YAGEO CORPORATION
SMD INDUCTOR / BEADS
SDT0402 Series
AppLICATIonS
Board mounted DC-DC converters
Miniature power supplies, and voltage multiplying circuits.
These inductors are designed for a wide variety of applications including board mounted DC-DC con-
verters, miniature power supplies, and voltage multiplying circuits. They function equally well in filter
and smoothing circuit applications.
The Yageo SDT Series represents the ultimate in cost effective miniature power inductors. They are
constructed of materials specially developed for surface mount applications to ensure the best pos-
sible reliability and ease of using and handling.
Because of their “ swinging “ inductance vs. current characteristics, the SSL0402 Series can be used
as ultra high L inductors at zero or low current.
SMD Power Inductors
fEATURES
Ultra high L and low current
Functions equally well in filter and smoothing cir-
cuit applications.
• Available in 2 sizes.
pRodUCT IdEnTIfICATIon
SpECIfICATIonS
pART no.
SDT0402T-1R0M-S
SDT0402T-1R5M-S
SDT0402T-2R2M-S
SDT0402T-3R3M-S
SDT0402T-4R7M-S
SDT0402T-6R8M-S
SDT0402T-100M-S
SDT0402T-150M-S
SDT0402T-220M-S
SDT0402T-330M-S
SDT0402T-470M-S
SDT0402T-680M-S
SDT0402T-101M-S
SDT0402T-151M-S
SDT0402T-221M-S
SDT0402T-331M-S
SDT0402T-471M-S
SDT0402T-681M-S
SDT0402T-102M-S
IndUCTAnCE dC
@100kHz, 0 Adc RESISTAnCE
(µH ± 20%)
(Ω) Max.
1.0
1.5
2.2
3.3
4.7
6.8
10
15
22
33
47
68
100
150
220
330
470
680
1000
0.045
0.050
0.060
0.070
0.080
0.085
0.095
0.135
0.160
0.275
0.340
0.575
1.100
1.400
2.250
2.900
3.600
4.550
8.100
opERATInG pARAmETERS
IndUCTAnCE
RATInG *
(µH)
0.60
0.80
0.90
1.5
2.0
3.0
5.0
6.0
10
12
20
30
40
60
90
100
150
200
400
CURREnT
RAGInG **
(A)
2.0
1.9
1.5
1.2
1.2
1.0
0.7
0.6
0.5
0.45
0.34
0.29
0.24
0.20
0.17
0.16
0.14
0.12
0.08
EnERGY
SToRAGE
(µ Joules) Max.
1.8
1.8
1.8
1.4
1.6
1.9
1.2
1.1
1.2
1.5
1.3
1.4
1.5
1.4
1.6
1.4
1.5
1.4
1.4
SWITCHInG
fREQUECnY
Max.
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
500 KHz
500 KHz
500 KHz
500 KHz
500 KHz
500 KHz
SRf
(mHz)
157
108
92
69
59
51
33
26
20
17
12
11
9.4
6.7
6.1
4.7
SDT
-
-
International No.
Tolerance
Inductance
Packaging Style
Dimensions
Product Symbol
• Packaging: T: Tape and Reel
• Tolerance: M: ±20%
• Note: YAGEO will start to release SDT Series
inductors with lead-free terminals which
meet SONY SS-00259's criteria for lead-free
product in Q2 of 2004, and YAGEO Internal
No will be changed to “N” as identification.
Ex. SDT0402T-1R0M-N
SHApES And dImEnSIonS
6.60
+0
1st.
4.45
+0
2nd.
3rd.
3.1
2.3
2.92
+0
4.32
1.02
* Measured at the rated current. Refer to curves below for more detail.
** Average maximum allowable current. SDT Series inductors are designed for current spikes as
high as 2X the current rating.
Operating Temperature Range -40°C to +85°C
1.27
Dimensions : mm
3.05
3.85
244
ELECTRICAL CHARACTERISTICS : LEAd-fREE & RoHS CompLIAnCE
pART no.
SDT0402T-1R0
SDT0402T-1R5
SDT0402T-2R2
SDT0402T-3R3
SDT0402T-4R7
SDT0402T-6R8
SDT0402T-100
SDT0402T-150
SDT0402T-220
SDT0402T-330
SDT0402T-470
SDT0402T-680
SDT0402T-101
SDT0402T-151
SDT0402T-221
SDT0402T-331
SDT0402T-471
SDT0402T-681
SDT0402T-102
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
-N
IndUCTAnCE
(UH)
1
1.5
2.2
3.3
4.7
6.8
10
15
22
33
47
68
100
150
220
330
470
680
1000
RdC
(Ω)mAx
0.045
0.05
0.06
0.07
0.08
0.085
0.095
0.135
0.16
0.275
0.34
0.575
1.1
1.4
2.25
2.9
3.6
4.55
8.1
SRf
(MHz)typ
157
108
92
69
59
51
33
26
20
17
12
11
9.4
6.7
6.1
4.7
3.85
3.1
2.3
CURREnT
RATInG
(A)
2
1.9
1.5
1.2
1.2
1
0.7
0.6
0.5
0.45
0.34
0.29
0.24
0.2
0.17
0.16
0.14
0.12
0.08
Inductan
CE
(uH)
0.6
0.8
0.9
1.5
2
3
5
6
10
12
20
30
40
60
90
100
150
200
400
mAx
EnERGY
(uJoules)
1.8
1.8
1.8
1.4
1.6
1.9
1.2
1.1
1.2
1.5
1.3
1.4
1.5
1.4
1.6
1.4
1.5
1.4
1.4
mAx
SWITCHIn
Frequency
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
1MHz
500kHz
500kHz
500kHz
500kHz
500kHz
500kHz
NOTE :
-tolerance K=±10% / =±15% / M=±20% / N=+40% -20%
1.Operating temperature range -40°C~85°C
2.Inductance Rating: Measured at the ratted current.SDT Series inductors are design for current
3. Current Raging:Average maximum allowable current.SDT Series inductors are design for current
spikes as high as 2X the current rating; TEST FREQUENCY :100 KHz/0.1V
"-N"FOR COMPLETELY LEAD FREE TYPE(INCLUDING FERRITE BODY & SOLDER)
245
TYpICAL IndUCTAnCE EnERGY SToRAGE VS. CURREnT
SDT0402Y-1R0M-S
1
0.9
0.8
INDUCTANCE (uH)
SDT0402T-101M-S
2
1.8
1.6
ENEGY STORAGE (uj)
INDUCTANCE (uH)
120
100
80
60
40
20
0
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.04
0.08
0.12
0.16
0.2
0.24
0.28
0.32
0.36
0.4
0
ENEGY STORAGE (uj)
ENEGY STORAGE (uj)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
CURRENT (A)
CURRENT (A)
SDT0402T-100M-S
12
10
INDUCTANCE (uH)
SDT0402Y-102M-S
1.2
1.0
ENEGY STORAGE (uj)
1000
900
800
INDUCTANCE (uH)
2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0
8
6
4
2
0
0.8
0.6
0.4
0.2
0
700
600
500
400
300
200
100
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
CURRENT (A)
0
CURRENT (A)
RECommEnd SoLdERInG CondITIonS
for:CL/ CLH/ SQV/ SMD power inductors/ SMD Chip Beads/ SMD Filters, Transformers, Current Sensors
temperature °C
pre-heating
soldering
natural cooling
260 °C
230 °C
160 °C
150 °C
time:second
60 second
120 second
5~10 second
80 second
for: lead solder
for: lead-free solder
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