Datasheet
Features
■ Height of 2.0 mm
■ Current rating up to 2.7 A
■ RoHS compliant*
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
SRR4018 Series - Shielded SMD Power Inductors
*RoHS COMPLIANT
Electrical Characteristics
Product Dimensions
Bourns
Part Number
Inductance
100 kHz
Q
Ref.
Test
Frequency
(MHz)
SRF
Typ.
(MHz)
DCR
Max.
(mΩ)
I rms
(A)
I sat
(A)(μH) Tol. %
SRR4018-1R0Y 1.0 ±30 9 7.960 219 35 2.70 2.60
SRR4018-1R8Y 1.8 ±30 9 7.960 105 58 2.35 2.20
SRR4018-2R2Y 2.2 ±30 8 7.960 90 55 2.10 2.10
SRR4018-2R7Y 2.7 ±30 8 7.960 78 60 2.03 1.95
SRR4018-3R3Y 3.3 ±30 8 7.960 61 65 1.95 1.80
SRR4018-3R9Y 3.9 ±30 8 7.960 60 75 1.82 1.65
SRR4018-4R7Y 4.7 ±30 8 7.960 55 82 1.72 1.50
SRR4018-5R6Y 5.6 ±30 7 7.960 57 90 1.64 1.25
SRR4018-6R8Y 6.8 ±30 8 7.960 49 100 1.50 1.15
SRR4018-8R2Y 8.2 ±30 7 7.960 40 135 1.40 1.10
SRR4018-100Y 10 ±30 10 2.520 38 150 1.30 1.00
SRR4018-120Y 12 ±30 9 2.520 32 170 1.15 0.90
SRR4018-150Y 15 ±30 8 2.520 30 220 1.03 0.82
SRR4018-180Y 18 ±30 7 2.520 30 280 0.92 0.75
SRR4018-220Y 22 ±30 7 2.520 29 300 0.88 0.65
SRR4018-270Y 27 ±30 7 2.520 23 370 0.77 0.60
SRR4018-330Y 33 ±30 7 2.520 21 420 0.73 0.50
SRR4018-390Y 39 ±30 8 2.520 19 540 0.64 0.48
SRR4018-470Y 47 ±30 8 2.520 20 600 0.62 0.45
SRR4018-560Y 56 ±30 8 2.520 15 820 0.52 0.40
SRR4018-680Y 68 ±30 7 2.520 13 860 0.50 0.38
SRR4018-820Y 82 ±30 8 2.520 13 1200 0.43 0.32
SRR4018-101Y 100 ±30 10 0.796 12 1350 0.40 0.30
SRR4018-121Y 120 ±30 11 0.796 10 1950 0.33 0.28
SRR4018-151Y 150 ±30 14 0.796 10 2600 0.28 0.26
SRR4018-181Y 180 ±30 10 0.796 10 4000 0.18 0.25
Recommended Layout
DIMENSIONS:
MM
(INCHES)
General Specifications
Test Voltage ................................... 0.1 V
Reflow Soldering ...230 °C, 50 sec. max.
Operating Temp. ............-40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Resistance to Soldering Heat
................................ 260 °C for 10 sec.
Moisture Sensitivity Level......................1
ESD Classification (HBM) ..................N/A
Materials
Core ............................................. Ferrite
Wire ........................... Enameled copper
Adhesive ............................... Epoxy resin
Terminal .................................... Ag/Ni/Sn
Rated Current
...................Ind. drop 35 % typ. at Isat
Temperature Rise ................... 30 °C typ.
at rated Irms
Packaging .................... 800 pcs. per reel
6R8
4.80 ± 0.20
(.189 ± .008)
4.80 ± 0.20
(.189 ± .008)
1.60
(.063)
TYP.
1.60
(.063)
TYP.
1.60
(.063)
TYP.
1.80 ± 0.20
(.071 ± .008)
5.30
(.209)
2.00
(.079)
REF.
1.50
(.059)
REF.
2.00
(.079)
REF.
1.80
(.071)
REF.
REF.
R
Inductance vs. Current
10
1
23 5710
2
23 57
DC Current (mA)
Inductance (
μ
H)
10
3
10
4
23 57
10
0
7
5
10
1
7
5
3
2
10
2
7
5
3
2
1R0
4R7
100
330
101
*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. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the
last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
WARNING Cancer and Reproductive Harm
www.P65Warnings.ca.gov