Features
n Available in E12 values
n Height of 4.5 mm maximum
n Current rating to 9.3 amps
n RoHS compliant*
Applications
n Input/output of DC/DC converters
n Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
SRR1240 Series - Shielded SMD 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 ....................................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.
Electrical Specications
Bourns Part No.
Inductance
100 KHz
Q
Typ.
Test
Freq.
(MHz)
SRF
Typ.
(MHz)
RDC
Max.
(mΩ)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
Factor
(µH) Tol. %
SRR1240-1R0Y 1.0 ± 30 10 7.96 85 7.0 9.30 9.20 160
SRR1240-1R5Y 1.5 ± 30 16 7.96 80 9.5 9.20 9.00 131
SRR1240-2R4Y 2.4 ± 30 10 7.96 54 11.5 8.00 7.80 111
SRR1240-3R3Y 3.3 ± 30 14 7.96 43 15.0 6.80 6.50 96
SRR1240-3R9Y 3.9 ± 30 14 7.96 39 15.0 6.35 6.20 96
SRR1240-4R7M 4.7 ± 20 16 7.96 33 18.0 6.00 5.60 85
SRR1240-5R6M 5.6 ± 20 14 7.96 35 20.0 5.40 5.10 76
SRR1240-6R8M 6.8 ± 20 14 7.96 34 23.0 5.20 4.70 69
SRR1240-8R2M 8.2 ± 20 10 7.96 32 27.0 4.50 4.30 63
SRR1240-100M 10.0 ± 20 17 2.52 27 32.0 4.00 4.00 58
SRR1240-120M 12.0 ± 20 16 2.52 25 38.0 3.80 3.60 50
SRR1240-150M 15.0 ± 20 16 2.52 22 47.0 3.50 3.20 47
SRR1240-180M 18.0 ± 20 14 2.52 20 55.0 3.20 3.00 41
SRR1240-220M 22.0 ± 20 18 2.52 16 67.5 3.00 2.60 37
SRR1240-270M 27.0 ± 20 16 2.52 15.5 85.0 2.55 2.35 34
SRR1240-330M 33.0 ± 20 19 2.52 15 97.0 2.30 2.10 31
SRR1240-390M 39.0 ± 20 14 2.52 14 120.0 2.15 2.00 28
SRR1240-470M 47.0 ± 20 19 2.52 13 135.0 2.00 1.80 26
SRR1240-560M 56.0 ± 20 16 2.52 12 170.0 1.80 1.65 24
SRR1240-680M 68.0 ± 20 19 2.52 11 200.0 1.50 1.50 22
SRR1240-820M 82.0 ± 20 16 2.52 10 250.0 1.35 1.35 20
SRR1240-101M 100.0 ± 20 14 0.796 8 300.0 1.25 1.20 18
SRR1240-121K 120.0 ± 10 12 0.796 7.8 370.0 1.20 1.15 16
SRR1240-151K 150.0 ± 10 12 0.796 7.5 440.0 1.10 1.05 14
SRR1240-181K 180.0 ± 10 12 0.796 7.0 550.0 0.98 0.95 13
SRR1240-221K 220.0 ± 10 12 0.796 6.6 660.0 0.92 0.90 12
SRR1240-271K 270.0 ± 10 10 0.796 6.0 780.0 0.80 0.80 11
SRR1240-331K 330.0 ± 10 12 0.796 5.5 950.0 0.75 0.75 10
SRR1240-391K 390.0 ± 10 12 0.796 5.0 1150.0 0.70 0.65 9
SRR1240-471K 470.0 ± 10 12 0.796 4.5 1350.0 0.62 0.60 8
SRR1240-561K 560.0 ± 10 12 0.796 4.0 1500.0 0.55 0.52 7
SRR1240-681K 680.0 ± 10 14 0.796 3.8 2000.0 0.50 0.48 7
SRR1240-821K 820.0 ± 10 10 0.796 3.5 2400.0 0.45 0.42 6
SRR1240-102K 1000.0 ± 10 16 0.252 2.8 3000.0 0.42 0.40 6
General Specications
Core ............................... Ferrite DR & RI
Wire ............. Enameled copper wire 130
Terminal ....................................Cu/Ni/Sn
Rated Current
...............Ind. drop of 25 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Packaging .................... 800 pcs. per reel
Materials
Product Dimensions
Recommended Layout
DIMENSIONS:
MM
(INCHES)
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.
4.0 ± 0.5
(.157 ± .020)
5.0 ± 0.3
(.197 ± .012)
7.0
(.276)
TYP.
6.8
(.268)
REF.
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.
4.0 ± 0.5
(.157 ± .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.
