B78108S1823J EPCOS Inc, B78108S1823J Datasheet - Page 11
![CHOKE RF 82UH 390MA AXIAL](/photos/29/25/292535/b78_sml.jpg)
B78108S1823J
Manufacturer Part Number
B78108S1823J
Description
CHOKE RF 82UH 390MA AXIAL
Manufacturer
EPCOS Inc
Series
BCr
Type
Ferrite Corer
Specifications of B78108S1823J
Inductance
82µH
Tolerance
±5%
Current
390mA
Dc Resistance (dcr)
1.540 Ohm Max
Q @ Freq
35 @ 2.52MHz
Self Resonant Freq
6MHz
Package / Case
Axial
Mounting Type
Through Hole
Frequency - Test
2.52MHz
Material - Core
Ferrite Drum
Applications
General Purpose
Dimensions
4 mm Dia. x 53 mm L
Test Frequency
2.52 MHz
Maximum Dc Current
390 mA
Maximum Dc Resistance
1.54 Ohms
Self Resonant Frequency
6 MHz
Q Minimum
35
Operating Temperature Range
- 55 C to + 125 C
Termination Style
Axial
Inductance Tolerance
± 5%
Dc Resistance Max
1.54ohm
Dc Current Rating
390mA
Q Test Frequency
2.52MHz
Inductor Case Style
Axial Leaded
No. Of Pins
2
Svhc
No SVHC (18-Jun-2010)
Rohs Compliant
Yes
Body Diameter
4mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Shielding
-
Current - Saturation
-
Current - Temperature Rise
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
B78108S1823J000
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
B78108S1823J000
Manufacturer:
EPCOS/爱普科斯
Quantity:
20 000
An interference source which is at a floating potential primarily emits differential-mode, i.e. symmet-
rical interference which is propagated along the connected lines. On power lines, the interference
current will flow towards the disturbed equipment on one wire and away from it on the other wire,
just as the mains current does.
Symmetrical or differential-mode interference occurs mainly at low frequencies (up to several
hundred kHz).
However, parasitic capacitances in interference sources and disturbed equipment or intended
ground connections, also lead to an interference current in the ground circuit. This interference cur-
rent flows towards the disturbed equipment through both the connecting lines and returns to the in-
terference source through the ground lines.The currents on the connecting lines are in common
mode and the interference is thus designated as common-mode or asymmetrical interference.
Since the parasitic capacitances will tend towards representing a short-circuit with increasing fre-
quencies and the coupling to the connecting cables and the equipment itself will increase corre-
spondingly, common-mode interference becomes dominant at multiple-MHz frequencies.
In European usage, the concept of an “unsymmetrical interference” is used, in addition to the two
components described above, to describe interference. This term is used to describe the interfer-
ence voltage between a line and reference ground potential.
2.6
Interference suppression filters are virtually always designed as reflecting lowpass filters, i.e. they
reach their highest insertion loss when they are - on the one hand - mismatched to the impedance
of the interference source or disturbed equipment and - on the other hand - mismatched to the im-
pedance of the line. Possible filter circuits for various line, interference source and disturbed equip-
ment impedance conditions are shown in
Line
impedance
low
high
high
unknown
low
low
unknown
Fig. 9
General Technical Information
Filter circuits and line impedance
Filter circuits and impedance relationships
Impedance of
source of interference / disturbed equipment
high
high
high
unknown
low
low
unknown
fig.
9.
19
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