Features
Applications
nꢀ Semi-shieldedꢀconstruction
nꢀ Miniatureꢀsize
nꢀ DC/DCꢀconverters
nꢀ Notebookꢀcomputers
nꢀ Digitalꢀvideoꢀcameras
nꢀ HDDs
nꢀꢀLowꢀprofileꢀ-ꢀ1.8ꢀmmꢀmax.
nꢀꢀInductanceꢀrange:ꢀ0.82ꢀtoꢀ220ꢀµH
nꢀꢀHighꢀratedꢀcurrentꢀ-ꢀupꢀtoꢀ4.0ꢀA
nꢀ RoHSꢀcompliant*ꢀandꢀhalogenꢀfree**
4R7
nꢀ Cellꢀphones
nꢀ Televisions,ꢀLCDꢀdisplays
SRN4018ꢀSeriesꢀ-ꢀSemi-shieldedꢀPowerꢀInductors
ꢀꢀ
ꢀ
Electrical Specifications @ 25 °C
General Specifications
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature (Component)
................................. -40 °C to +125 °C
Resistance to Solder Heat
...............................+260 °C for 10 sec.
Temperature Rise.....40 °C at rated Irms
Rated Current
Inductance
@ 100 KHz/1 V
Test
Freq.
(MHz)
SRF
(MHz)
Typ.
DCR
(W)
Max.
Q
(Ref.)
Irms
(A)
Isat
(A)
Bourns Part No.
SRN4018-R82Y
SRN4018-1R0Y
SRN4018-1R2Y
SRN4018-1R5Y
SRN4018-2R2M
SRN4018-2R7M
SRN4018-3R3M
SRN4018-4R7M
SRN4018-6R8M
SRN4018-100M
SRN4018-150M
SRN4018-220M
SRN4018-330M
SRN4018-470M
SRN4018-680M
SRN4018-101M
SRN4018-151M
SRN4018-221M
SRN4018-331M
L (mH)
0.82
1.0
1.2
1.5
2.2
2.7
3.3
4.7
6.8
10
Tol. %
30
30
30
30
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
9
9
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
2.52
2.52
2.52
2.52
2.52
2.52
0.796
0.796
0.796
0.796
100
90
80
70
60
52
45
35
30
25
18
15
12
10
8
0.019
0.023
0.025
0.032
0.044
0.052
0.066
0.084
0.118
0.180
0.264
0.348
0.552
0.780
1.128
1.596
2.400
3.552
6.36
4.0
3.7
3.5
3.1
2.9
2.3
2.2
1.9
1.5
1.3
1.0
0.9
0.7
0.6
0.5
0.42
0.32
0.28
0.2
4.7
4.2
9
4.0
9
3.5
9
3.0
............ Inductance drops 30 % at Isat
Moisture Sensitivity Level.....................1
ESD Classification (HBM)................. N/A
9
2.4
9
2.3
9
2.0
Materials
9
1.6
11
11
11
11
11
11
23
23
30
30
1.4
Core..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ........................Sn/Ag/Cu
Coating.................Magnetic epoxy resin
Packaging..... 3000 pcs. per 13-inch reel
15
1.1
22
0.95
0.75
0.62
0.50
0.45
0.35
0.30
0.21
33
47
68
How to Order
100
150
220
330
6
5
SRN4018 - 100M
3
Model
6
Value Code (see table)
Recommended Layout
Electrical Schematic
Product Dimensions
4.55
(.1798
4.0 0.ꢀ
(.157 .00ꢁ8
3.6
(.14ꢀ8
4.0 0.ꢀ
(.157 .00ꢁ8
1.5
1.5
(.0598
(.0598
*ꢀ RoHSꢀDirectiveꢀ2002/95/ECꢀJan.ꢀ27,ꢀ2003ꢀincludingꢀannexꢀandꢀRoHSꢀRecastꢀ2011/65/EUꢀJuneꢀ8,ꢀ2011.ꢀ
**ꢀBournsꢀconsidersꢀaꢀproductꢀtoꢀbeꢀ“halogenꢀfree”ꢀifꢀ(a)ꢀtheꢀBromineꢀ(Brꢀ)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀꢀ
ꢀ
ꢀ
(b)ꢀtheꢀChlorineꢀ(ꢀClꢀ)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀandꢀ(c)ꢀtheꢀtotalꢀBromineꢀ(Br)ꢀꢀandꢀChlorineꢀ(ꢀClꢀ)ꢀcontentꢀisꢀꢀ
1500ꢀppmꢀorꢀless.
1.ꢁ
(.0718
MAX.
ꢀ
MM
(INCHES)
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.
DIMENSIONS:
ꢀ
Usersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀapplications.ꢀ
Theꢀproductsꢀdescribedꢀhereinꢀandꢀthisꢀdocumentꢀareꢀsubjectꢀtoꢀspecificꢀlegalꢀdisclaimersꢀasꢀsetꢀforthꢀonꢀtheꢀlastꢀpageꢀofꢀ
thisꢀdocument,ꢀandꢀatꢀwww.bourns.com/docs/legal/disclaimer.pdf.