5.8
(.228)
2.0
(.079)
2.0
(.079)
3.2
(.126)
REF.
REF. REF.
REF.
Features
■ Available in E6 series
■ Unit height of 2.8 mm
■ Current up to 7 A
■ RoHS compliant*
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
SRU8028 Series - Shielded SMD Power Inductors
* RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data
sheet can and do vary in different applications and
actual device performance may vary over time.
Users should verify actual device performance in their
specifi c applications.
Test Voltage .......................................1 V
Refl ow Soldering .. 230 °C, 50 sec. max.
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Soldering Heat
............................... 260 °C for 10 sec.
Rated Current
...................Ind. drop 35 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Electrical Specifi cations
Bourns
Part No.
Inductance
100 KHz
Q
Ref.
Test
Freq.
(MHz)
SRF
Typ.
(MHz)
RDC
(mΩ)
Irms
Max.
(A)
Isat
Typ.
(A)
**K-
Factor(µH)
Tol.
%
SRU8028-1R0Y 1.0 ± 30 12 7.96 66.0 10.1 7.00 5.50 389
SRU8028-2R5Y 2.5 ± 30 15 7.96 65.0 13.6 4.50 4.20 251
SRU8028-3R3Y 3.3 ± 30 12 7.96 60.0 17.5 3.60 3.50 222
SRU8028-4R7Y 4.7 ± 30 15 7.96 50.0 20.0 3.70 3.20 198
SRU8028-6R8Y 6.8 ± 30 13 7.96 40.0 34.0 2.80 2.50 164
SRU8028-8R2Y 8.2 ± 30 17 7.96 37.0 54.0 2.60 2.30 143
SRU8028-100Y 10.0 ± 30 22 2.52 35.0 45.0 2.60 2.20 130
SRU8028-120Y 12.0 ± 30 21 2.52 30.0 76.0 2.20 2.00 121
SRU8028-150Y 15.0 ± 30 20 2.52 25.0 66.0 2.00 1.70 108
SRU8028-220Y 22.0 ± 30 22 2.52 20.0 106 1.60 1.50 88
SRU8028-330Y 33.0 ±30 20 2.52 15.0 147 1.30 1.10 74
SRU8028-470Y 47.0 ±30 14 2.52 12.0 177 1.20 1.00 62
SRU8028-680Y 68.0 ±30 23 2.52 9.0 317 0.85 0.80 50
SRU8028-101Y 100.0 ±30 35 0.796 8.0 390 0.75 0.70 41
General Specifi cations
Core ....................Ferrite DR and RI core
Wire ............................Enameled copper
Terminal ....................................Ag/Ni/Sn
Packaging .................. 1500 pcs. per reel
Materials
Product Dimensions
Recommended Layout
*RoHS COMPLIANT
DIMENSIONS:
MM
(INCHES)
Electrical Schematic Inductor Connection
220
LCR METER
6.0
(.236)
TYP.
TYP.
8.0 ± 0.3
(.315 ± .012)
2.5
(.098)
TYP.
2.8
(.110)
TYP.
2.5
(.098)
2.8 ± 0.3
(.110 ± .012)
8.0 ± 0.3
(.315 ± .012)
Flux Density Bp-p (gauss)
100
1000
10000
10
10 100
1 MHz
800 KHz
500 KHz
400 KHz
300 KHz
200 KHz
100 KHz
1000
1
0.1
0.01
0.001
0.0001
Core Loss (mW)
**K-Factor: To calculate core fl ux density, Bp-p (gauss) = K x L(µH) x Δ I (peak-to-peak ripple current, A),
determine core loss from Core Loss vs. Flux Density plot.
Core Loss vs. Flux Density
