Document 260-1
Common Mode Chokes – BU Series
These low cost, high performance choke coils are de-
signed to virtually eliminate line conducted common
mode noise.
The BU9S and BU9HS families are ideal for signal line
applications; the others can be used in switching power
supplies and power supply circuits. All provide signifi-
cant attenuation of common mode noise across a broad
range of frequencies.
For height-restricted applications, the BU9 and BU9S
filters are available in a horizontal configuration, which
reduces their height to under half an inch (12.5 mm).
For free evaluation samples, contact Coilcraft or request
them on-line at
www.coilcraft.com.
Core material
Ferrite
Terminations
RoHS compliant tin-silver over copper. Other terminations available at additional cost.
Weight
BU9: 3.1 – 4.1 g
BU9H: 3.1 – 4.1 g
BU9HS: 3.1 – 3.8 g
BU9S: 3.1 – 3.8 g
BU10: 6.2 – 6.6 g
BU15: 14.6 – 16.1 g
BU16: 15.1 – 18.0 g
Ambient temperature
–40°C to +125°C
Storage temperature
Component: –40°C to +125°C.
Packaging: –40°C to +80°C
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C / 85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging
BU9: 100 per tray
BU9H: 100 per tray
BU9HS: 100 per tray
BU9S: 100 per tray
BU10: 100 per tray
BU15: 80 per tray
BU16: 80 per tray
PCB washing
Only pure water or alcohol recommended
Specifications subject to change without notice.
Please check our website for latest information.
Document 260-1
Revised 09/09/09
© Coilcraft, Inc. 2009
Document 260-2
Common Mode Chokes - BU9, BU9H Series
Part number
BU9-103R25BL
BU9-2820R5BL
BU9-1320R7BL
BU9-6011R0BL
BU9-2011R6BL
BU9H-103R25BL
BU9H-2820R5BL
BU9H-1320R7BL
BU9H-6011R0BL
BU9H-2011R6BL
1.
2.
3.
4.
Impedance max
(kOhms)
60 @ 220 kHz
53 @ 410 kHz
52 @ 660 kHz
36 @ 1300 kHz
5.4 @ 1500 kHz
60 @ 220 kHz
53 @ 410 kHz
52 @ 660 kHz
36 @ 1300 kHz
5.4 @ 1500 kHz
Frequency range
@ 75% of
impedance max
200 – 240 kHz
310 – 430 kHz
600 – 700 kHz
1200 – 1400 kHz
900 – 2100 kHz
200 – 240 kHz
310 – 430 kHz
600 – 700 kHz
1200 – 1400 kHz
900 – 2100 kHz
DCR
1
(Ohms)
3.5
1.0
0.5
0.2
0.1
3.5
1.0
0.5
0.2
0.1
Current
max (Aac)
0.25
0.50
0.70
1.00
1.60
0.25
0.50
0.70
1.00
1.60
Inductance
2
L1, L2
min (mH)
10.0
2.8
1.3
0.6
0.2
10.0
2.8
1.3
0.6
0.2
Inductance difference
L1 - L2
max (µH)
200
50
50
25
25
200
50
50
25
25
DCR is per winding
Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
1000 Vrms typical isolation between windings.
Electrical specifications at 25°C.
Typical Attenuation
Typical Impedance
BU9
0.43
max
11,0
Dot
indicates
pin 1
0.69 max
17,5
BU9H
0.61 max
15,5
0.69 max
17,5
0.157 ±0.04
4,0 ±1,0
1
0.67
max
17,0
2
1
0.157 ±0.04
4,0 ±1,0
Dot
indicates
1
pin 1
0.31 ±0.02
8,0 ±0,5
1
4
0.49
max
12,5
2
1
4
0.276 ±0.02
7,0 ±0,5
2
3
0.31 ±0.02
8,0 ±0,5
1
4
0.024
Æ
0,6
0.276 ±0.02
7,0 ±0,5
0.43
max
11,0
2
1
3
0.024
Æ
0,6
4
0.276 ±0.02
7,0 ±0,5
1
4
2
3
0.276 ±0.02
7,0 ±0,5
4
0.31 ±0.02
8,0 ±0,5
Recommended
Board Layout
0.040
Æ
1,0
0.31 ±0.02
8,0 ±0,5
1
4
2
3
Recommended
Board Layout
0.040
Æ
1,0
2
3
1
4
2
3
Specifications subject to change without notice.
Please check our website for latest information.
Document 260-2
Revised 09/09/09
© Coilcraft, Inc. 2009
Document 260-3
Common Mode Chokes - BU9S, BU9HS Series
Part number
BU9S-153R15BL
BU9S-7020R3BL
BU9HS-153R15BL
BU9HS-7020R3BL
1.
2.
3.
4.
