DOCUMENT
REVISION
PAGE
: SIG4018L-XXX
: A4
: 1 OF 11
SPECIFICATION FOR APPROVAL
SIG4018L-XXX Sealed Choke Coil
1. Features
Low profile：3.8mm
x
3.8mm
x
1.8mm
Low coil resistance with large currents.
High magnetic shield construction should actualize high resolution for EMC protection.
100% lead (Pb) free meet RoHS standard
2. Application
Cellular phones, LCD displays, HDDs, DVCs, DSCs, PDAs etc..
3. Type Designation
SIG
4018
(1)
(2)
Where
L
(3)
-
XXX
(4)
(1) Series No :
(2) Size :
4018 = 3.8mm
x
3.8mm
x
1.8mm
(3) Model characteristic :
L: Low Resistance , H: High Current
(4) Inductance Value :
4R7 = 4.7µH
4. Outline Dimensions
W
L
Code
L
W
T
P
P
P
Dimensions (mm)
3.8
±
0.2*
3.8
±
0.2*
1.8 max. *
1.0
±
0.2
* Dimensions are of the case not including the
termination. For maximum overall dimensions
including the termination, add 0.1mm.
T
Note：This graph is only regard to dimensions spec. For outer appearance, please refer to actual product.
DOCUMENT
REVISION
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: SIG4018L-XXX
: A4
: 2 OF 11
SPECIFICATION FOR APPROVAL
5. Recommend Land Pattern Dimensions
The customer shall determine the land dimensions shown above after confirming and safety.
B
A
A
C
3.8
1.8
3.8
Unit : mm
B
C
6. Specifications
L0
Inductance
(
µH
)
@ (0A)
0.56
1.0
1.2
1.5
1.8
2.2
3.3
4.7
6.8
8.2
10.0
15.0
22.0
33.0
47.0
68.0
100.0
220.0
330.0
R
dc
( mΩ)
Typical
17
20
25
33
34
35
45
70
90
105
135
185
250
405
495
885
1,545
3,150
4,200
Maximum
22
25
30
40
41
45
56
90
115
132
170
222
315
486
594
1,062
1,854
3,780
5,040
Heat Rating Current DC
Amps. Idc ( A )
Typical
5.4
3.8
3.6
3.2
3.1
3.0
2.7
2.2
1.9
1.5
1.4
1.25
1.2
0.9
0.8
0.58
0.42
0.30
0.27
Maximum
4.86
3.42
3.24
2.88
2.79
2.70
2.43
1.98
1.71
1.35
1.26
1.12
1.08
0.81
0.72
0.52
0.37
0.27
0.24
Saturation Current
DC Amps. Isat ( A )
Typical
5.5
3.8
3.6
3.5
3.1
3.0
2.4
2.0
1.7
1.6
1.55
1.0
0.83
0.68
0.56
0.48
0.45
0.33
0.25
Maximum
4.95
3.42
3.24
3.15
2.79
2.70
2.16
1.80
1.53
1.44
1.40
0.90
0.74
0.61
0.50
0.43
0.40
0.30
0.22
Part Number
SIG4018L-R56
SIG4018L-1R0
SIG4018L-1R2
SIG4018L-1R5
SIG4018L-1R8
SIG4018L-2R2
SIG4018L-3R3
SIG4018L-4R7
SIG4018L-6R8
SIG4018L-8R2
SIG4018L-100
SIG4018L-150
SIG4018L-220
SIG4018L-330
SIG4018L-470
SIG4018L-680
SIG4018L-101
SIG4018L-221
SIG4018L-331
*
：
If you require another part number please contact with us.
**
：
Inductance Tolerance
±
20%
Note 1.
：
All test data is referenced to 25
℃
ambient.
Note 2.
：
Idc : DC current (A) that will cause an approximate
△
T of 40
℃
Note 3.
：
Isat : DC current (A) that will cause Lo to drop approximately 30%
Note 4.
：
Operating Temperature Range -55
℃
to + 125
℃
Note 5.
：
The part temperature (ambient + temp rise ) should not exceed 125
℃
under worse case operating
conditions. Circuit design , component placement, PWB trace size and thickness, airflow and other
cooling provision all affect the part temperature. Part temperature should be verified in the end
application.
Note 6.
：
The rated current as listed is either the saturation current or the heating current depending on
which value is lower.
