FR
EE
Features
7.6
MAX.
(.299)
CO
M
P
AE LIAN
C T,
CO *
M *H
PL AL
IA O
NT GE
N
■
Multiple applications: parallel, series, dual-inductor and transformer
■
Magnetically shielded, low radiation
■
Inductance range: 0.47 to 4000
μH
■
7.6
Rated current up to 17.9 A
■
(.299)
AEC-Q200 compliant
MAX.
*R
oH
S
101
&
■
RoHS compliant* and halogen free**
SRF1280A Series - Dual-Winding Shielded Power Inductors
3.4 ± 0.2
(.134 ± .008)
TYP.
Parallel Rating
(.114)
4
3
DCR
Inductance
Inductance
(Ω)
Irms Isat
@ 100 KHz
Bourns
@ 100 KHz
Tol.
L (μH)
(%)
Max.
(A)
(A)
L (μH)
Part No.
2.7
± 30
SRF1280A-R47Y
0.47
0.0055 17.9
56
1.88
(.106)
SRF1280A-1R0Y
1.0
± 30 0.0067 15.5
40
4
TYP.
SRF1280A-1R5Y
1.5
± 30 0.0076 13.5 31.1
6
SRF1280A-2R2Y
2.2
± 30 0.0092 12.5 25.5
8.8
SRF1280A-3R3Y
3.3
± 30
0.011
2
10.4 21.5
13.2
1
1.0
SRF1280A-4R7Y
4.7
± 30 0.0135 8.25
TYP.
16.5
18.8
(.039)
SRF1280A-6R8Y
6.8
± 30 0.0183 7.34 13.3
27.2
SRF1280A-8R2Y
8.2
± 30
12.50
0.0191 6.32 12.2
32.8
MAX.
SRF1280A-100M
10
± 20
(.492)
0.0241 6.04 11.2
40
SRF1280A-150M
15
± 20 0.0333 5.03 9.66
60
DOT
0.4
0.4
3.0
SRF1280A-220M
22
± 20 0.0503
4
7.57
88
INDICATES
(.016)
(.016)
(.118)
SRF1280A-330M
33
± 20 0.0664 3.23 6.22
132
TERMINAL 1
SRF1280A-470M
47
± 20
2
0.0898 2.95
12.50
5.28
188
2
1
1
(.492)
SRF1280A-680M
68
± 20
0.123
2.44 4.44
272
MAX.
SRF1280A-820M
82
± 20
0.153
2.09 4.06
328
7.9
(.311)
1.96
SRF1280A-101M
100
± 20
0.175
3.64
400
SRF1280A-151M
150
± 20
0.261
1.59 3.01
600
4
4
3
3
SRF1280A-221M
220
± 20
0.343
1.29 2.43
880
1.4
SRF1280A-331M
1.4
330
± 20
0.54
1.04 2.01
1320
(.055)
(.055)
SRF1280A-471M
470
± 20
0.865
0.85 1.68
1880
DUAL INDUCTOR MODE
SERIES MODE
8.00
SRF1280A-681M
680
± 20
1.296
0.76 1.39
2720
MAX.
(.315)
SRF1280A-821M
820
± 20
1.632
0.65 1.27
3280
SRF1280A-102M
1000
± 20
1.992
0.61 1.14
4000
2.9
Series Rating
Tol.
(%)
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 20
± 20
±
3.0
20
(.118)
± 20
± 20
± 20
±
7.9
20
(.311)
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
DCR
(Ω)
Max.
0.0216
0.026
0.0306
0.0338
0.04
0.05
0.0656
0.0714
0.0921
0.129
0.192
0.265
0.353
0.469
0.578
0.701
1.013
1.38
2.172
3.3
4.888
5.896
7.202
Irms
(A)
8.94
7.74
6.77
6.23
5.23
4.13
3.67
3.16
3.02
2.51
2
1.61
1.47
1.22
1.04
0.98
0.796
0.645
0.522
0.427
0.38
0.325
0.307
Isat
(A)
28
20
15.6
12.7
10.8
8.24
6.67
6.09
5.6
4.83
3.78
3.11
2.64
2.22
2.03
1.82
1.51
1.22
1.01
0.838
0.697
0.633
0.571
Test Voltage ..................................0.25 V
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Solder Heat
............................. +245 °C for 10 sec.
Temperature Rise
.......................40 °C typ. at rated
I
rms
Inductance drop ...................30 % at Isat
Hi-pot (N1-N2) ................500 Vac/60 Hz,
3 mA, 1 sec
Moisture Sensitivity Level .....................1
................. N/A
Materials
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................... 400 pcs. per reel
Product Dimensions
12.50
MAX.
(.492)
Electrical Schematic
1
5.00 ± 0.3
(.197 ± .012)
2
4
1
3
5.00 ± 0.3
(.197 ± .012)
2
1
2
12.50
(.492)
MAX.
N1
N2
N1
N2
N1
N2
8.00
MAX.
(.315)
3
4
3
1
2
PARALLEL
4
1.80 ± 0.2
(.071 ± .008)
3
4
SERIES
5.00 ± 0.3
(.197 ± .012)
Recommended Layout
2.15
(.085)
4.50
(.177)
2.15
(.085)
4.50
(.177)
5.00 ± 0.3
(.197 ± .012)
1
2
1
2
13.00
(.512)
1
2
13.00
(.512)
4
MM
(INCHES)
3
1.80 ± 0.2
(.071 ± .008)
4
1.28
(.050)
3
4
1.28
(.050)
3
DIMENSIONS:
DIMENSIONS:
MM
(INCHES)
DUAL INDUCTOR MODE
SERIES MODE
2.15
(.085)
How to Order
Model
4.50
(.177)
SRF1280A - 100M
2.15
(.085)
2
Value Code (see table)
2
1
1
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less;
13.00
(.512)
(b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
3
4
3
4
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
its affiliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
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and complete before placing orders for Bourns
®
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The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
product in a user application may vary
from the data sheet characteristics and parameters due to (i) the combination of the Bourns
®
product with other components
in the user’s application, or (ii) the environment of the user application itself. The characteristics and parameters of a Bourns
®
product also can and do vary in different applications and actual performance may vary over time. Users should always verify
the actual performance of the Bourns
®
product in their specific devices and applications, and make their own independent
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differences between laboratory and real world conditions.
Unless Bourns has explicitly designated an individual Bourns
®
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®
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®
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®
products are not recommended, authorized or intended for use in nuclear, lifesaving, life-critical or life-sustaining
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®
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®
standard products that are suitable for use in automotive applications on such
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®
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®
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®
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The use and level of testing applicable to Bourns
®
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and the user for which such Bourns
®
custom products are specially designed. Absent a written agreement between Bourns
and the user regarding the use and level of such testing, the above provisions applicable to Bourns
®
standard products shall
also apply to such Bourns
®
custom products.
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®
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Bourns
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®
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®
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bilingual versions are available at:
Web Page:
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PDF:
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C1753 05/17/18R
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