SD38 Series
Low Profile, Shielded Inductors
Description
• 3.8mm x 3.8mm shielded drum cores available in two
heights: 1.2mm and 1.4mm
• Current range from 4.44 to 0.100 Amps
• Inductance range from 0.47 uH to 680 uH
• Ferrite shielded, low EMI
• RoHS compliant (-R option)
Applications
• Digital cameras, cellular phones, CD players, and PDAs
• PCMCIA cards
• GPS systems
Environmental Data
• Storage temperature range: -40°C to +125°C
• Operating ambient temperature range: -40°C to +85°C
(range is application specific). Temperature rise is
approximately 40°C at rated rms current
• Infrared reflow temperature: +240°C for 30 seconds
maximum
Part Number
SD3812-R47
SD3812-1R0
SD3812-1R2
SD3812-1R5
SD3812-2R2
SD3812-3R3
SD3812-4R7
SD3812-6R8
SD3812-8R2
SD3812-100
SD3812-150
SD3812-220
SD3812-330
SD3812-470
SD3812-680
SD3812-820
SD3812-101
SD3812-151
SD3812-221
SD3814-R47
SD3814-R82
SD3814-1R2
SD3814-1R5
SD3814-2R2
SD3814-3R3
SD3814-4R7
SD3814-6R8
SD3814-8R2
SD3814-100
SD3814-150
SD3814-220
SD3814-330
SD3814-470
SD3814-680
SD3814-820
SD3814-101
SD3814-151
Rated
Inductance
(µH)
0.47
1.0
1.2
1.5
2.2
3.3
4.7
6.8
8.2
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100.0
150.0
220.0
0.47
0.82
1.2
1.5
2.2
3.3
4.7
6.8
8.2
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100.0
150.0
OCL (1)
+/-15%
(µH)
0.405
0.845
1.125
1.445
2.205
3.125
4.805
6.845
8.405
10.125
15.125
21.125
32.805
47.045
68.445
80.645
99.405
149.645
218.405
0.360
0.752
1.001
1.286
1.962
2.781
4.276
6.768
8.228
9.830
14.458
21.186
32.151
47.210
67.324
81.101
98.794
149.026
Part
Marking
Designator
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
Packaging
• Supplied in tape and reel packaging,
4,150 parts per 13" reel
Irms (2)
Amperes
2.53
2.00
1.71
1.58
1.32
1.10
0.87
0.80
0.690
0.662
0.539
0.499
0.399
0.327
0.269
0.259
0.217
0.178
0.160
2.81
2.18
1.85
1.76
1.43
1.31
1.06
0.87
0.753
0.713
0.574
0.519
0.418
0.346
0.285
0.270
0.228
0.191
Isat (3)
Amperes
3.89
2.69
2.33
2.06
1.67
1.40
1.13
0.95
0.854
0.778
0.636
0.538
0.432
0.361
0.299
0.276
0.248
0.202
0.167
4.44
3.08
2.67
2.35
1.90
1.60
1.29
1.03
0.930
0.851
0.702
0.580
0.471
0.388
0.325
0.296
0.268
0.219
DCR (4)
(Ω)
Typ.
0.030
0.048
0.066
0.078
0.111
0.159
0.256
0.299
0.406
0.441
0.665
0.776
1.212
1.809
2.666
2.885
4.099
6.130
7.585
0.020
0.033
0.046
0.051
0.077
0.093
0.141
0.207
0.279
0.311
0.481
0.589
0.908
1.322
1.951
2.174
3.048
4.359
Volt (5)
u-sec
Typ.
2.52
3.64
4.20
4.76
5.88
7.0
8.7
10.4
11.5
12.6
15.4
18.2
22.7
27.2
32.8
36
39
48
59
2.16
3.12
3.60
4.08
5.04
6.0
7.4
9.4
10.3
11.3
13.7
16.6
20.4
24.7
29.5
32
36
44
(1) Test Parameters: 100KHz, 0.100Vrms, 0.0Adc.
(2) RMS current for an approximate
∆T
of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
De-rating is necessary for AC currents.
(3) Peak current for approximately 30% rolloff at 20°C.
(4) DCR limits @ 20°C.