DOCUMENT
REVISION
PAGE
: SIG4018L-XXX
: A4
: 3 OF 11
SPECIFICATION FOR APPROVAL
6-1 Current Characteristic Current Characteristic
0.72
INDUCTANCE(µH)
0.60
0.48
0.36
0.24
0.12
0.00
0.0
1.0
2.0
3.0
4.0
5.0
DC BIAS(Amps)
6.0
7.0
8.0
INDUCTANCE(µH)
TEMP.RISE(
℃
)
SIG4018L-R56
100
INDUCTANCE(µH)
80
TEMP RISE(℃ )
60
40
20
0
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
0.8
1.6
INDUCTANCE(µH)
TEMP.RISE(
℃
)
SIG4018L-1R0
100
80
60
40
20
0
TEMP RISE(℃ )
2.4
3.2
4.0
DC BIAS(Amps)
4.8
5.6
1.5
INDUCTANCE(µH)
1.2
0.9
INDUCTANCE(µH)
SIG4018L-1R2
100
1.8
INDUCTANCE(µH)
1.5
1.2
TEMP RISE(℃ )
SIG4018L-1R5
70
60
50
TEMP RISE(
℃
)
TEMP RISE(
℃
)
TEMP RISE(
℃
)
80
60
TEMP.RISE(
℃
)
INDUCTANCE(µH)
40
30
20
10
0
0.9
TEMP.RISE(℃)
0.6
0.3
0.0
40
20
0
0.6
0.3
0.0
0.0
0.4
0.8
1.2
1.6
2.0 2.4 2.8 3.2
DC BIAS(Amps)
3.6
4.0
4.4
4.8
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6
DC BIAS(Amps)
2.1
INDUCTANCE(µH)
1.8
1.5
1.2
0.9
0.6
0.3
0.0
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-1R8
70
INDUCTANCE(µH)
60
50
40
30
20
10
0
TEMP RISE(
℃
)
3.0
2.5
2.0
SIG4018L-2R2
100
80
60
1.5
1.0
0.5
0.0
0.0
0.4
INDUCTANCE(µH)
40
TEMP.RISE(℃)
20
0
0.8
1.2
1.6 2.0 2.4 2.8
DC BIAS(Amps)
3.2
3.6
4.0
4.4
0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2
DC BIAS(Amps)
4.2
INDUCTANCE(µH)
3.5
2.8
2.1
1.4
0.7
0.0
0.0
0.3
0.6
0.9
1.2
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-3R3
70
60
50
40
30
20
10
0
INDUCTANCE(µH)
TEMP RISE(
℃
)
5.4
4.5
3.6
2.7
1.8
0.9
0.0
0.0
0.3
0.6
0.9
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-4R7
100
80
60
40
20
0
1.5 1.8 2.1 2.4
DC BIAS(Amps)
2.7
3.0
3.3
3.6
1.2 1.5 1.8 2.1
DC BIAS(Amps)
2.4
2.7
3.0
3.3
DOCUMENT
REVISION
PAGE
: SIG4018L-XXX
: A4
: 4 OF 11
SPECIFICATION FOR APPROVAL
8.4
INDUCTANCE(µH)
7.0
5.6
4.2
2.8
1.4
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
DC BIAS(Amps)
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-6R8
100
INDUCTANCE(µH)
80
TEMP RISE(
℃
)
60
40
20
0
9.6
8.0
6.4
4.8
3.2
1.6
0.0
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-8R2
90
75
60
45
30
15
0
TEMP RISE(
℃
)
TEMP RISE(
℃
)
TEMP RISE(
℃
)
TEMP RISE(
℃
)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
DC BIAS(Amps)
12.0
INDUCTANCE(µH)
10.0
8.0
6.0
4.0
2.0
0.0
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-100
100
INDUCTANCE(µH)
80
TEMP RISE(
℃
)
60
40
20
0
18.0
15.0
12.0
9.0
6.0
3.0
0.0
0.0
0.2
0.4
0.6
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-150
75
60
45
30
15
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
DC BIAS(Amps)
0.8
1.0
1.2
DC BIAS(Amps)
1.4
1.6
1.8
2.0
27.0
INDUCTANCE(µH)
22.5
18.0
SIG4018L-220
75
INDUCTANCE(µH)
60
TEMP RISE(
℃
)
45
42.0
35.0
28.0
21.0
14.0
7.0
0.0
0.0
0.1
0.2
0.3
0.4
INDUCTANCE(µH)
SIG4018L-330
75
60
45
30
13.5
9.0
4.5
0.0
0.0
0.2
INDUCTANCE(µH)
TEMP.RISE(℃)
30
15
0
TEMP.RISE(℃)
15
0
0.5 0.6 0.7 0.8
DC BIAS(Amps)
0.9
1.0
1.1
1.2
0.4
0.6
0.8
1.0
DC BIAS(Amps)
1.2
1.4
1.6
54.0
INDUCTANCE(µH)
45.0
36.0
27.0
18.0
9.0
0.0
0.0
0.1
0.2
0.3
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-470
100
70
INDUCTANCE(µH)
80
TEMP RISE(
℃
)
60
40
20
0
56
INDUCTANCE(µH)
SIG4018L-680
70
60
50
40
30
20
42
28
14
0
0.0
0.1
TEMP.RISE(℃)
10
0
0.2
0.3
0.4
0.5
DC BIAS(Amps)
0.6
0.7
0.8
0.4 0.5 0.6 0.7
DC BIAS(Amps)
0.8
0.9
1.0
1.1
DOCUMENT
REVISION
PAGE
: SIG4018L-XXX
: A4
: 5 OF 11
SPECIFICATION FOR APPROVAL
120.0
INDUCTANCE(µH)
100.0
80.0
60.0
40.0
20.0
0.0
0.00
0.10
0.20
0.30
0.40
DC BIAS(Amps)
0.50
0.60
0.70
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-101
100
INDUCTANCE(µH)
80
TEMP RISE(
℃
)
60
40
20
0
270.0
225.0
180.0
135.0
90.0
45.0
0.0
0.00
0.05
0.10
0.15
INDUCTANCE(µH)
TEMP.RISE(℃)
SIG4018L-221
100
80
60
40
20
0
TEMP RISE(
℃
)
0.20 0.25 0.30
DC BIAS(Amps)
0.35
0.40
0.45
420.0
INDUCTANCE(µH)
350.0
280.0
210.0
140.0
70.0
0.0
0.00
0.05
0.10
INDUCTANCE(µH)
SIG4018L-331
100
80
60
40
TEMP RISE(
℃
)
TEMP.RISE(℃)
20
0
0.15
0.20
0.25
DC BIAS(Amps)
0.30
0.35
0.40
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