M
PL
IA
NT
Features
■
Multiple applications: parallel, series,
Applications
■
SEPIC topology
■
Power supplies for:
101
■
■
■
■
dual-inductor and transformer
Magnetically shielded, low radiation
Inductance range: 0.47 to 4000
μH
Rated current up to 17.9 A
RoHS compliant*
*R
oH
S
CO
- Communication equipment
- Notebooks, desktop computers,
servers
- LCDs, flat panels, backlights
- Camcorders, HDTVs, car audio
systems
SRF1280 Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
Parallel Rating
Bourns
Part No.
Inductance
@ 100 KHz
General Specifications
Series Rating
Irms
(A)
Isat
(A)
Inductance
@ 100 KHz
L (μH)
Tol.
(%)
DCR
(Ω)
Max.
L (μH)
Tol.
(%)
DCR
(Ω)
Max.
Irms
(A)
Isat
(A)
SRF1280-R47Y
SRF1280-1R0Y
SRF1280-1R5Y
SRF1280-2R2Y
SRF1280-3R3Y
SRF1280-4R7Y
SRF1280-6R8Y
SRF1280-8R2Y
SRF1280-100M
SRF1280-150M
SRF1280-220M
SRF1280-330M
SRF1280-470M
SRF1280-680M
SRF1280-820M
SRF1280-101M
SRF1280-151M
SRF1280-221M
SRF1280-331M
SRF1280-471M
SRF1280-681M
SRF1280-821M
SRF1280-102M
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
0.0055
0.0067
0.0076
0.0092
0.011
0.0135
0.0183
0.0191
0.0241
0.0333
0.0503
0.0664
0.0898
0.123
0.153
0.175
0.261
0.343
0.54
0.865
1.296
1.632
1.992
17.9
15.5
13.5
12.5
10.4
8.25
7.34
6.32
6.04
5.03
4
3.23
2.95
2.44
2.09
1.96
1.59
1.29
1.04
0.85
0.76
0.65
0.61
56
40
31.1
25.5
21.5
16.5
13.3
12.2
11.2
9.66
7.57
6.22
5.28
4.44
4.06
3.64
3.01
2.43
2.01
1.68
1.39
1.27
1.14
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
0.0216
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
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
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
Hi-pot .................500 Vrms, 3 mA, 3 sec.
Reflow Soldering .. 230 °C; 50 sec. max.
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Resistance to Solder Heat
...............................+260 °C for 10 sec.
Materials
Core ..............................................Ferrite
Wire ............................Enameled copper
Base ................................................ LCP
Adhesive .............................. Epoxy resin
Terminal ..............................................Sn
Rated Current
............ Inductance drops 30 % at Isat
Temperature Rise .....40 °C at rated Irms
Packaging ....... 400 pcs. per 13-inch reel
How to Order
SRF1280 - 100M
Model
Value Code (see table)
Electrical Schematic
1
2
1
2
1
2
Product Dimensions
12.50
MAX.
(.492)
N1
N2
N1
N2
N1
N2
12.50
(.492)
MAX.
3
4
3
4
3
4
PARALLEL
SERIES
Recommended Layout
2.15
(.085)
4.50
(.204)
2.15
(.085)
4.50
(.204)
8.00
MAX.
(.315)
2
2
1
13.00
(.512)
1
13.00
(.512)
DIMENSIONS:
MM
(INCHES)
5.00 ± 0.3
(.197 ± .012)
5.00 ± 0.3
(.197 ± .012)
1
2
3
1.28
(.050)
4
1.28
(.050)
3
4
DUAL INDUCTOR MODE
SERIES MODE
4
3
1.80 ± 0.2
(.071 ± .008)
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
SRF0504
Series - Dual-Winding Shielded Power Inductors
SRF1280
Series - Line Filter
Packaging Specifications
330
DIA.
(12.99)
2.0
±
0.5
(.079
±
.020)
30.4
(1.197)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0 -0
(1.97 -0)
21.0
±
0.8
(.827
±
.031)
13.0
DIA.
(.512)
26 +0
(1.024 +0)
24.0
(.945)
END
16.0
(.630)
4.0
(.157)
START
NO COMPONENT
COMPONENTS
NO COMPONENT
200
(7.87)
400
(15.75)
USER DIRECTION OF FEED
QTY: 400 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
Asia-Pacific:
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe:
Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas:
Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
REV. 06/13
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
FPGA/CPLD
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