Features
Applications
■ DC/DC converters
■ Power supplies
■ Multiple applications: parallel, series,
dual-inductor and transformer
■ Magnetically shielded, low radiation
■ Inductance range: 0.47 to 4000 μH
■ Heating current up to 17.6 A
■ SEPIC - DC/DC converters
220
■ AEC-Q200 compliant
■ RoHS compliant* and halogen free**
SRF1260A Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
General Specifications
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Parallel Rating
Inductance
Series Rating
DCR
Inductance
@ 100 KHz/
0.25 V
@ 100 KHz/
0.25 V
L (μH)
DCR
(Ω)
Max.
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
Bourns
Part No.
Tol.
(%)
Irms Isat
Tol.
(%)
(Ω)
Max.
Irms
(A)
Isat
(A)
(A)
(A)
L (μH)
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
0.47
1.0
1.5
2.2
3.3
4.7
6.8
8.2
10
±30 0.0053 17.6
±30 0.0062 15
33
1.88
4
±30 0.0212 8.8
16.5
23.6
±30 0.026 7.51 11.8
±30 0.0302 6.89 9.15
±30 0.0073 13.8 18.3
±30 0.0085 10.9 15
6
8.8
±30 0.0333 5.46
7.5
±30 0.0101 9.26 12.7
±30 0.0137 7.18 9.71
±30 0.0186 6.64 8.68
±30 0.0194 5.54 7.86
±20 0.0246 5.35 7.17
±20 0.0329 4.27 5.69
±20 0.0451 3.7 4.71
±20 0.0618 3.28 3.84
±20 0.086 2.71 3.24
±20 0.117 2.22 2.7
13.2
18.8
27.2
32.8
40
±30 0.0372 4.63 6.35
±30 0.0479 3.59 4.86
±30 0.0672 3.32 4.34
±30 0.0737 2.77 3.93
±20 0.0934 2.67 3.59
±20 0.125 2.13 2.85
±20 0.172 1.84 2.36
±20 0.256 1.64 1.92
Materials
Core..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging.................... 400 pcs. per reel
15
60
22
88
33
132
188
272
328
400
600
880
1320
1880
2720
3280
4000
47
±20 0.34
±20 0.444 1.11 1.35
±20 0.568 1.03 1.2
1.35 1.62
Product Dimensions
68
82
±20 0.15
2.05 2.39
12.50
MAX.
(.492)
100
150
220
330
470
680
820
1000
±20 0.171 1.78 2.2
±20 0.254 1.48 1.81
±20 0.354 1.19 1.51
±20 0.574 1.06 1.22
±20 0.656 0.892 1.1
±20 0.972 0.739 0.905
±20 1.416 0.594 0.755
DOT
INDICATES
TERMINAL 1
±20 2.29
0.53 0.61
12.50
(.492)
MAX.
±20 0.83
±20 1.212
±20 1.46
0.87 1.02
0.7 0.85
0.6 0.77
±20 3.197 0.434 0.51
±20 4.635 0.35 0.425
±20 5.363 0.301 0.385
±20 6.782 0.283 0.35
±20 1.854 0.57 0.7
Electrical Schematics
6.00 0.2
(.236 .008)
1
2
1
2
1
2
5.00 0.3
(.197 .012)
N1
N2
N1
N2
N1
N2
3
2
4
5.00 0.3
(.197 .012)
3
4
3
4
3
4
PARALLEL
SERIES
Recommended Layout
4.50
4.50
(.177)
1
2.15
(.085)
2.15
(.085)
1.80 0.2
(.071 .008)
(.177)
1
2
3
1
2
3
MM
(INCHES)
MM
(INCHES)
DIMENSIONS:
DIMENSIONS:
13.00
(.512)
13.00
(.512)
4
4
WARNING
1.28
(.050)
1.28
(.050)
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
RoHS Directive 2015/863, Mar 31, 2015 and Annex.
DUAL INDUCTOR MODE
SERIES MODE
*
**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.
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.
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