PL
IA
NT
Features
■
Available in E6 series
■
Unit height of 2.8 mm
■
Current up to 7 A
Applications
■
Input/output of DC/DC converters
■
Power supplies for:
*R
oH
S
CO
M
100
LE
A
D
FR
EE
■
RoHS compliant*
• Portable communication equipment
• Camcorders
• LCD TVs
Ro VE LEA
HS RS D
CO ION FRE
M SA E
PL R
IA E
NT
*
SRU1028 Series - Shielded SMD Power Inductors
& *R
AE oH
C- S C
Q2 O
00 MP
QU LI
AL ANT
IF
IE
D
Bourns
Part Number
AP *Ro
PR HS
OV C
ED OM
(S PL
el IAN
ec T
tM
od
el
s)
SRU1028-1R0Y
Inductance
@ 100 KHz
Tol.
L (µH)
(%)
Q
Ref.
Test
Freq.
(MHz)
SRF
Min.
(MHz)
RDC
(mΩ)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
Factor
SRU1028-1R5Y
1.0
SRU1028-2R2Y
SRU1028-3R3Y
SRU1028-4R7Y
1.5
±30
2.2
3.3
4.7
±30
14
±30
±30
±30
12
7.96
12
14
12
12
12
7.96
100.0
80.0
65.0
55.0
40.0
4.9
7.3
15
11
7.00
7.96
7.96
7.96
6.50
5.30
4.60
8.00
315
6.50
4.80
4.30
245
200
169
SRU1028-6R8Y
SRU1028-100Y
SRU1028-8R2Y
SRU1028-120Y
SRU1028-150Y
SRU1028-220Y
SRU1028-330Y
SRU1028-470Y
SRU1028-560Y
SRU1028-680Y
SRU1028-820Y
SRU1028-101Y
SRU1028-121Y
SRU1028-151Y
6.8
10.0
8.2
±30
±30
7.96
15.0
22.0
33.0
47.0
56.0
68.0
82.0
100.0
120.0
150.0
12.0
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
20
7.96
30.0
16
15
28
4.50
22
26
26
24
20
22
20
20
20
18
18
7.96
28.0
3.50
3.80
147
116
93
82
71
60
49
43
39
36
33
31
27
2.52
2.52
2.52
2.52
2.52
2.52
2.52
0.796
0.796
0.796
2.52
25.0
23.0
22.0
16.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
40
3.30
3.00
130
105
Test Voltage .......................................1 V
.. 230 °C, 50 sec. max.
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.
Moisture Sensitivity Level ...................... 1
.................. N/A
Materials
Core ....................Ferrite DR and RI core
Wire ............................Enameled copper
Terminal ....................................Ag/Ni/Sn
Rated Current
...................Ind. drop 35 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Packaging .................. 1000 pcs. per reel
Product Dimensions
10.0 ± 0.3
(.394 ± .012)
10.0 ± 0.3
(.394 ± .012)
10.0 ± 0.3
(.394 ± .012)
AE
C
69
104
139
167
208
232
323
365
428
518
70
2.80
2.70
2.40
2.00
1.60
1.25
1.30
1.10
1.00
0.90
0.85
0.65
0.70
2.40
2.30
2.00
1.40
1.20
1.10
1.00
0.90
0.85
0.80
0.70
0.65
Δ
I (peak-to-peak ripple current, A),
determine core loss from
Core Loss vs. Flux Density
plot.
Core Loss vs. Flux Density
10000
SRU1028
10.0 ± 0.3
(.394 ± .012)
2.8 ± 0.3
(.110 ± .012)
2.8 ± 0.3
(.110 ± .012)
7.4
TYP.
(.291)
3.4
(.134)
TYP.
3.4
(.134)
TYP.
3.2
(.126)
TYP.
3.4
TYP.
(.134) 3.2
(.126)
TYP.
3.4
TYP.
(.134)
1000
7.4
TYP.
(.291)
Core Loss (mW)
100
1 MHz
500 KHz
300 KHz
200 KHz
100 KHz
50 KHz
10
1
0.1
100
1000
10000
Recommended Layout
Flux Density Bp-p (gauss)
7.2
(.283)
REF.
7.2
(.283)
REF.
1.8
(.071)
REF.
1.8
(.071)
REF.
1.8
(.071)
REF.
1.8
(.071)
REF.
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
* 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
DIMENSIONS:
MM
(INCHES)
3.6
(.142)
REF.
SRU1028
Series
Shielded SMD
SRF0504
Series -
- Line Filter
Power Inductors
Electrical Schematic
Inductor Connection
3.6
(.142)
REF.
LCR METER
330
DIA.
(12.99)
2.0 ± 0.5
(.079 ± .020)
30.4
(1.20)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0
(1.969)
21.0 ± 0.8
(.827 ± .031)
13.0 ± 0.5
DIA.
(.512 ± .020)
26
(1.02)
4
(.157)
24
(.945)
END
START
16
(.63)
NO COMPONENT
160
(6.299)
NO COMPONENT
COMPONENTS
400
(15.748)
USER DIRECTION OF FEED
QTY: 1000 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
REV. 03/18
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.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
its affiliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
without notice. Users should check for and obtain the latest relevant information and verify that such information is current
and complete before placing orders for Bourns
®
products.
The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
product in a user application may vary
from the data sheet characteristics and parameters due to (i) the combination of the Bourns
®
product with other components
in the user’s application, or (ii) the environment of the user application itself. The characteristics and parameters of a Bourns
®
product also can and do vary in different applications and actual performance may vary over time. Users should always verify
the actual performance of the Bourns
®
product in their specific devices and applications, and make their own independent
judgments regarding the amount of additional test margin to design into their device or application to compensate for
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Unless Bourns has explicitly designated an individual Bourns
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PDF:
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C1753 05/17/18R
