7.2
(.283)
1.8
(.071)
1.8
(.071)
3.6
(.142)
REF.
REF. REF.
REF.
7.4
(.291)
TYP.
TYP.
10.0 ± 0.3
(.394 ± .012)
3.4
(.134)
TYP.
3.2
(.126)
TYP.
3.4
(.134)
2.8 ± 0.3
(.110 ± .012)
10.0 ± 0.3
(.394 ± .012)
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
SRU1028 Series - Shielded SMD Power Inductors
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.
Electrical Specifi cations @ 25 °C General Specifi cations
Core ....................Ferrite DR and RI core
Wire ............................Enameled copper
Terminal ....................................Ag/Ni/Sn
Rated Current
...................Ind. drop 35 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Packaging .................. 1000 pcs. per reel
Materials
Product Dimensions
Recommended Layout
DIMENSIONS:
MM
(INCHES)
*RoHS COMPLIANT
* 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.
Bourns
Part Number
Inductance
@ 100 KHz
Q
Ref.
Test
Freq.
(MHz)
SRF
Min.
(MHz)
RDC
(mΩ)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
Factor
L (µH)
Tol.
(%)
SRU1028-1R0Y 1.0 ±30 14 7.96 100.0 4.9 7.00 8.00
315
SRU1028-1R5Y 1.5 ±30 12 7.96 80.0 7.3 6.50 6.50
245
SRU1028-2R2Y 2.2 ±30 12 7.96 65.0 11 5.30 4.80
200
SRU1028-3R3Y 3.3 ±30 14 7.96 55.0 15 4.60 4.30
169
SRU1028-4R7Y 4.7 ±30 12 7.96 40.0 16 4.50 3.80
147
SRU1028-6R8Y 6.8 ±30 12 7.96 30.0 15 3.50 3.00
130
SRU1028-8R2Y 8.2 ±30 12 7.96 28.0 28 3.30 2.70
116
SRU1028-100Y 10.0 ±30 20 7.96 25.0 40 2.80 2.40
105
SRU1028-120Y 12.0 ±30 22 2.52 23.0 70 2.40 2.30
93
SRU1028-150Y 15.0 ±30 26 2.52 22.0 69 2.00 2.00
82
SRU1028-220Y 22.0 ±30 26 2.52 16.0 104 1.60 1.40 71
SRU1028-330Y 33.0 ±30 24 2.52 12.0 139 1.25 1.20 60
SRU1028-470Y 47.0 ±30 20 2.52 11.0 167 1.30 1.10 49
SRU1028-560Y 56.0 ±30 22 2.52 10.0 208 1.10 1.00 43
SRU1028-680Y 68.0 ±30 20 2.52 9.0 232 1.00 0.90 39
SRU1028-820Y 82.0 ±30 20 2.52 8.0 323 0.90 0.85 36
SRU1028-101Y 100.0 ±30 20 0.796 7.0 365 0.85 0.80 33
SRU1028-121Y 120.0 ±30 18 0.796 6.0 428 0.65 0.70 31
SRU1028-151Y 150.0 ±30 18 0.796 5.0 518 0.70 0.65 27
**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
Flux Density Bp-p (gauss)
100
1000
10000
10
100 1000
1 MHz
500 KHz
300 KHz
200 KHz
100 KHz
50 KHz
10000
1
0.1
Core Loss (mW)
