7.3
(.287)
12.7 ± 0.1
(.500 ± .004)
7.6
(.299)
TYP.
3.0
(.118)
2.5
(.098)
TYP.
3.0
(.118)
MAX.
10.3 ± 0.2
(.406 ± .008)
2.8
(.110)
2.5
(.098)
TYP.
101
Features
n Available in E6 series
n Low profile of 3 mm
n High current
n RoHS compliant*
Applications
n Input/output of DC/DC converters
n Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
SRR1003 Series - Shielded Power Inductors
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications 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 specific applications.
Test Voltage .......................................1 V
Reow Soldering .. 250 °C, 10 sec. max.
(In compliance with JEDEC,
J-STD-020C, Table 4-2)
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Soldering Heat
.......................... 250 °C, 10 sec. max.
Electrical Specications General Specications
Core ....................... Ferrite DR & RI core
Wire ............................Enameled copper
Base .....................................LCP E4008
Terminal ....................................Cu/Ni/Sn
Rated Current
...............Ind. drop of 10 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Packaging .................. 1000 pcs. per reel
Materials
Product Dimensions
Recommended Layout
DIMENSIONS:
MM
(INCHES)
**K-Factor: To calculate core 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.
7.3
(.287)
12.7 ± 0.1
(.500 ± .004)
7.6
(.299)
TYP.
3.0
(.118)
2.5
(.098)
TYP.
3.0
(.118)
MAX.
10.3 ± 0.2
(.406 ± .008)
2.8
(.110)
2.5
(.098)
TYP.
101
Bourns Part No.
Inductance
1 KHz
Q
Ref.
Test
Frequency
(MHz)
SRF
Min.
(MHz)
RDC
Max.
(Ω)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
FactorµH Tol. %
SRR1003-1R8M 1.8 ± 20 10 7.96M 100.0 0.038 3.00 8.00
145
SRR1003-2R2M 2.2 ± 20 11 7.96M 90.0 0.045 2.76 6.70
122
SRR1003-3R0M 3.0 ± 20 11 7.96M 70.0 0.062 2.20 5.60
106
SRR1003-3R9M 3.9 ± 20 10 7.96M 60.0 0.07 2.10 5.20
94
SRR1003-4R7M 4.7 ± 20 10 7.96M 50.0 0.078 1.90 4.60
84
SRR1003-7R5M 7.5 ± 20 10 7.96M 32.0 0.10 1.44 3.90
69
SRR1003-100M 10 ± 20 18 2.52M 28.0 0.145 1.24 3.30
55
SRR1003-120M 12 ± 20 20 2.52M 26.0 0.185 1.10 3.00
51
SRR1003-150M 15 ± 20 20 2.52M 25.0 0.20 1.02 2.60
48
SRR1003-180M 18 ± 20 20 2.52M 14.0 0.27 0.90 2.50
45
SRR1003-220M 22 ± 20 17 2.52M 22.0 0.30 0.85 2.10
41
SRR1003-270M 27 ± 20 17 2.52M 19.0 0.40 0.75 1.90
35
SRR1003-330M 33 ± 20 17 2.52M 17.0 0.45 0.70 1.70
32
SRR1003-390M 39 ± 20 18 2.52M 16.0 0.56 0.65 1.60
29
SRR1003-470M 47 ± 20 18 2.52M 14.0 0.65 0.60 1.40
27
SRR1003-560M 56 ± 20 15 2.52M 13.0 0.68 0.52 1.30
25
SRR1003-680M 68 ± 20 15 2.52M 11.0 0.80 0.48 1.20
22
SRR1003-820M 82 ± 20 20 2.52M 11.0 1.20 0.42 1.00
21
SRR1003-101M 100 ± 20 23 0.796M 10.0 1.40 0.40 0.95
19
SRR1003-121M 120 ± 20 22 0.796M 9.0 1.52 0.35 0.85
17
SRR1003-151M 150 ± 20 23 0.796M 8.0 1.80 0.32 0.80
15
SRR1003-181M 180 ± 20 20 0.796M 7.0 2.20 0.28 0.75
14
SRR1003-221M 220 ± 20 20 0.796M 6.0 2.20 0.26 0.65
12
SRR1003-271Y 270 ± 15 26 0.796M 4.1 3.10 0.22 0.60
11
SRR1003-331Y 330 ± 15 26 0.796M 3.6 3.60 0.20 0.55
10
SRR1003-391Y 390 ± 15 28 0.796M 2.6 4.60 0.18 0.46
9
SRR1003-471Y 470 ± 15 28 0.796M 2.1 5.10 0.16 0.45
8
Core Loss vs. Flux Density
Flux Density Bp-p (gauss)
10
100
1000
0.10
1
10 1000100
0.01
Core Loss (mW)
1 MHz
800 KHz
500 KHz
400 KHz
300 KHz
200 KHz
100 KHz