(5) Applied Volt-Time product (V-uS) across the inductor at 100kHz necessary to
generate a core loss equal to 10% of the total losses for 40°C temperature rise.
De-rating of the Irms is required to prevent excessive temperature rise.
SD38 Series
Low Profile, Shielded Inductors
Part Number
SD3814-221
SD3814-331
SD3814-471
SD3814-681
Rated
Inductance
(µH)
220.0
330.0
470.0
680.0
OCL (1)
+/-15%
(µH)
217.342
326.812
470.031
680.320
Part
Marking
Designator
S
T
U
V
Irms (2)
Amperes
0.170
0.136
0.111
0.100
Isat (3)
Amperes
0.181
0.148
0.123
0.102
DCR (4)
(Ω)
Typ.
5.480
8.59
12.85
15.78
Volt (5)
u-sec
Typ.
53
65
78
94
(1) Test Parameters: 100KHz, 0.100Vrms, 0.0Adc.
(2) RMS current for an approximate
∆T
of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
De-rating is necessary for AC currents.
(3) Peak current for approximately 30% rolloff at 20°C.
(4) DCR limits @ 20°C.
(5) Applied Volt-Time product (V-uS) across the inductor at 100kHz necessary to
generate a core loss equal to 10% of the total losses for 40°C temperature rise.
De-rating of the Irms is required to prevent excessive temperature rise.
Option Code
-R
OPTION CODE
Description
RoHS compliant version
BOTTOM VIEW
SIDE VIEW
Marking
(see note A)
1.2
max
Mechanical Diagrams
SD3812 Series
TOP VIEW
Pin #1 indicator
4.8
MA X
3.65
typ
0.09 max
no plating
1.25
±0.12
2.03
±.
02
4.0
max
4.0
max
0.415 min
RECOMMENDED PCB LAYOUT
1.0
2 plcs
SCHEMATIC
2.5
2plcs
4.0 typ
5.0
Note A: 3 digit marking. First digit indicates inductance value per chart above.
Second digit indicates bi-weekly date code.
Third digit of year produced. Box indicates SD3814 part.
SD3814 Series
TOP VIEW
Pin #1 indicator
Marking
(see note A)
SIDE VIEW
1.4
max
BOTTOM VIEW
4.8
MA X
3.65
typ
0.09 max
no plating
1.25
±0.12
2.03
±.02
4.0
max
4.0
max
0.415 min
RECOMMENDED PCB LAYOUT
1.0
2 plcs
SCHEMATIC
2.5
2 plcs
4.0 typ
5.1
max
Note A: 3 digit marking. First digit indicates inductance value per chart above.
Second digit indicates bi-weekly date code.
Third digit of year produced. Box indicates SD3814 part.
SD38 Series
Low Profile, Shielded Inductors
Packaging Information
SD3812/SD3814 Series
4.00
2.00
±
0.05
1.5 Dia.
+0.1/-0.0
1.5 Dia
min.
1.75
Ao=5.1mm
Bo=4.6mm
Ko=1.6mm
Ko
Bo
5.50
4.5
Ao
8.0
4.5
12.0
+/-0.3
Parts packaged on 13" Diameter reel,
4,150 parts per reel.
SECTION A-A
Direction of feed
Rolloff
100
90
80
70
OCL vs Isat
SD3812
100
90
80
70
60
50
40
30
20
10
0
0
0
10
20
30
40
50
60
70
80
90
100
110
120
130
OCL vs Isat
SD3814
OCL (%)
60
50
40
30
20
10
0
OCL (%)
10 20 30 40 50 60 70 80 90 10 11 12 13 14 15 16
0 0 0 0 0 0 0
% of Isat
% of Isat
Core Loss
Irms DERATING WITH CORE LOSS
% of Losses from Irms (maximum)
% of Applied Volt-µSecond
PM-4318 9/05
© Cooper Electronic
Technologies 2005
Visit us on the Web at www.cooperET.com
3601 Quantum Boulevard Boynton Beach, Florida 33426-8638
Tel: +1-561-752-5000 Toll Free: +1-888-414-2645 Fax: +1-561-742-1178
This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Electronic
Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper
Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been
selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Electronic Technologies does not authorize the use of any of its products for use in life support devices or systems without the
express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when
properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
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