SD38 Series
Low Profile, Shielded Inductors
Description
RoHS
2002/95/EC
• 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
• Ferrite core material
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
• Solder reflow temperature: +260°C max for 10 seconds
max.
Part Number
SD3812-R47-R
SD3812-1R0-R
SD3812-1R2-R
SD3812-1R5-R
SD3812-2R2-R
SD3812-3R3-R
SD3812-4R7-R
SD3812-6R8-R
SD3812-8R2-R
SD3812-100-R
SD3812-150-R
SD3812-220-R
SD3812-330-R
SD3812-470-R
SD3812-680-R
SD3812-820-R
SD3812-101-R
SD3812-151-R
SD3812-221-R
SD3814-R47-R
SD3814-R82-R
SD3814-1R2-R
SD3814-1R5-R
SD3814-2R2-R
SD3814-3R3-R
SD3814-4R7-R
SD3814-6R8-R
SD3814-8R2-R
SD3814-100-R
SD3814-150-R
SD3814-220-R
SD3814-330-R
SD3814-470-R
SD3814-680-R
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
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
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
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
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
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
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
LOW PROFILE SHIELDED DRUM (SD38)
(1) Test Parameters: 100KHz, 0.100Vrms, 0.0Adc.
(2) RMS current for an approximate
ΔT
of 40°C without core loss. It is recommend-
ed 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.
PM-95
SD38 Series
Low Profile, Shielded Inductors
Part Number
SD3814-820-R
SD3814-101-R
SD3814-151-R
SD3814-221-R
SD3814-331-R
SD3814-471-R
SD3814-681-R
Rated
Inductance
(μH)
82.0
100.0
150.0
220.0
330.0
470.0
680.0
OCL (1)
+/-15%
(μH)
81.101
98.794
149.026
217.342
326.812
470.031
680.320
Part
Marking
Designator
P
Q
R
S
T
U
V
Irms (2)
Amperes
0.270
0.228
0.191
0.170
0.136
0.111
0.100
Isat (3)
Amperes
0.296
0.268
0.219
0.181
0.148
0.123
0.102
DCR (4)
(Ω)
Typ.
2.174
3.048
4.359
5.480
8.59
12.85
15.78
Volt (5)
u-sec
Typ.
32
36
44
53
65
78
94
(1) Test Parameters: 100KHz, 0.100Vrms, 0.0Adc.
(2) RMS current for an approximate
ΔT
of 40°C without core loss. It is recommend-
ed 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.
Mechanical Diagrams
SD3812 Series
TOP VIEW
Pin #1 indicator
Marking
(see note A)
BOTTOM VIEW
SIDE VIEW
1.2
max
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
LOW PROFILE SHIELDED DRUM (SD38)
4.0
max
4.0
max
0.415 min
RECOMMENDED PCB LAYOUT
1.0
2 plcs
SCHEMATIC
2.5
2 plcs
4.0 typ
5.0
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.
PM-96
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
Inductance Characteristics
OCL vs Isat
SD3812
100
90
80
OCL vs Isat
SD3814
100
90
80
70
60
50
40
30
20
10
0
0
OCL (%)
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
110
120
130
OCL (%)
70
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)
LOW PROFILE SHIELDED DRUM (SD38)
% of Applied Volt-μSecond
PM-97
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