Page 1
B78108-SRF Chokes
BC Series B78148-S
BC chokes (Bobbin Core)
Rated current 55 to 1200 mA
Rated inductance 1 to 4700 µH
Construction
■ Ferrite drum core
■ Winding: enamel copper wire
■ Flame-retardant lacquer coating
Features
■ Wide inductance range
■ Suitable for general-purpose application
■ Special versions available
Applications
■ RF blocking and filtering
■ Decoupling and interference suppression
■ For antenna systems, automotive electronics,
energy-saving lamps, entertainment electronics
Terminals
■ Central axial leads, tinned
■ Radially bent to 5 mm lead spacing
Marking
Inductance indicated by color bands in accordance with IEC 60062
Delivery mode
Taped, AMMO and reel packing
For details on taping, packing and packing units see page 187
Dimensional drawing
B78108-S (axial leads, taped) B78148-S (central radial leads, taped)
65±1
9,2 max.
nach DIN 41099
to IEC 41099
ø4 max.
ø0,7 max.
11,5 max.
lackiert
laqueur coated
Minimum lead spacing 12,5 mm
6±0,5
55
SSB0084-1
16
14
5
12,7
SSB0085-9
Approx. weight 0,38 g
170 04/00
Page 2
B78108-SRF Chokes
B78148-SBC Series
Characteristics and ordering codes
For further technical data see page 160
L
µH
R
Tolerance
Q
min
1)
f
Q
MHz
I
R
mA
R
max
Ω
f
res, min
MHz
Ordering code
2)3)
1,0 ± 10 % K55 7,96 1200 0,16 205 B781*8-S1102-K
1,2 55 7,96 1150 0,18 185 B781*8-S1122-K
^
1,5 55 7,96 1100 0,20 165 B781*8-S1152-K
1,8 55 7,96 1030 0,22 155 B781*8-S1182-K
2,2 55 7,96 1000 0,25 140 B781*8-S1222-K
2,7 60 7,96 940 0,26 125 B781*8-S1272-K
3,3 60 7,96 900 0,29 115 B781*8-S1332-K
3,9 60 7,96 850 0,31 105 B781*8-S1392-K
4,7 60 7,96 820 0,34 95 B781*8-S1472-K
5,6 60 7,96 780 0,38 85 B781*8-S1562-K
6,8 65 7,96 670 0,51 75 B781*8-S1682-K
8,2 65 7,96 690 0,48 50 B781*8-S1822-K
10 70 2,52 680 0,49 35 B781*8-S1103-K
12 70 2,52 650 0,55 30 B781*8-S1123-K
15 60 2,52 610 0,60 20 B781*8-S1153-K
18 60 2,52 580 0,67 17 B781*8-S1183-K
22 55 2,52 560 0,74 13 B781*8-S1223-K
27 55 2,52 530 0,83 10 B781*8-S1273-K
33 55 2,52 500 0,92 9,0 B781*8-S1333-K
39 50 2,52 470 1,02 8,0 B781*8-S1393-K
1) Closer tolerances upon request.
2) Replace the asterisk
3) Ordering code for reel packing. For AMMO packing append code number »9«. Example: B78108-S1102-K9
by code number »0« for axial taping or by »4« for radial taping.
*
171 04/00
Page 3
B78108-SRF Chokes
B78148-SBC Series
Characteristics and ordering codes (continued)
For further technical data see page 160
L
µH
R
Tolerance
Q
min
1)
f
Q
MHz
I
R
mA
R
max
Ω
f
res, min
MHz
Ordering code
47 ± 5 % J45 2,52 450 1,10 7,5 B781*8-S1473-J
56 40 2,52 430 1,23 7,0 B781*8-S1563-J
^
68 40 2,52 410 1,35 6,5 B781*8-S1683-J
82 35 2,52 390 1,54 6,0 B781*8-S1823-J
100 70 0,796 370 1,70 5,0 B781*8-S1104-J
120 70 0,796 300 2,40 4,5 B781*8-S1124-J
150 70 0,796 280 2,80 4,2 B781*8-S1154-J
180 70 0,796 270 3,00 3,9 B781*8-S1184-J
220 70 0,796 250 3,30 3,7 B781*8-S1224-J
270 70 0,796 200 5,70 2,8 B781*8-S1274-J
330 70 0,796 190 6,40 2,7 B781*8-S1334-J
390 70 0,796 180 7,00 2,4 B781*8-S1394-J
470 70 0,796 170 7,90 2,2 B781*8-S1474-J
560 60 0,796 160 8,80 2,0 B781*8-S1564-J
680 55 0,796 150 10,0 1,9 B781*8-S1684-J
820 50 0,796 140 12,0 1,6 B781*8-S1824-J
1000 50 0,252 130 14,0 1,6 B781*8-S1105-J
1200 50 0,252 115 17,5 1,3 B781*8-S1125-J
1500 50 0,252 100 23,0 1,25 B781*8-S1155-J
1800 50 0,252 95 26,0 1,2 B781*8-S1185-J
2200 40 0,252 80 34,7 1,1 B781*8-S1225-J
2700 40 0,252 75 40,0 1,0 B781*8-S1275-J
3300 40 0,252 62 59,5 0,9 B781*8-S1335-J
3900 40 0,252 59 66,0 0,8 B781*8-S1395-J
4700 35 0,252 55 78,0 0,7 B781*8-S1475-J
2)3)
1) Closer tolerances upon request.
2) Replace the asterisk
3) Ordering code for reel packing. For AMMO packing append code number »9«. Example: B78108-S1473-J9
by code number »0« for axial taping or by »4« for radial taping.
*
172 04/00
Page 4
B78108-SRF Chokes
B78148-SBC Series
Impedance |Z|
versus frequency
f
measured with impedance analyzer
HP 4191A / HP 4194A
Q
factor
versus frequency
f
measured with impedance analyzer
HP 4194A
Inductance
versus dc load current
L
I
DC
measured with LCR meter
HP 4275A
173 04/00
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