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.
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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
B84312CUpright Space-saving solution for installing a number
of different filters.
B84312C*B(2-line)
B84312C*H(20-line)
B84312FFlat Low profile and thus advantage especially for
just one or a few filters.
B84312F*B(2-line)
Filters for communication lines B84312
Analog systems and control lines
2
Filter applications
The following standard filters are designed for the most common applications; customized models
can be produced for differing requirements.
Passband
kHz
ZL
Ω
IR
A
Application Circuit
diagram
No.
of
lines
Series
B84312
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 Data signals with balanced signal
transmission mode as used
2 2
20
+0050B***
C0050H***
DC ... 300 150 0.1 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
Filters for communication lines B84312
Analog systems and control lines
3
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.
Filters for communication lines B84312
Analog systems and control lines
4
1) Typical test pulse: rise time 10 ns, time to half value 1500 ns, charge voltage min. 50 kV, source impedance 90 Ω
General technical data
Rated voltage VR,AC 100 V
Rated voltage VR,DC 100 V
Rated frequency fRPass bandwidth at ZL
Rated current IRSee characteristics TA=40°C
Line impedance ZLSee characteristics
Test voltage Vtest 250 VDC, 2 s Line/line
250 VDC, 2 s Line/case
Maximum DC resistance Rmax See characteristics Per line
Permissible ambient temperature TA25/+40 °C
Climatic category
(EN 60068-1)
25/085/56 25 °C/+85 °C/56 days damp
heat test
Weight 560 g 2-line filters
4.5 kg 20-line filters
Mechanical version C Upright for 2- and 20-line filters
F Flat for 2-line filters
Filters with EMP protection:
Nominal DC spark-over voltage VsdcN <500 V Per line
Surge response voltage <800 V At 1 kV/µs
<800 V At 1 kV/ns
Nominal surge current (8/20 µs) 5/10 kA
Suppression condition I ≤IR
Maximum voltage on filter output for filters with EMP protection
Series B84312 ...0020+1**
...0090+1**
...0030+1**
...0100+1**
...0040+1** ...0050+1** ...0060+1**
Pulse shape in symmetrical circuit
dv/dt = 0.1 kV/µs2 V 360 V 8 V 3 V 12 V
dv/dt = 1 kV/µs1 V 60 V 3 V 2 V 9 V
dv/dt = 1 kV/ns1) 0.5 V 2 V 0.5 V 0.5 V 1.2 V
Nominal surge current (8/20 µs) 5 V 290 V 12 V 10 V 12 V
Pulse shape in unsymmetrical circuit
dv/dt = 0.1 kV/µs50 V 700 V 250 V 120 V 280 V
dv/dt = 1 kV/µs35 V 130 V 60 V 25 V 30 V
dv/dt = 1 kV/ns1) 1 V 5 V 3 V 1 V 1 V
Nominal surge current (8/20 µs) 20 V 200 V 110 V 25 V 50 V
Filters for communication lines B84312
Analog systems and control lines
5
2) Control line filters, not matched
3) Not specified
Characteristics and ordering codes
IR
A
Pass
bandwidth
kHz
ZL
Ω
Rmax
Per line
Ω
Circuit
diagram
Number of
lines
Ordering code
*: 0 = Standard filters
1 = Filters with EMP protection
0.1 DC ... 3.4 600 11 12B84312C0020B*03
0.1 DC ... 3.4 600 11 12B84312F0020B*03
0.1 DC ... 3.4 600 11 120 B84312C0020H*03
12) 3) 0.4 1 2B84312C0030B*03
12) 3) 0.4 1 2B84312F0030B*03
12) 3) 0.4 1 20 B84312C0030H*03
0.1 DC ... 50 600 1.1 1 2B84312C0040B*01
0.1 DC ... 50 600 1.1 1 2B84312F0040B*01
0.1 DC ... 50 600 1.1 1 20 B84312C0040H*01
0.1 DC ... 120 150 4.4 2 2B84312C0050B*01
0.1 DC ... 120 150 4.4 2 2B84312F0050B*01
0.1 DC ... 120 150 4.4 2 20 B84312C0050H*01
2DC ... 120 100 0.4 2 2B84312C0050B*21
2DC ... 120 100 0.4 2 2B84312F0050B*21
2DC ... 120 100 0.4 2 20 B84312C0050H*21
32) 3) 0.2 2 2B84312C0050B*31
32) 3) 0.2 2 2B84312F0050B*31
32) 3) 0.2 2 20 B84312C0050H*31
0.1 DC ... 300 150 1.0 2 2B84312C0060B*01
0.1 DC ... 300 150 1.0 2 2B84312F0060B*01
0.1 DC ... 3.4 600 17 32B84312C0090B*04
0.1 DC ... 3.4 600 17 32B84312F0090B*04
0.1 DC ... 3.4 600 17 320 B84312C0090H*04
12) 3) 0.6 3 2B84312C0100B*03
12) 3) 0.6 3 2B84312F0100B*03
12) 3) 0.6 3 20 B84312C0100H*03
Filters for communication lines B84312
Analog systems and control lines
6
Insertion loss αein passband (typical)
Symmetrical measurement circuit
with ZL= 600 Ω
Symmetrical measurement circuit
with ZL= 150 Ω
Filters for communication lines B84312
Analog systems and control lines
7
Unsymmetrical measurement (common-mode-rejection) in passband
Filter with ZL= 600 Ω
CMR >40 dB in passband
Filters for communication lines B84312
Analog systems and control lines
8
Insertion loss αein stopband (typical)
Unsymmetrical measurement circuit
Asymmetrical measurement
to MIL-STD-220A
Filters for communication lines B84312
Analog systems and control lines
9
Dimensional drawings
2-line filters, upright installation
➀Line connections at both ends:
2 x tab connectors for receptacle 2.8 x 0.5 (in accessory bag)
➁Strain relief with ground connection for cable diameter 4.5 ... 6 mm
Hole for installation in shielding wall
Filters for communication lines B84312
Analog systems and control lines
10
2-line filters, flat installation
➀Line connections at both ends:
2 x tab connectors for receptacle 2.8 x 0.5 (in accessory bag)
➁Strain relief with ground connection for cable diameter 4.5 ... 6 mm
Hole for installation in shielding wall
Filters for communication lines B84312
Analog systems and control lines
11
20-line filters, upright installation
Hole for installation in shielding wall
Adapter
A bracket adapter is available for flat installation on the shielding wall.
Ordering code: B84298M0012C004
Filters for communication lines B84312
Analog systems and control lines
12
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
EPCOS:
B84312C90B104 B84312C100B102 B84312C50B101 B84312C20B3 B84312C40H101 B84312F100B3
B84312C60B101 B84312C20H3 B84312F60B1 B84312C100H103 B84312C50H1 B84312C50B1 B84312C100B3
B84312C40B1 B84312F50B1 B84312F90B4 B84312C40H1 B84312C90B4 B84312C30B103 B84312C50H101
B84312C100B2 B84312C90H4 B84312F100B103 B84312F30B3 B84312C30H3 B84312C100H3 B84312C90H104
B84312C20B103 B84312F20B3 B84312C100B103 B84312C40B101 B84312C30H103 B84312C30B3
B84312F0040B001 B84312C0050B021 B84312F0050B021 B84312C0050H021 B84312C0050B031
B84312F0020B103 B84312C0020H103 B84312F0030B103 B84312F0040B101 B84312F0050B101
B84312F0060B101 B84312F0090B104 B84312C0020H013 B84312C0030H013
