Features
n Available in E12 values
n Inductance range as low as 1.1 µH
n Current rating to 10.2 amps
n RoHS compliant*
Applications
n Input/output of DC/DC converters
n Power supplies for:
- Portable communication equipment
- Camcorders
- LCD televisions
- Car radios
SRR1280 Series - Shielded SMD Power Inductors
Test Voltage ....................................0.1 V
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.
Temperature Rise
....................40 °C max. at rated I rms
Inductance Drop .......... 25 % typ. at I sat
Electrical Specications General Specications
Core ............................ Ferrite DR and RI
Wire ............. Enameled copper wire 130
Terminal ....................................Cu/Ni/Sn
Packaging .................... 400 pcs. per reel
Materials
Product Dimensions
Recommended Layout
DIMENSIONS:
MM
(INCHES)
*RoHS COMPLIANT
*RoHS COMPLIANT
& AEC-Q200 QUALIFIED
*RoHS COMPLIANT
AEC APPROVED (Select Models)
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.
470
Bourns
Part Number
Inductance
100 kHz
Q
(Typ.)
Test
Freq.
(MHz)
SRF
Typ.
(MHz)
RDC
Max.
(mW)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
Factor
(µH) Tol. (%)
SRR1280-1R1Y 1.1 ± 30 26 7.96 85 6.5 10.20 14.00 94
SRR1280-1R2Y 1.2 ± 30 28 7.96 83 18.0 6.60 7.80 90
SRR1280-1R4Y 1.4 ± 30 24 7.96 80 9.8 9.80 12.00 90
SRR1280-2R4Y 2.4 ± 30 20 7.96 45 10.0 9.20 10.50 62
SRR1280-3R3Y 3.3 ± 30 20 7.96 40 12.0 8.80 9.80 54
SRR1280-3R5Y 3.5 ± 30 20 7.96 36 12.0 8.80 9.80 56
SRR1280-4R5Y 4.5 ± 30 20 7.96 34 13.5 8.50 9.00 48
SRR1280-4R7Y 4.7 ± 30 22 7.96 30 15.5 8.20 8.80 48
SRR1280-5R6Y 5.6 ± 30 20 7.96 24 16.0 8.00 8.50 44
SRR1280-6R1Y 6.1 ± 30 20 7.96 23 18.0 6.60 7.80 43
SRR1280-6R8Y 6.8 ± 30 20 7.96 22 18.5 7.60 8.00 39
SRR1280-7R5Y 7.5 ± 30 16 7.96 21 17.5 6.40 7.00 37
SRR1280-7R6Y 7.6 ± 30 15 7.96 21 20.0 5.90 6.50 35
SRR1280-8R2Y 8.2 ± 30 22 2.52 20 20.5 6.20 6.80 35
SRR1280-100M 10.0 ± 20 24 2.52 17 19.5 6.00 6.30 32
SRR1280-120M 12.0 ± 20 26 2.52 15 28.0 5.60 6.60 30
SRR1280-150M 15.0 ± 20 26 2.52 13 28.5 5.20 5.00 28
SRR1280-180M 18.0 ± 20 24 2.52 12 35.0 4.80 4.60 23
SRR1280-220M 22.0 ± 20 20 2.52 11 38.6 4.30 4.10 21
SRR1280-270M 27.0 ± 20 26 2.52 10 52.0 3.90 3.70 20
SRR1280-330M 33.0 ± 20 28 2.52 9.5 57.0 3.50 3.30 17
SRR1280-390M 39.0 ± 20 24 2.52 8.5 70.0 3.20 3.10 16
SRR1280-470M 47.0 ± 20 24 2.52 7.5 80.0 2.90 2.80 15
SRR1280-560M 56.0 ± 20 24 2.52 7.0 100.0 2.60 2.50 13
SRR1280-680M 68.0 ± 20 20 2.52 6.5 120.0 2.40 2.30 12
SRR1280-820M 82.0 ± 20 20 0.796 5.0 130.0 2.30 2.20 11
SRR1280-101M 100.0 ± 20 18 0.796 4.5 150.0 2.10 2.00 10
SRR1280-121K 120.0 ± 10 16 0.796 4.3 200.0 1.95 1.95 9
SRR1280-151K 150.0 ± 10 24 0.796 4.1 270.0 1.85 1.90 8
SRR1280-181K 180.0 ± 10 24 0.796 4.0 300.0 1.75 1.88 7
SRR1280-221K 220.0 ± 10 24 0.796 3.4 400.0 1.60 1.70 7
SRR1280-271K 270.0 ± 10 20 0.796 3.1 450.0 1.20 1.60 6
SRR1280-331K 330.0 ± 10 18 0.796 2.9 600.0 1.10 1.40 5
SRR1280-391K 390.0 ± 10 20 0.796 2.7 680.0 1.00 1.40 5
SRR1280-471K 470.0 ± 10 20 0.796 2.2 880.0 0.90 1.25 5
SRR1280-561K 560.0 ± 10 20 0.796 2.0 960.0 0.80 1.15 4
SRR1280-681K 680.0 ± 10 26 0.796 1.7 1300.0 0.75 0.97 4
SRR1280-821K 820.0 ± 10 20 0.796 1.4 1500.0 0.70 0.94 4
SRR1280-102K 1000.0 ± 10 40 0.252 1.3 1700.0 0.68 0.80 3
Electrical Schematic
100
12.5 ± 0.3
(.492 ± .012)
12.5 ± 0.3
(.492 ± .012)
2.9
(.114)
REF.
2.9
(.114)
REF.
5.4
(.213)
REF.
7.5 ± 0.5
(.295 ± .020)
5.0 ± 0.3
(.197 ± .012)
7.0
(.276)
TYP.
6.8
(.268)
REF.
100
12.5 ± 0.3
(.492 ± .012)
12.5 ± 0.3
(.492 ± .012)
2.9
(.114)
REF.
2.9
(.114)
REF.
5.4
(.213)
REF.
7.5 ± 0.5
(.295 ± .020)
5.0 ± 0.3
(.197 ± .012)
7.0
(.276)
TYP.
**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.
