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Features
Applications
■ Multiple applications: parallel, series,
■ DC/DC converters
■
220
■
■
■
■
dual-inductor and transformer
Magnetically shielded, low radiation
Inductance range: 0.47 to 4000 μH
Heating current up to 17.6 A
AEC-Q200 compliant
RoHS compliant* and halogen free**
■ Power supplies
■ SEPIC - DC/DC converters
SRF1260A Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
General Specifications
Parallel Rating
Inductance
@ 100 KHz/
Tol.
0.25 V
Bourns
Part No.
SRF1260A-R47Y
SRF1260A-1R0Y
SRF1260A-1R5Y
SRF1260A-2R2Y
SRF1260A-3R3Y
SRF1260A-4R7Y
SRF1260A-6R8Y
SRF1260A-8R2Y
SRF1260A-100M
SRF1260A-150M
SRF1260A-220M
SRF1260A-330M
SRF1260A-470M
SRF1260A-680M
SRF1260A-820M
SRF1260A-101M
SRF1260A-151M
SRF1260A-221M
SRF1260A-331M
SRF1260A-471M
SRF1260A-681M
SRF1260A-821M
SRF1260A-102M
L (μH)
(%)
DCR
(Ω)
Max.
0.47
1.0
1.5
2.2
3.3
4.7
6.8
8.2
10
15
22
33
47
68
82
100
150
220
330
470
680
820
1000
±30
±30
±30
±30
±30
±30
±30
±30
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
0.0053
0.0062
0.0073
0.0085
0.0101
0.0137
0.0186
0.0194
0.0246
0.0329
0.0451
0.0618
0.086
0.117
0.15
0.171
0.254
0.354
0.574
0.83
1.212
1.46
1.854
Series Rating
Irms
(A)
Isat
(A)
17.6
15
13.8
10.9
9.26
7.18
6.64
5.54
5.35
4.27
3.7
3.28
2.71
2.22
2.05
1.78
1.48
1.19
1.06
0.87
0.7
0.6
0.57
33
23.6
18.3
15
12.7
9.71
8.68
7.86
7.17
5.69
4.71
3.84
3.24
2.7
2.39
2.2
1.81
1.51
1.22
1.02
0.85
0.77
0.7
Inductance
@ 100 KHz/
Tol.
0.25 V
L (μH)
(%)
DCR
(Ω)
Max.
1.88
4
6
8.8
13.2
18.8
27.2
32.8
40
60
88
132
188
272
328
400
600
880
1320
1880
2720
3280
4000
±30
±30
±30
±30
±30
±30
±30
±30
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
0.0212
0.026
0.0302
0.0333
0.0372
0.0479
0.0672
0.0737
0.0934
0.125
0.172
0.256
0.34
0.444
0.568
0.656
0.972
1.416
2.29
3.197
4.635
5.363
6.782
Irms
(A)
Isat
(A)
8.8
7.51
6.89
5.46
4.63
3.59
3.32
2.77
2.67
2.13
1.84
1.64
1.35
1.11
1.03
0.892
0.739
0.594
0.53
0.434
0.35
0.301
0.283
16.5
11.8
9.15
7.5
6.35
4.86
4.34
3.93
3.59
2.85
2.36
1.92
1.62
1.35
1.2
1.1
0.905
0.755
0.61
0.51
0.425
0.385
0.35
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Temperature Rise
......................40 °C typ. at rated I rms
Inductance Drop .......... 30 % typ. at I sat
Hi-pot (N1-N2) ................500 Vac/60 Hz,
3 mA, 1 sec
Moisture Sensitivity Level ..................... 1
ESD Classification (HBM)................. N/A
Materials
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................... 400 pcs. per reel
Product Dimensions
12.50
MAX.
(.492)
DOT
INDICATES
TERMINAL 1
12.50
(.492)
MAX.
Electrical Schematics
1
2
N1
N2
1
2
N1
1
N2
6.00 ± 0.2
(.236 ± .008)
2
N1
N2
5.00 ± 0.3
(.197 ± .012)
3
4
3
4
4
3
1
2
5.00 ± 0.3
(.197 ± .012)
4
3
PARALLEL
SERIES
Recommended Layout
4.50
(.177)
2.15
(.085)
1
2
4.50
(.177)
2.15
(.085)
1
2
13.00
(.512)
13.00
(.512)
4
3
1.28
(.050)
DUAL INDUCTOR MODE
4
DIMENSIONS:
MM
(INCHES)
3
1.28
(.050)
SERIES MODE
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.
DIMENSIONS:
1.80 ± 0.2
(.071 ± .008)
MM
(INCHES)
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if
(a) the Bromine (Br) content is 900 ppm or less; (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.
SRF1260A Series - Dual-Winding Shielded Power Inductors
Soldering Profile
How to Order
SRF1260A - 100M
Peak Temperature 245 max.
Max. Peak Temperature -5
30 sec. max.
Max. Time Above 217 : 60~150 sec. max.
Model
Value Code (see table)
Temperature
Rising Area
Preheat
Area
Reflow
Area
Forced
Cooling Area
+4.0 °C/Sec. Max.
150~200 °C / 60~120 Sec.
+3.0 °C/Sec. Max.
-(1.0~5.0) °C/Sec. Max.
Peak Temperature: 245 °C
Temperature (°C)
250
217 °C
60~150 Sec.
200
60 Sec.
Max.
150
60~120 Sec.
100
50
50
0
100
150
200
250
Time (Seconds)
Packaging Specifications
330
DIA.
(12.99)
2.0 ± 0.5
(.079 ± .020)
21.0 ± 0.8
(.827 ± .031)
30.4
(1.197)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0 -0
(1.97 -0)
13.0 ± 0.5
DIA.
(.512 ± .020)
26 +0
(1.024 +0)
16.0
(.630)
END
NO COMPONENT
24.0
(.945)
4.0
(.157)
COMPONENTS
START
NO COMPONENT
400
(15.75)
400
(15.75)
USER DIRECTION OF FEED
QTY: 400 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
REV. 11/19
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.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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