PL
IA
NT
Features
7.6
MAX.
(.299)
Applications
n
SEPIC topology
101
F
RE
E
n
Multiple applications: parallel, series,
dual-inductor and transformer
n
Magnetically shielded, low radiation
n
Inductance range: 0.47 to 4000 μH
7.6
(.299)
n
MAX.
Rated current up to 17.9 A
n
RoHS compliant*
C
OM
*R
oH
S
n
Power supplies for:
- Communication equipment
- Notebooks, desktop computers,
servers
- LCDs, flat panels, backlights
- Camcorders, HDTVs, car audio
systems
LE
AD
SRF1280 Series - Dual-Winding Shielded Power Inductors
3.4 ± 0.2
(.134 ± .008)
Electrical Specifications @ 25 °C
Inductance
@ 100 KHz
General Specifications
Ro VE LEA
HS RS D
C ION FRE
OM S E
PL AR
IA E
NT
*
2.9
TYP.
(.114)
Parallel Rating
Bourns
Part No.
L (μH)
Tol.
(%)
SRF1280-R47Y
0.47
(.106)
±30 0.0055
17.9
56
1.88
SRF1280-1R0Y
1.0
TYP.
±30
0.0067
15.5
40
4
SRF1280-1R5Y
1.5
±30
0.0076
13.5 31.1
6
4
SRF1280-2R2Y
2.2
±30
0.0092
3
12.5 25.5
8.8
SRF1280-3R3Y
3.3
±30 0.011 10.4 21.5
13.2
1.0
TYP.
(.039)
SRF1280-4R7Y
4.7
±30 0.0135
8.25
16.5
18.8
SRF1280-6R8Y
6.8
±30
0.0183 7.34
13.3
27.2
SRF1280-8R2Y
8.2
±30
0.0191
6.32 12.2
32.8
SRF1280-100M
10
±20
12.50 MAX.
6.04 11.2
0.0241
40
(.492)
SRF1280-150M
15
±20 0.0333 5.03
9.66
60
0.4
0.4
1.73
SRF1280-220M
(.016)
22
±20 0.0503
4
(.016)
7.57
88
(.068)
SRF1280-330M
33
±20 0.0664 3.23 6.22
132
2
47
SRF1280-470M
±20
1
0.0898 2.95
2
5.28
188
1
12.50
SRF1280-680M
68
±20 0.123 2.44
(.492)
4.44
272
7.9
MAX.
SRF1280-820M
82
±20 0.153
2.09
4.06
328
(.311)
SRF1280-101M
100
±20
0.175 1.96
3.64
400
4
0.261
1.59
3
3
150
SRF1280-151M
±20
3.01
600
4
SRF1280-221M
1.0
220
±20 0.343
1.29
2.43
880
1.0
(.039)
330
(.039)
SRF1280-331M
±20
0.54
1.04 2.01
1320
DUAL INDUCTOR MODE
SRF1280-471M
470
±20
0.865 0.85 1.68
SERIES MODE
1880
8.00
SRF1280-681M
680
±20
1.296 0.76 1.39
MAX.
2720
(.315)
SRF1280-821M
820
±20 1.632 0.65
1.27
3280
SRF1280-102M
1000
±20
1.992
0.61 1.14
4000
2.7
DCR
1
2
Irms
(W)
Max.
(A)
Series Rating
Inductance
@ 100 KHz
Isat
(A)
L (μH)
±30
±30
±30
±30
±30
±30
±30
±30
±20
±20
1.73
±20
(.068)
±20
±20
±20
7.9
±20
(.311)
±20
±20
±20
±20
±20
±20
±20
±20
Tol.
(%)
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
DCR
(W)
Max.
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
Irms
(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
Isat
(A)
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
5.00 ± 0.3
2
(.197 ± .012)
5.00 ± 0.3
(.197 ± .012)
Product Dimensions
1
2
12.50
MAX.
(.492)
1
1
N1
2
N2
2
N1
N2
N1
N2
12.50
(.492)
MAX.
4
3
4
3
3
4
1.80 ± 0.2
(.071 ± .008)
3
4
PARALLEL
SERIES
Recommended Layout
2.15
(.085)
4.50
(.177)
2.15
(.085)
4.50
(.177)
8.00
MAX.
(.315)
2
1
13.00
(.512)
2
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.
2.15
4.50
(.177)
2.15
4.50
(.177)
SRF0504 Series - Line Filter
SRF1280 Series - Dual-Winding Shielded Power Inductors
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)
16.0
(.630)
24.0
(.945)
END
4.0
(.157)
START
NO COMPONENT
200
(7.87)
COMPONENTS
NO COMPONENT
400
(15.75)
USER DIRECTION OF FEED
QTY: 400 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
REV. 11/16
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.
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