Features
Applications
nꢀ DC/DCꢀconverters
nꢀ Powerꢀsupplies
nꢀ Multipleꢀconfigurations:ꢀparallel,ꢀseries,ꢀꢀ
ꢀ
dual-inductorꢀandꢀtransformer
nꢀ Magneticallyꢀshielded,ꢀlowꢀradiation
nꢀꢀInductanceꢀrange:ꢀ8.2ꢀtoꢀ600ꢀμH
nꢀꢀHeatingꢀcurrentꢀupꢀtoꢀ2.19ꢀA
nꢀ AEC-Q200ꢀcompliant
nꢀ SEPICꢀ-ꢀDC/DCꢀconverters
0
7
4
nꢀ RoHSꢀcompliant*ꢀandꢀhalogenꢀfree**
SRF0703A Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
General Specifications
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Temperature Rise
.......................40 °C typ. at rated Irms
Inductance Drop...........30 % typ. at Isat
Hi-pot (N1-N2) ................500 Vac/60 Hz,
3 mA, 1 sec
Moisture Sensitivity Level.....................1
ESD Classification (HBM)................. N/A
Parallel Rating
Series Rating
DCR
Inductance
@ 100 kHz /
0.25 V
Inductance
@ 100 kHz /
0.25 V
DCR
(W)
Max.
Irms
(A)
Isat
(W)
Irms
(A)
Isat
(A)
Bourns Part No.
SRF0703A-8R2M
SRF0703A-100M
SRF0703A-150M
SRF0703A-220M
SRF0703A-330M
SRF0703A-470M
SRF0703A-680M
SRF0703A-820M
SRF0703A-101M
SRF0703A-151M
SRF0703A-221M
SRF0703A-331M
L (μH) ±20 %
(A) L (μH) ±20 % Max.
8.2
10
0.0772 2.19 2.66
0.0826 2.08 2.47
34.1
39.6
0.306
0.342
0.47
0.62
1.0
1.1
1.33
1.24
1.04
15
0.119
0.15
1.83 2.05
1.62 1.67
1.31 1.35
1.08 1.14
0.89 0.96
0.86 0.89
0.73 0.79
0.58 0.65
0.52 0.53
0.42 0.44
59.6
0.916 1.03
0.811 0.83
0.653 0.68
0.542 0.57
0.444 0.48
22
89.5
33
0.24
140.5
194.2
289.3
324.7
397.6
608.2
922.6
1335
47
0.338
0.507
0.61
1.28
1.92
2.28
2.64
3.63
5.5
68
Materials
82
0.43
0.44
Core..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging..................1500 pcs. per reel
100
150
220
330
0.715
0.986
1.48
0.367 0.39
0.289 0.32
0.26
0.27
2.16
8.25
0.211 0.22
Product Dimensions
Electrical Schematics
7.6
MAX.
(.299)
1
2
N2
4
1
2
1
2
N2
4
DOT
INDICATES
TERMINAL 1
7.6
(.299)
MAX.
N1
N1
N2
N1
8R2
3
3
4
3
SERIES
PARALLEL
3.4 0.2
(.134 .008)
Recommended Layout
3.0
(.118)
3.0
(.118)
0.4
(.016)
0.4
(.016)
2.9
TYP.
(.114)
4
3
2
1
4
2
3
1
4
2
2.7
(.106)
TYP.
7.9
(.311)
7.9
(.311)
MM
(INCHES)
3
DIMENSIONS:
1.4
(.055)
1.4
(.055)
DUAL INDUCTOR MODE
SERIES MODE
1
1.0
TYP.
(.039)
MM
(INCHES)
DIMENSIONS:
*ꢀꢀRoHSꢀDirectiveꢀ2015/863,ꢀMarꢀ31,ꢀ2015ꢀandꢀAnnex.ꢀ
**Bournsꢀconsidersꢀaꢀproductꢀtoꢀbeꢀ“halogenꢀfree”ꢀifꢀ(a)ꢀtheꢀBromineꢀ(Br)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀ(b)ꢀtheꢀChlorineꢀꢀ
ꢀꢀꢀꢀ(Cl)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀandꢀ(c)ꢀtheꢀtotalꢀBromineꢀ(Br)ꢀandꢀChlorineꢀ(Cl)ꢀcontentꢀisꢀ1500ꢀppmꢀorꢀless.
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.
WARNING
Usersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀapplications.ꢀ
Cancer and Reproductive Harm
Theꢀproductsꢀdescribedꢀhereinꢀandꢀthisꢀdocumentꢀareꢀsubjectꢀtoꢀspecificꢀlegalꢀdisclaimersꢀasꢀsetꢀforthꢀonꢀtheꢀlastꢀpageꢀofꢀ
thisꢀdocument,ꢀandꢀatꢀwww.bourns.com/docs/legal/disclaimer.pdf.
www.P65Warnings.ca.gov