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SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)
Conformity to RoHS Directive
SLF Series SLF7028
FEATURES
• The SLF series are characterized by low profile, low DC
resistance, and high current handling capacities.
• Because they are magnetically shielded, these parts can be
used in high-density mounting configurations.
• Flat bottom surface ensures secure, reliable mounting.
• Provided in embossed carrier tape packaging for use with
automatic mounting machines.
PRODUCT IDENTIFICATION
APPLICATIONS
Portable telephones, personal computers, hard disk drives, and
other electronic equipment.
(3) Packaging style
SLF 7028 T- 3R3 M 1R6 - PF
(1) (2) (3) (4) (5) (6) (7)
(1) Series name
(2) Dimensions
7028
T
7.0× 7.0× 2.8mm (L× W× T)
Taping(reel)
(4) Inductance value
SPECIFICATIONS
Operating temperature range
Storage temperature range
–20 to +85°C
[Including self-temperature rise]
–40 to +85°C[Unit of products]
3R3
100
3.3µH
10µH
(5) Inductance tolerance
M
±20%
RECOMMENDED REFLOW SOLDERING CONDITIONS
(6) Rated current
5s
250±5˚C
Natural
cooling
230˚C
1R6
R88
1.6A
0.88A
30s
(7) Lead-free compatible product
PF
180˚C
Lead-free compatible product
150˚C
120s
Preheating
PACKAGING STYLE AND QUANTITIES
Packaging style
Taping
Quantity
1000 pieces/reel
Time (s)
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
• All specifications are subject to change without notice.
002-05 / 20070516 / e531_slf7028.fm
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SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PATTERN
2.8±0.2
0.1typ.
4.9 1.5
2.2
1.5
Marking
(Inductance code)
2±0.1
4.9typ.
470
7±0.2
7±0.2
(0.9)
Winding start mark
Weight: 0.4g
Dimensions in mm
ELECTRICAL CHARACTERISTICS
Inductance
(µH)
3.3
4.7
6.8
10
15
22
33
47
Inductance
tolerance
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
• Test equipment
Test frequency
L (kHz)
100
100
100
100
100
100
100
100
DC resistance
(Ω)±20%
0.028
0.038
0.059
0.083
0.11
0.18
0.24
0.34
Rated current
(A)max.
1.6
1.5
1.3
1.1
0.88
0.75
0.65
0.54
Part No.
SLF7028T-3R3M1R6-PF
SLF7028T-4R7M1R5-PF
SLF7028T-6R8M1R3-PF
SLF7028T-100M1R1-PF
SLF7028T-150MR88-PF
SLF7028T-220MR75-PF
SLF7028T-330MR65-PF
SLF7028T-470MR54-PF
L: 4194A IMPEDANCE/GAIN-PHASE ANALYZER HP, or equivalent (Measured at 100kHz/0.5V)
Rdc:MATSUSHITA,VP-2941A DIGITAL MILLIOHM METER, or equivalent
10000
Test circuit L=0.1H C=20000µF
A
DC
3000
Specimen
YHP model-4275A or equivalent
Universal
bridge
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE CHANGE vs. DC SUPERPOSITION
CHARACTERISTICS
Inductance (µH)
1000
300
100
47µH
33µH
22µH
15µH
10µH
6.8µH
4.7µH
3.3µH
30
10
3
1
0.01 0.03
0.1
0.3
1
DC current (A)
3
10
• All specifications are subject to change without notice.
002-05 / 20070516 / e531_slf7028.fm
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