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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 significant
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 termina-
tions 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: 6.3 – 6.9 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.
Tray 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
Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See
Doc787_PCB_Washing.pdf.
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 260-1
Revised 09/12/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 260-2
Common Mode Chokes - BU9S, BU9HS Series
Part number
Common mode
peak impedance
(kOhms)
Inductance
1
min (mH)
DCR
2
(Ohms)
Isolation
3
(Vrms)
Current
max (A)
BU9S-153R15BL
BU9S-7020R3BL
BU9HS-153R15BL
BU9HS-7020R3BL
105.7 @
59.8 @
146.5 @
61.9 @
200 kHz
370 kHz
220 kHz
380 kHz
15.0
7.0
15.0
7.0
5.0
2.5
5.0
2.5
1000
1000
1000
1000
0.15
0.30
0.15
0.30
1. Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
2. DCR is per winding
3. Interwinding isolation (hipot) tested for one minute.
4. Electrical specifications at 25°C.
BU9S
0.43
max
11,0
Dot
indicates
pin 1
0.69 max
17,5
BU9HS
0.61
max
15,5
0.157 ±0.04
4,0 ±1,0
1
1
4
0.69 max
17,5
0.49
max
12,5
0.157 ±0.04
4,0 ±1,0
2
1
4
0.67
max
17,0
1
2
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
4
0.024
Æ
0,6
1
2
1
3
4
2
1
3
4
0.276 ±0.02
7,0 ±0,5
0.040
Æ
1,0
2
3
0.276 ±0.02
7,0 ±0,5
2
3
0.31 ±0.02
8,0 ±0,5
Recommended
Board Layout
0.31 ±0.02
8,0 ±0,5
1
2
4
3
Recommended
Board Layout
0.040
Æ
1,0
1
2
4
3
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 260-2
Revised 09/12/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 260-3
Common Mode Chokes - BU9, BU9H Series
Part number
Common mode
peak impedance
(kOhms)
Inductance
1
min (mH)
DCR
2
(Ohms)
Isolation
3
(Vrms)
Current
max (A)
BU9-103R25BL
BU9-2820R5BL
BU9-1320R7BL
BU9-6011R0BL
BU9-2011R6BL
BU9H-103R25BL
BU9H-2820R5BL
BU9H-1320R7BL
BU9H-6011R0BL
BU9H-2011R6BL
123.5 @
25.12 @
17.33 @
5.43 @
3.62 @
148.2 @
29.76 @
12.31 @
5.47 @
4.43 @
250 kHz
660 kHz
910 kHz
2100 kHz
4000 kHz
230 kHz
600 kHz
980 kHz
2000 kHz
2700 kHz
10.0
2.8
1.3
0.6
0.2
10.0
2.8
1.3
0.6
0.2
3.5
1.0
0.5
0.2
0.1
3.5
1.0
0.5
0.2
0.1
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
0.25
0.50
0.70
1.00
1.60
0.25
0.50
0.70
1.00
1.60
1. Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
2. DCR is per winding
3. Interwinding isolation (hipot) tested for one minute.
4. Electrical specifications at 25°C.
BU9
0.43
max
11,0
Dot
indicates
pin 1
BU9H
0.69 max
17,5
0.61 max
15,5
0.69 max
17,5
0.49
max
12,5
Dot
indicates
1
pin 1
4
0.157 ±0.04
4,0 ±1,0
2
1
1
4
0.67
max
17,0
2
1
0.157 ±0.04
4,0 ±1,0
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
4
0.31 ±0.02
8,0 ±0,5
4
0.024
Æ
0,6
1
0.276 ±0.02
7,0 ±0,5
2
3
1
4
0.276 ±0.02
7,0 ±0,5
0.040
Æ
1,0
2
3
0.31 ±0.02
8,0 ±0,5
Recommended
Board Layout
Dimensions are in
inches
mm
0.040
Æ
1,0
0.31 ±0.02
8,0 ±0,5
1
4
2
3
Recommended
Board Layout
Dimensions are in
inches
mm
1
4
2
3
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 260-3
Revised 09/12/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 260-4
Common Mode Chokes - BU10 Series
Part number
Common mode
peak impedance
(kOhms)
Inductance
1
min (mH)
DCR
2
(Ohms)
Isolation
3
(Vrms)
Current
max (A)
BU10-1811R2BL
BU10-1311R6BL
BU10-1012R2BL
BU10-6003R0BL
5.27 @
3.60 @
1.88 @
1.15 @
1200 MHz
1200 MHz
1500 MHz
2100 MHz
0.18
0.13
0.10
0.06
0.20
0.12
0.08
0.04
1000
1000
1000
1000
1.20
1.60
2.20
3.00
1. Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
2. DCR is per winding
3. Interwinding isolation (hipot) tested for one minute.
4. Electrical specifications at 25°C.
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
Dimensions are in
inches
mm
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 260-4
Revised 09/12/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 260-5
Common Mode Chokes - BU15 Series
Part number
Common mode
peak impedance
(kOhms)
Inductance
1
min (mH)
DCR
2
(Ohms)
Isolation
3
(Vrms)
Current
max (A)
BU15-4530R4BL
BU15-1430R7BL
BU15-7521R0BL
BU15-4421R3BL
BU15-2721R6BL
398.7 @
70.58 @
43.05 @
41.14 @
32.22 @
130 kHz
240 kHz
340 kHz
510 kHz
620 kHz
45.0
14.0
7.5
4.4
2.7
3.0
1.0
0.6
0.3
0.2
1000
1000
1000
1000
1000
0.40
0.70
1.00
1.30
1.60
1. Inductance tested at 1 kHz, 1 Vrms, 0 Adc on an Agilent/HP 4284A LCR-meter or equivalent.
2. DCR is per winding
3. Interwinding isolation (hipot) tested for one minute.
4. Electrical specifications at 25°C.
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
0.40 ±0.02
10,0 ±0,5
1
1
0.51 ±0.02
13,0 ±0,5
1
4
4
Recommended
Board Layout
2
1
3
4
0.047
Æ
1,2
0.40 ±0.02
10,0 ±0,5
1
4
2
3
2
3
0.51 ±0.02
13,0 ±0,5
Dimensions are in
inches
mm
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 260-5
Revised 09/12/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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