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002-05 / 20070516 / e531_slf7028.fm
• All specifications are subject to change without notice.
SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)
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.
APPLICATIONS
Portable telephones, personal computers, hard disk drives, and
other electronic equipment.
SPECIFICATIONS
RECOMMENDED REFLOW SOLDERING CONDITIONS
PRODUCT IDENTIFICATION
(1) Series name
(2) Dimensions
(3) Packaging style
(4) Inductance value
(5) Inductance tolerance
(6) Rated current
(7) Lead-free compatible product
PACKAGING STYLE AND QUANTITIES
Conformity to RoHS Directive
Operating temperature range –20 to +85°C
[Including self-temperature rise]
Storage temperature range –40 to +85°C[Unit of products]
30s
120s
Preheating
5s
Natural
cooling
250±5˚C
230˚C
180˚C
150˚C
Time(s)
SLF 7028 T- 3R3 M 1R6 - PF
(1) (2) (3) (4) (5) (6) (7)
7028 7.0×7.0×2.8mm (L×W×T)
T Taping(reel)
3R3 3.3µH
100 10µH
M±20%
1R6 1.6A
R88 0.88A
PF Lead-free compatible product
Packaging style Quantity
Taping 1000 pieces/reel
• 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.
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002-05 / 20070516 / e531_slf7028.fm
• All specifications are subject to change without notice.
SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PATTERN
ELECTRICAL CHARACTERISTICS
• Test equipment L: 4194A IMPEDANCE/GAIN-PHASE ANALYZER HP, or equivalent (Measured at 100kHz/0.5V)
Rdc:MATSUSHITA,VP-2941A DIGITAL MILLIOHM METER, or equivalent
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE CHANGE vs. DC SUPERPOSITION
CHARACTERISTICS
Inductance
(µH)
Inductance
tolerance
Test frequency
L (kHz)
DC resistance
(Ω)±20%
Rated current
(A)max. Part No.
3.3 ±20% 100 0.028 1.6 SLF7028T-3R3M1R6-PF
4.7 ±20% 100 0.038 1.5 SLF7028T-4R7M1R5-PF
6.8 ±20% 100 0.059 1.3 SLF7028T-6R8M1R3-PF
10 ±20% 100 0.083 1.1 SLF7028T-100M1R1-PF
15 ±20% 100 0.11 0.88 SLF7028T-150MR88-PF
22 ±20% 100 0.18 0.75 SLF7028T-220MR75-PF
33 ±20% 100 0.24 0.65 SLF7028T-330MR65-PF
47 ±20% 100 0.34 0.54 SLF7028T-470MR54-PF
7±0.2
Marking
(Inductance code)
Winding start mark
7±0.2
4.9typ.
(0.9)
Weight: 0.4g
Dimensions in mm
2±0.1
2.8±0.2
0.1typ.
470
4.9 1.51.5
2.2
DC current(A)
0.01
3
1
100
1000
300
30
10
10000
3000
0.1 0.30.03 3110
Inductance(µH)
A
L=0.1H C=20000µF
Specimen
Test circuit
YHP model-4275A or equivalent
DC
Universal
bridge
10µH
15µH
22µH
33µH
47µH
3.3µH
4.7µH
6.8µH
