B78108S1823J EPCOS Inc, B78108S1823J Datasheet - Page 19
![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
8.3
Figure 13
ductance. One of the chokes has a two-layer winding and the other is randomly wound. The choke
with random windings has a considerably higher first resonance frequency. The spurious resonanc-
es are very much higher than 10 MHz. The impedance at frequencies above the first resonance fre-
quency is approximately five times higher. This leads to better interference suppression at high
frequencies.
Fig. 13
The RF characteristics of all chokes supplied by EPCOS are within the specifications and reproduc-
ible, as the winding processes which we have developed for single-layer, multilayer and random
winding ensure that the characteristics of the inductors produced display very little variation.
The reproducibility of electrical characteristics of chokes is mainly determined by the production
technique used. At EPCOS, coils are wound mainly by automatic machines (either fully or semi-au-
tomated). This permits even complicated winding patterns to be produced in large production runs
with very little variation in product characteristics. In
chokes, some wound manually and some by machine, are shown for comparison. With the random
winding used in this comparison, the advantages of machine winding are clearly noticeable.
General Technical Information
RF characteristics of various types of winding
Random wdg.
2-layer wdg.
Impedance | Z | versus frequency f
comparison between two-layer winding and random winding
shows the relation between the impedance and the frequency for two chokes of equal in-
27
04/00
fig.
14, the impedance curves of several