Filters for Communication Lines
Analog Systems and Control Lines
Series/Type:
B84312
Date: January 2004
©
EPCOS AG 2004. Reproduction, publication and dissemination of this data sheet, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical
and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers' Associ-
ation), unless otherwise agreed.
Filters for communication lines
Analog systems and control lines
B84312
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
Space-saving solution for installing a number
of different filters.
Low profile and thus advantage especially for
just one or a few filters.
Filter selection
B84312C*B (2-line)
B84312C*H (20-line)
B84312F*B (2-line)
B84312C Upright
B84312F
Flat
2
Filters for communication lines
Analog systems and control lines
B84312
Filter applications
The following standard filters are designed for the most common applications; customized models
can be produced for differing requirements.
Passband
kHz
DC ... 3.4
DC ... 3.4
Z
L
Ω
600
600
I
R
A
0.1
0.1
Standard filters for telephone systems
Telephone systems for enhanced
requirements (stopband attenuation of
100 dB above 10 kHz )
Filters for telephone systems and
modem cables, conditionally for control
lines with critical signal rise times
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
Smoke detectors with serial data
transmission in bus systems and remote
power feeding, temperature switches,
24 V emergency lighting, DC motors
24-V emergency lighting, DC motors,
signal and control lines
Universal filters for signal and control
lines with up to 1 A
Control lines with up to 1 A and
enhanced attenuation requirements
Application
Circuit No. Series
diagram of
lines B84312
1
3
2
20
2
20
2
20
+0020B***
C0020H***
+0090B***
C0090H***
+0040B***
C0040H***
DC ... 50
600
0.1
1
DC ...120
DC ... 300
150
150
0.1
0.1
2
2
2
20
2
20
2
20
+0050B***
C0050H***
+0060B***
C0060H***
+0050B***
C0050H***
DC ... 120
100
2
2
3
1
1
2
1
3
2
20
2
20
2
20
+0050B***
C0050H***
+0030B***
C0030H***
+0100B***
C0100H***
+: C = upright installation, F = flat installation
3
Filters for communication lines
Analog systems and control lines
B84312
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 re-
turn line are routed paired through one filter.
4
Filters for communication lines
Analog systems and control lines
B84312
General technical data
Rated voltage
Rated voltage
Rated frequency
Rated current
Line impedance
Test voltage
Maximum DC resistance
Climatic category
(EN 60068-1)
Weight
Mechanical version
Filters with EMP protection:
Nominal DC spark-over voltage
Surge response voltage
Nominal surge current (8/20
µs)
Suppression condition
V
sdcN
<500
<800
<800
5/10
I
≤
I
R
V
V
V
kA
Per line
At 1 kV/µs
At 1 kV/ns
V
R,AC
100
V
R,DC
100
f
R
I
R
Z
L
V
test
R
max
See characteristics
See characteristics
250 VDC, 2 s
250 VDC, 2 s
See characteristics
25/+40
25/085/56
560
4.5
C
F
°C
25
°C/+85 °C/56
days damp
heat test
g 2-line filters
kg 20-line filters
Upright for 2- and 20-line filters
Flat for 2-line filters
Line/line
Line/case
Per line
V
V
Pass bandwidth at Z
L
T
A
= 40
°C
Permissible ambient temperature T
A
Maximum voltage on filter output for filters with EMP protection
Series
B84312 ...0020+1** ...0030+1** ...0040+1** ...0050+1** ...0060+1**
...0090+1** ...0100+1**
kV/µs
kV/µs
kV/ns
1)
2V
1V
0.5 V
5V
50 V
35 V
1V
20 V
360 V
60 V
2V
290 V
700 V
130 V
5V
200 V
8V
3V
0.5 V
12 V
250 V
60 V
3V
110 V
3V
2V
0.5 V
10 V
120 V
25 V
1V
25 V
12 V
9V
1.2 V
12 V
280 V
30 V
1V
50 V
Pulse shape in symmetrical circuit
dv/dt = 0.1
dv/dt = 1
dv/dt = 1
Nominal surge current (8/20
µs)
Pulse shape in unsymmetrical circuit
dv/dt = 0.1
dv/dt = 1
dv/dt = 1
kV/µs
kV/µs
kV/ns
1)
Nominal surge current (8/20
µs)
1) Typical test pulse: rise time 10 ns, time to half value 1500 ns, charge voltage min. 50 kV, source impedance 90
Ω
5