Impedance max
(kOhms)
71 @ 210 kHz
66 @ 330 kHz
71 @ 210 kHz
66 @ 330 kHz
Frequency range
@ 75% of
impedance max
190 – 230 kHz
300 – 360 kHz
190 – 230 kHz
300 – 360 kHz
DCR
1
(Ohms)
5.0
2.5
5.0
2.5
Current
max (Aac)
0.15
0.30
0.15
0.30
Inductance
2
L1, L2
min (mH)
15.0
7.0
15.0
7.0
Inductance difference
L1 - L2
max (µH)
300
200
300
200
DCR is per winding
Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
1000 Vrms typical isolation between windings.
Electrical specifications at 25°C.
Typical Attenuation
Typical Impedance
BU9S
0.43
max
11,0
Dot
indicates
pin 1
0.69 max
17,5
BU9HS
0.61
max
15,5
0.69 max
17,5
0.157 ±0.04
4,0 ±1,0
0.67
max
17,0
0.157 ±0.04
4,0 ±1,0
0.49
max
12,5
2
1
1
4
2
1
1
4
0.276 ±0.02
7,0 ±0,5
0.024
Æ
0,6
1
0.31 ±0.02
8,0 ±0,5
4
0.276 ±0.02
7,0 ±0,5
0.43
max
11,0
Dot
indicates
pin 1
0.31 ±0.02
8,0 ±0,5
0.024
Æ
0,6
1
2
1
3
4
4
2
1
3
0.276 ±0.02
7,0 ±0,5
4
0.276 ±0.02
7,0 ±0,5
2
3
0.31 ±0.02
8,0 ±0,5
0.040
Æ
1,0
2
3
0.31 ±0.02
8,0 ±0,5
Recommended
Board Layout
1
2
4
3
Recommended
Board Layout
0.040
Æ
1,0
1
2
4
3
Specifications subject to change without notice.
Please check our website for latest information.
Document 260-3
Revised 09/09/09
© Coilcraft, Inc. 2009
Document 260-4
Common Mode Chokes - BU10 Series
Part number
BU10-1811R2BL
BU10-1311R6BL
BU10-1012R2BL
BU10-6003R0BL
1.
2.
3.
4.
Impedance max
(kOhms)
3.9 @ 1.8 MHz
2.2 @ 2.2 MHz
1.6 @ 3.1 MHz
1.0 @ 3.0 MHz
Frequency range
@ 75% of
impedance max
1000 – 3200 kHz
800 – 2000 kHz
1300 – 8900 kHz
800 – 10000 kHz
DCR
1
(Ohms)
0.20
0.12
0.08
0.04
Current
max (Aac)
1.20
1.60
2.20
3.00
Inductance
2
L1, L2
min (mH)
0.18
0.13
0.10
0.06
Inductance difference
L1 - L2
max (µH)
30
20
15
10
DCR is per winding
Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
1000 Vrms typical isolation between windings.
Electrical specifications at 25°C.
Typical Attenuation
Typical Impedance
0.67 max
17,0
Dot
indicates
pin 1
0.177 ±0.04
4,5 ±1,0
0.89
max
22,5
2
0.028
Æ
0,7
0.394 ±0.02
10,0 ±0,5
1
1
0.51 ±0.02
13,0 ±0,5
0.75
max
19,0
1
4
4
Recommended
Board Layout
2
3
0.394 ±0.02
10,0 ±0,5
1
4
0.51 ±0.02
13,0 ±0,5
0.047
Æ
1,2
1
4
2
3
2
3
Specifications subject to change without notice.
Please check our website for latest information.
Document 260-4
Revised 09/09/09
© Coilcraft, Inc. 2009
Document 260-5
Common Mode Chokes - BU15 Series
Part number
BU15-4530R4BL
BU15-1430R7BL
BU15-7521R0BL
BU15-4421R3BL
BU15-2721R6BL
1.
2.
3.
4.
Impedance max
(kOhms)
400 @ 230 kHz
115 @ 470 kHz
60 @ 600 kHz
36 @ 670 kHz
20 @ 1000 kHz
Frequency range
@ 75% of
impedance max
140 – 160 kHz
400 – 650 kHz
420 – 720 kHz
430 – 1000 kHz
510 – 1400 kHz
DCR
1
(Ohms)
3.0
1.0
0.6
0.3
0.2
Current
max (Aac)
0.40
0.70
1.00
1.30
1.60
Inductance
2
L1, L2
min (mH)
45.0
14.0
7.5
4.4
2.7
Inductance difference
L1 - L2
max (µH)
300
300
150
100
60
DCR is per winding
Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
1000 Vrms typical isolation between windings.
Electrical specifications at 25°C.
Typical Attenuation
Typical Impedance
0.75
max
19,0
Dot
indicates
pin 1
0.91
max
23,0
0.177 ±0.04
4,5 ±1,0
1.08
max
27,5
2
0.028
Æ
0,7
1
1
0.51 ±0.02
13,0 ±0,5
4
0.40 ±0.02
10,0 ±0,5
1
4
Recommended
Board Layout
2
3
0.40 ±0.02
10,0 ±0,5
1
4
0.047
Æ
1,2
1
4
2
3
2
3
0.51 ±0.02
13,0 ±0,5
Specifications subject to change without notice.
Please check our website for latest information.
Document 260-5
Revised 09/09/09
© Coilcraft, Inc. 2009
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