Series
SMDR
Unshielded SMT Power Inductors
SMDR 0402/0802/0804/0810/1206 TYPE
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
Shape and Size: (Dimensions are in mm)
INDUCTANCE AND RATED CURRENT RANGES
ITEM
A (MAX) B (MAX) C (MAX)
D
E
F
H
I
J
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
SMDR0402
SMDR0802
SMDR0804
SMDR0810
SMDR1206
6.60
12.95
12.95
12.95
18.54
4.45
9.40
9.40
9.40
15.24
2.82
3.50
5.21
11.43
7.11
4.32
7.62
7.62
7.62
12.70
1.27
2.54
2.54
2.54
2.54
1.02
2.54
2.54
2.54
2.54
3.56
2.79
2.79
2.79
2.79
1.40
2.92
2.92
2.92
2.92
4.06
7.37
7.37
7.37
12.45
PART NUMBERING SYSTEM
SMDR
Test Equipments:
M
-
470
0802
• 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
Meritek Series
Size (in mm)
0402 0802 0804 0810 1206
Code
ORDERING INFORMATION
See corresponded dimensions chart
SM DR0804 - 470
(1) (2) (3)
M
(4)
Inductance (uH)
First two digits are significant figures
Third Digit denotes number of Zeros
(1)Type: Surface Mount
(2) Style: DR Core OD =8.5mm H=4.0mm
(3) Inductance: 470 for 47uH
Tolerance
K
M
Code
10%
20%
(4) InductanceTolerance: K : 10%; M : 20%
1