3.7
(.146)
1.1
(.043)
1.1
(.043)
2.0
(.079)
REF.
REF.
REF.
3.7
(.146)
1.1
(.043)
1.1
(.043)
REF.
REF.
REF.
REF.
2.0
(.079)
REF.
5.2 ± 0.2
(.205 ± .008)
2.8 ± 0.2
(.110 ± .008)
5.2 ± 0.2
(.205 ± .008)
3.9
(.154)
TYP.
TYP.
1.7
(.067)
TYP.
1.8
(.071)
TYP.
1.7
(.067)
Features
■ Available in E6 series
■ Unit height of 2.8 mm
■ Current up to 3.5 A
■ RoHS compliant*
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
SRU5028 Series - Shielded SMD Power Inductors
Test Voltage ....................................0.1 V
Refl ow Soldering .. 230 °C, 50 sec. max.
Operating Temp. .........-40 °C to +125 °C
(Temperature rise included)
Storage Temp. ............-40 °C to +125 °C
Resistance to Soldering Heat
............................... 260 °C for 10 sec.
Electrical Specifi cations General Specifi cations
Core ....................Ferrite DR and RI core
Wire ............................Enameled copper
Terminal ....................................Ag/Ni/Sn
Rated Current ..Ind. drop 35 % typ. at Isat
Temp. Rise.......40 °C max. at rated Irms
Packaging .................... 600 pcs. per reel
Materials
Product Dimensions
Recommended Layout
Electrical Schematic
Inductor Connection
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. (%)
SRU5028-1R2Y 1.2 ±30 10 7.96 200 16.8 3.50 3.40
453
SRU5028-2R2Y 2.2 ±30 10 7.96 130 21.0 3.20 2.50
313
SRU5028-3R3Y 3.3 ±30 10 7.96 90 24.0 2.80 2.10
272
SRU5028-4R7Y 4.7 ±30 9 7.96 50 32.0 2.20 1.85
214
SRU5028-6R8Y 6.8 ±30 10 7.96 55 42.0 2.00 1.55
177
SRU5028-100Y 10.0 ±30 18 2.52 25 63.0 1.80 1.40
151
SRU5028-150Y 15.0 ±30 18 2.52 23 108.0 1.10 1.00
123
SRU5028-220Y 22.0 ±30 15 2.52 18 162.0 0.95 0.85
95
SRU5028-330Y 33.0 ±30 15 2.52 16 203.0 0.80 0.68
87
SRU5028-470Y 47.0 ±30 13 2.52 13 285.0 0.70 0.62 69
SRU5028-680Y 68.0 ±30 13 2.52 10 450.0 0.56 0.46 59
SRU5028-101Y 100.0 ±30 15 0.796 8 625.0 0.47 0.42 50
LCR METER
*RoHS COMPLIANT
**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
10
100 1000
1 MHz
500 KHz
300 KHz
200 KHz
100 KHz
50 KHz
10000
1
0.1
Core Loss (mW)
DIMENSIONS:
MM
(INCHES)
* 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.
