(1/2)
001-01 / 20070911 / e531_vlf4012s.fm
• All specifications are subject to change without notice.
SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)
VLF Series VLF4012S
FEATURES
• Miniature size
Mount area: 3.6× 3.8mm
Height: 1.2mm max.
• Generic use for portable DC to DC converter line.
• High magnetic shield construction should actualize high
resolution for EMC protection.
• Available for automatic mounting in tape and real package.
• The products do not contain lead and support lead-free
soldering.
APPLICATIONS
DVCs, DSCs, PDAs, LCD displays, cellular phones, HDDs, 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.
• Operating temperature range: –40 to +105°C (Including self-temperature rise)
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS
VLF4012ST-1R0N1R9 VLF4012ST-2R2M1R3
Conformity to RoHS Directive
4R7
3.8±0.2
3.6±0.2
Dimensions in mm
1.2max.
4.7
2.9
1.3
Dimensions in mm
Part No.
Inductance
(µH)
Inductance
tolerance(%)
Test frequency
(MHz)
DC resistance(Ω) Rated current(A)
∗
max. typ.
Based on inductance
change max.
Based on temperature
rise typ.
VLF4012ST-1R0N1R9 1 ±30 1 0.054 0.045 2.7 1.9
VLF4012ST-2R2M1R3 2.2 ±20 1 0.12 0.097 1.7 1.3
VLF4012ST-3R3M1R1 3.3 ±20 1 0.16 0.13 1.5 1.1
VLF4012ST-4R7M1R0 4.7 ±20 1 0.19 0.16 1.4 1
VLF4012ST-6R8MR80 6.8 ±20 1 0.32 0.27 1 0.8
VLF4012ST-100MR65 10 ±20 1 0.49 0.41 0.9 0.65
0.0
0.4
0.2
0.8
0.6
1.0
1.2
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Inductance
(
µH
)
DC current
(
A
)
0.0
1.0
0.5
2.0
1.5
2.5
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.22.0
Inductance
(
µH
)
DC current
(
A
)
• 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.
