Unshielded SMT Power Inductors
SMDR 0402/0802/0804/0810/1206 TYPE
SMDR
Series
MERITEK
FEATURES
• High power, high saturation, low resistence
• Ideal inductors for DC-DC conversion in notebook
computer, PDAs, Step-up or step-down converters, flash
memory programmers, etc.
• SMDR0402 used ceramic base with gold-planting
• The others used LCP plastic base
CHARACTERISTICS
• I sat: The current when the inductance becomes 10%
lower than its initial value. (Ta = 20 ºC)
• I rms: The current when temperature of coil increases up
to Max. T = 40 ºC (Ta = 20 ºC)
• Operating temperature: -40 to 85 ºC
APPLICATIONS
• Portable telephones
• Personable computers
• DC/DC converters, etc.
• Other various electronic appliances
INDUCTANCE AND RATED CURRENT RANGES
SMDR0402..........1.0 ~ 1000 uH.............2.9 ~ 0.07A
SMDR0802..........10 ~ 1000 uH..............2.0 ~ 0.05A
SMDR0804..........1.0 ~ 1000 uH.............6.8 ~ 0.030A
SMDR0810..........10 ~ 1000 uH..............3.5 ~ 0.10A
SMDR1206..........1.0 ~ 1000 uH.............8.6 ~ 0.56A
Test Equipments:
• L: Agilent 4284A LCR meter @ 100kHz 0.1V
• DC Resistance: Milli - ohm meter or equivalent
• SRF: Agilant 4291 B RF Impedance Analyzer
• Electrical specifications at 25 ºC
Shape and Size: (Dimensions are in mm)
ITEM
A (MAX) B (MAX) C (MAX)
SMDR0402
6.60
4.45
2.82
SMDR0802
12.95
9.40
3.50
SMDR0804
12.95
9.40
5.21
SMDR0810
12.95
9.40
11.43
SMDR1206
18.54
15.24
7.11
D
4.32
7.62
7.62
7.62
12.70
E
1.27
2.54
2.54
2.54
2.54
F
1.02
2.54
2.54
2.54
2.54
H
3.56
2.79
2.79
2.79
2.79
I
1.40
2.92
2.92
2.92
2.92
J
4.06
7.37
7.37
7.37
12.45
PART NUMBERING SYSTEM
SMDR
0802
-
470
M
Meritek Series
Size (in mm)
ORDERING INFORMATION
SM
(1)
DR0804
(2)
- 470
(3)
M
(4)
Code
0402
0802
0804
0810
1206
See corresponded dimensions chart
(1) Type:
Surface Mount
(2) Style:
DR
Core
OD
=8.5mm
H=4.0mm
(3) Inductance:
470
for
47uH
(4) Inductance Tolerance:
K
:
±
10%;
M
:
±
20%
First two digits are significant figures
Third Digit denotes number of Zeros
Inductance (uH)
Tolerance
Code
±
10%
±
20%
K
M
1
嵌入式系统
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