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001-03 / 20080822 / e531_vlm10555_2.fm
• All specifications are subject to change without notice.
SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)
VLM Series VLM10555-2
FEATURES
• Low loss and large current capability design.
• High magnetic shield construction should actualize high resolu-
tion for EMC protection.
• Available for automatic mounting in tape and real package.
APPLICATIONS
Note book type and mobile computers, amusement equipment,
DVD players, VRMs, plasma displays, etc.
SHAPES AND DIMENSIONS
RECOMMENDED PC BOARD PATTERN
ELECTRICAL CHARACTERISTICS
∗Rated current: Value obtained when current flows and the temperature has risen to 40°C or when DC current flows and the nominal value of inductance
has fallen by 30%, whichever is smaller.
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE CHANGE vs. DC SUPERPOSITION
CHARACTERISTICS
TEMPERATURE RISE CHARACTERISTICS
Conformity to RoHS Directive
1R8M
10.6±0.2
10.5max.5.4±0.2
Dimensions in mm
3.92.7
11.5
1.8
3.7
8.7
Dimensions in mm
Part No. Inductance
(µH)
Inductance
tolerance
(%)
Test frequency
(kHz)
DC resistance
(mΩ)
Rated current(A)∗
Based on inductance change
max.(typ.)
Based on
temperature rise
typ.
[±15%] typ. [at 25°C] [at 100°C]
VLM10555T-1R8M8R8-2 1.8 ±20 100 5.6 5.6 18(20) 14(16) 8.8
VLM10555T-2R5M8R0-2 2.5 ±20 100 6.7 6.7 15(17) 12(14) 8
VLM10555T-3R3M7R2-2 3.3 ±20 100 8.3 8.3 12(14) 10(12) 7.2
VLM10555T-4R3M7R2-2 4.3 ±20 100 8.3 8.3 9(11) 7(9) 7.2
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 5 10 15 20 25
DC current(A)
1.8µH[at 25˚C]
2.5µH[at 25˚C]
3.3µH[at 25˚C]
4.3µH[at 25˚C]
1.8µH[at 100˚C]
2.5µH[at 100˚C]
3.3µH[at 100˚C]
4.3µH[at 100˚C]
Inductance(µH)
0
5
10
15
20
25
30
35
40
45
50
55
60
024681012
Self-temperature rise(˚C)
DC current(A)
1.8µH
2.5µH
3.3µH/4.3µH
• 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.
