312
Date: January 2004
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information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Filters for communication lines
B84312
Analog systems and control lines
Passband up to 300 kHz
Stopband attenuation up to 40 GHz
Features
Use of coaxial feed-through capacitors on input and output
Single or current-balanced chokes depending on requirement
Insertion loss to CISPR 17
Also available with integrated EMP protection
Installation
Single filters are attached directly to the shielding wall. Larger numbers can be housed in filter
cabinets or boxes. Various models and the matching flexible connector fittings are available.
Mechanical design
The electrical components are incorporated in an RF-tight case of tin-plated sheet steel. Filters
are available for 2 or 20 lines and for upright or flat installation on shielding wall.
Model
Installation
Filter selection
B84312C Upright
Space-saving solution for installing a number
of different filters.
B84312C*B (2-line)
B84312C*H (20-line)
B84312F
Low profile and thus advantage especially for
just one or a few filters.
B84312F*B (2-line)
Flat
2
Filters for communication lines
B84312
Analog systems and control lines
Filter applications
The following standard filters are designed for the most common applications; customized models
can be produced for differing requirements.
Passband
ZL
IR
Application
Circuit No. Series
diagram of
lines B84312
kHz
Ω
A
DC ... 3.4
600
0.1
Standard filters for telephone systems
1
2
20
+0020B***
C0020H***
DC ... 3.4
600
0.1
Telephone systems for enhanced
requirements (stopband attenuation of
100 dB above 10 kHz )
3
2
20
+0090B***
C0090H***
DC ... 50
600
0.1
Filters for telephone systems and
modem cables, conditionally for control
lines with critical signal rise times
1
2
20
+0040B***
C0040H***
DC ...120
150
0.1
2
2
20
+0050B***
C0050H***
DC ... 300
150
0.1
Data signals with balanced signal
transmission mode as used
by modems or interfaces
RS 485 up to 9600 Baud and/or
RS 422 up to 19200 Baud
2
2
20
+0060B***
C0060H***
DC ... 120
100
2
Smoke detectors with serial data
transmission in bus systems and remote
power feeding, temperature switches,
24 V emergency lighting, DC motors
2
2
20
+0050B***
C0050H***
3
24-V emergency lighting, DC motors,
signal and control lines
2
2
20
+0050B***
C0050H***
1
Universal filters for signal and control
lines with up to 1 A
1
2
20
+0030B***
C0030H***
1
Control lines with up to 1 A and
enhanced attenuation requirements
3
2
20
+0100B***
C0100H***
+: C = upright installation, F = flat installation
3
Filters for communication lines
B84312
Analog systems and control lines
Circuit diagrams
The diagrams each show a circuit of a 2-line filter.
In the series of 20-line filters there are 10 of them in each case.
Circuit diagram 1
Circuit diagram 2
Circuit diagram 3
Note on circuit diagrams 2 and 3:
These filters are mounted with current-compensated chokes. Make sure that the forward and return line are routed paired through one filter.
4
Filters for communication lines
B84312
Analog systems and control lines
General technical data
Rated voltage
VR,AC 100
V
Rated voltage
VR,DC 100
V
Rated frequency
fR
Rated current
IR
See characteristics
Line impedance
ZL
See characteristics
Test voltage
Vtest
250 VDC, 2 s
250 VDC, 2 s
Maximum DC resistance
Rmax
See characteristics
Pass bandwidth at Z L
TA = 40 °C
Line/line
Line/case
Per line
Permissible ambient temperature TA
25/+40
Climatic category
(EN 60068-1)
25/085/56
Weight
560
4.5
Mechanical version
C
Upright for 2- and 20-line filters
F
Flat for 2-line filters
°C
25 °C/+85 °C/56 days damp
heat test
g 2-line filters
kg 20-line filters
Filters with EMP protection:
Nominal DC spark-over voltage
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