Inductors
RF chokes, BC series
Series/Type:
Date:
B78108S, B78148S
June 2012
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EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
RF chokes
BC series, 4 x 9.2 (mm)
BC chokes (Bobbin Core)
Rated inductance 1 ... 4700 μH
Rated current 55 ... 1200 mA
Construction
■
Ferrite drum core
■
Winding: enamel copper wire
■
Flame-retardant lacquer coating
B78108S, B78148S
B78108S
Features
■
■
■
■
■
Wide inductance range
Suitable for general-purpose application
Special versions available
Suitable for wave soldering
RoHS-compatible
B78148S
Applications
■
RF blocking and filtering
■
Decoupling and interference suppression
■
For antenna systems, automotive electronics,
energy-saving lamps, entertainment electronics
Terminals
■
■
■
■
Central axial leads (B78108S)
Radially bent to 5 mm lead spacing (B78148S)
Base material Cu
Electroplated with nickel and pure tin
Marking
Inductance indicated by color bands to IEC 60062
Delivery mode and packing units
■
Taped, Ammo and reel packing
■
Packing units:
Ammo
(pcs./pack.)
Axial
Radial
2500
2500
Reel
(pcs./reel)
5000
2000
Please read
Cautions and warnings
and
Important notes
at the end of this document.
2
06/12
RF chokes
BC series, 4 x 9.2 (mm)
Dimensional drawings
B78108S (axial leads, taped)
65±1
53±2
B78108S, B78148S
Dimensions in mm
ø0.8 max.
ø4 max.
9.2 max.
(IEC 60294)
6±0.5
3.5 min.
11.5 max.
lacquered
5±0.25 5±0.25
IND0429-B-E
Minimum lead spacing 12.5 mm
B78148S (central radial leads, taped)
ø4 max.
1.3 max.
2 max.
2 max.
0.8 max.
0.5 max.
9.2 max.
(IEC 60294)
11.5 max.
lacquered
1.3 max.
insulated
30.5 max.
_
0.5
9
+0.75
16±0.5
Thickness of tape
0.7±0.2
IND0629-B
_
0.5
18
+1
6 min.
ø4±0.2
3.8±0.7
12.7±0.3
_
0.1
5
+0.6
IND0633-N-E
Packing
ø30.5±0.15
ø82+1
ø90
30
ø360
_
1
30
H
n
w
Label
30
IND0452-V-E
L
W
IND0631-B-E
n (mm): Axial 72 +1, radial 42 +1
w (mm): Axial 84 max., radial 54 max.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
L W H (max. mm):
Axial: 275 80 140, radial: 340
3
06/12
50 210
RF chokes
BC series, 4 x 9.2 (mm)
Technical data and measuring conditions
Rated inductance L
R
B78108S, B78148S
Measured with LCR meter Agilent 4284A
or impedance analyzer Agilent 4294A
Measuring frequency:
L
R
10 H
= 1 MHz
10 H < L
R
4700 H = 100 kHz
Measuring current:
1 mA
Measuring temperature: +20 °C
Measured with precision impedance analyzer Agilent 4294A,
+20 °C
+40 C
Maximum permissible DC current at rated temperature
10% (referred to initial value) at I
R
, +20 C
Measured at 20 C
Sn95.5Ag3.8Cu0.7: +(245 5) °C, (3 0.3) s
Wetting of soldering area 90%
(to IEC 60068-2-20, test Ta)
+(260 5) °C, 10 s (to IEC 60068-2-20, test Tb)
20 N (to IEC 60068-2-21, test Ua)
55/125/56 (to IEC 60068-1)
Mounted: –55 °C … +125 °C
Packaged: –25 °C … +40 °C, 75% RH
Approx. 0.38 g
Q factor Q
min
Rated temperature T
R
Rated current I
R
Inductance decrease L/L
0
DC resistance R
max
Solderability (lead-free)
Resonance frequency f
res,min
Measured with Agilent 4294A or 8753ES, +20 °C
Resistance to soldering heat
Tensile strength of leads
Climatic category
Storage conditions
Weight
Mounting information
When bending the leads, take care that the start-of-winding areas at the face ends (protected by
glue and lacquer) are not subjected to any mechanical stress.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
4
06/12
RF chokes
BC series, 4 x 9.2 (mm)
Characteristics and ordering codes
L
R
H
1.0
1.2
1.5
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
27
33
39
10%
^
B78108S, B78148S
Tolerance
1)
K
Q
min
55
55
55
55
55
60
60
60
60
60
65
65
70
70
60
60
55
55
55
50
f
Q
MHz
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
I
R
mA
1200
1150
1100
1030
1000
940
900
850
820
780
670
690
680
650
610
580
560
530
500
470
R
max
0.16
0.18
0.20
0.22
0.25
0.26
0.29
0.31
0.34
0.38
0.51
0.48
0.49
0.55
0.60
0.67
0.74
0.83
0.92
1.02
f
res, min
MHz
205
185
165
155
140
125
115
105
95
85
75
50
35
30
20
17
13
10
9.0
8.0
Ordering code
2)
(reel packing)
3)
B781
*
8S1102K000
B781
*
8S1122K000
B781
*
8S1152K000
B781
*
8S1182K000
B781
*
8S1222K000
B781
*
8S1272K000
B781
*
8S1332K000
B781
*
8S1392K000
B781
*
8S1472K000
B781
*
8S1562K000
B781
*
8S1682K000
B781
*
8S1822K000
B781
*
8S1103K000
B781
*
8S1123K000
B781
*
8S1153K000
B781
*
8S1183K000
B781
*
8S1223K000
B781
*
8S1273K000
B781
*
8S1333K000
B781
*
8S1393K000
BC chokes with temperature range up to +140 °C on request.
BC chokes up to 33 H with higher resonance frequency on request.
1) Closer tolerances on request.
2) Replace the
*
by code number »0« for axial taping or by »4« for radial taping.
3) For Ammo pack the last digit has to be a »9«. Example: B78108S1102K009
Please read
Cautions and warnings
and
Important notes
at the end of this document.
5
06/12
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