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Delta Part No﹒︰SDEK20121T type
Part Name︰Sealed Choke
Sealed Choke Coil SDEK20121T type

Features
Low profile：2.0mm x 1.2mm x 1.0mm
Low coil resistance with large currents.
High magnetic shield construction should actualize high resolution for EMC protection.
100% lead (Pb) free meet RoHS standard

Application
Cellular phones, LCD displays, HDDs, DVCs, DSCs, PDAs etc..
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Outline Dimensions
W
L
Code
L
Dimensions (mm)
1.2  0.1
W
2.0  0.1
T
1.0 Max.
T
Note ：This graph is in regard to outline dimensions spec. For outer appearance, please refer to actual product.

Recommend Land Pattern Dimensions
The customer shall determine the land dimensions shown below after confirming and safety.
B
A
C
A
1.2
B
0.6
C
2.0
Unit : mm
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
Specifications
L0
Inductance
( H )
@ (0A)
Typical
SDEK20121T-R47MS
0.47
SDEK20121T-1R0MS
Heat Rating Current
DC Amps. Idc ( A )
Saturation Current
DC Amps. Isat ( A )
Maximum
Typical
Maximum
Typical
Maximum
58
65
2.2
2.0
3.1
2.8
1.0
140
170
1.50
1.35
2.25
2.05
SDEK20121T-2R2MS
2.2
345
415
0.80
0.72
1.40
1.30
SDEK20121T-4R7MS
4.7
545
654
0.70
0.63
0.80
0.72
Part Number
Rdc ( m)
* ：If you require another part number please contact with us.
**：Inductance Tolerance  20%
Note 1.：
Note 2.：
Note 3.：
Note 4.：
Note 5.：
Note 6.：
All test data is referenced to 25℃ ambient.
Test Condition:1MHz, 1.0Vrms
Idc : DC current (A) that will cause an approximate △T of 40℃
Isat : DC current (A) that will cause L0 to drop approximately 30%
Operating Temperature Range -55℃ to + 125℃
The part temperature (ambient + temp rise) should not exceed 125℃ under the worst case operating.
Circuit design, component placement, PCB trace size and thickness, airflow and other cooling
provision all affect the part temperature. Part temperature should be verified in the end application.
Note 7.： The rated current as listed is either the saturation current or the heating current depending on which
value is lower.
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Current Characteristic
INDUCTANCE(μH)
0.27
TEMP RISE (℃)
80
1.0
60
40
0.18
20
0.09
0.00
0
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
SDEK20121T-1R0MS
80
0.8
TEMP RISE (℃)
20
0.2
0.0
0
0.0
0.3
0.6
0.9
1.80
60
INDUCTANCE(μH)
1.35
TEMP RISE (℃)
40
0.90
20
0.45
0.00
0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
DC BIAS(Amps)
1.4
1.6
1.8
INDUCTANCE(μH)
80
TEMPRISE(℃)
INDUCTANCE(uH)
6.0
100
2.25
40
0.4
3.6
SDEK20121T-2R2MS
60
INDUCTANCE(μH)
0.6
DC BIAS(Amps)
2.70
100
TEMPRISE(℃)
0.36
1.2
1.2
1.5
1.8
DC BIAS(Amps)
2.1
2.4
90
SDEK20121T-4R7MS
5.0
75
4.0
60
3.0
INDUCTANCE(μH)
45
2.0
TEMP. RISE(℃)
30
1.0
15
0.0
0
0.0
0.1
0.2
0.3
0.4 0.5 0.6
DC BIAS(Amps)
0.7
0.8
0.9
1.0
TEMP RISE (℃)
INDUCTANCE(uH)
0.45
100
INDUCTANCE(uH)
SDEK20121T-R47MS
0.54
TEMP RISE(℃)
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