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Features
■ Shielded construction
■ Carbonyl powder core
■ High saturation current
1R0250
1
■ Inductance range: 0.10 to 33 µH
■ AEC-Q200 compliant
■ RoHS compliant* and halogen free**
SRP7028A Series - Shielded Power Inductors
Electrical Specifications @ 25 °C
Bourns
Part Number
Inductance
@ 100 KHz
/1V
L
Tol.
(μH)
(%)
Q (Min.)
@100
KHz / 1 V
General Specifications
SRF
(MHz)
Typ.
DCR
(mΩ)
Typ.
DCR
(mΩ)
Max.
Irms
(A)
Isat
(A)
SRP7028A-R10M
0.10
± 20
5
300
1.2
1.7
32.5
60
SRP7028A-R15Y
0.15
± 30
5
220
1.5
1.9
27
45
40
SRP7028A-R22Y
0.22
± 30
5
150
2.1
2.8
23
SRP7028A-R33M
0.33
± 20
10
140
3.5
3.9
20
32
SRP7028A-R47M
0.47
± 20
10
80
4
4.2
17.5
26
25.5
SRP7028A-R56M
0.56
± 20
15
70
4.7
5.0
16.5
SRP7028A-R68M
0.68
± 20
15
67
4.8
5.5
15.5
25
SRP7028A-R75M
0.75
± 20
15
65
5.5
6.6
14.5
24.5
SRP7028A-R82M
0.82
± 20
15
61
6.7
8.0
13
24
SRP7028A-1R0M
1.0
± 20
20
58
8.3
10.0
11
22
SRP7028A-1R5M
1.5
± 20
20
38
13
15.0
9
18
SRP7028A-1R8M
1.8
± 20
20
36
14
17.0
8.5
16
SRP7028A-2R2M
2.2
± 20
20
32
18
20.0
8
14
SRP7028A-2R5M
2.5
± 20
20
30
20
22.0
7
13
SRP7028A-3R3M
3.3
± 20
20
25
28
30.0
6
12
SRP7028A-4R7M
4.7
± 20
20
21
37
40.0
5.5
10
SRP7028A-5R6M
5.6
± 20
20
19
43
48.0
5
9
SRP7028A-6R8M
6.8
± 20
20
18
54
60.0
4.5
8
SRP7028A-8R2M
8.2
± 20
20
17
64
68.0
4
7.5
SRP7028A-100M
10
± 20
20
14
75
85.0
3.5
6
SRP7028A-150M
15
± 20
20
12
107
123.0
3.0
4
SRP7028A-220M
22
± 20
20
10
165
190.0
2.0
3.5
SRP7028A-330M
33
± 20
20
8
200
240.0
2.0
2.5
Terminal
Type
Test Voltage ....................................1.0 V
Test Frequency ......................... 100 KHz
Operating Temperature
................................-55 °C to +150 °C
(Temperature rise included)
Storage Temperature .. -55 °C to +150 °C
Rated Current
............ Inductance drops 20 % at Isat
Temperature Rise .....40 °C at rated Irms
Moisture Sensitivity Level ..................... 1
ESD Classification (HBM)................. N/A
1 Circuit design, component, PCB trace
size and thickness, airflow and other
cooling provisions all affect the part
temperature. Part temperature should be
verified in the end application.
Lead
Frame
Materials
Core.............................Carbonyl powder
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging..... 1000 pcs. per 13-inch reel
Please consult Bourns® Model SRP-A
Series Visual Inspection Guide for detailed
construction, processing and testing
information.
Product Dimensions
Lead Frame Terminal
How to Order
Recommended Layout
SRP7028A - 100M
Model
7.3 ± 0.3
(.287 ± .012)
6.7 ± 0.3
(.264 ± .012)
8.4
(.331)
Value Code (see table)
3.5
(.138)
6.6 ± 0.3
(.260 ± .012)
2R2
1150
2.5
(.098)
DIMENSIONS:
MM
(INCHES)
2.8 ± 0.2
(.110 + .008)
1.8 ± 0.3
(.071 ± .012)
3.0 ± 0.3
(.118 ± .012)
WARNING Cancer and Reproductive Harm www.P65Warnings.ca.gov
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine
(Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
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)
SRP7028A Series - Shielded Power Inductors
L vs. I Charts
48
0
20
10
DC Current (A)
48
0.1
24
0
32
0.52
80
0.39
60
0.26
40
0.13
20
0
0
10
5
DC Current (A)
48
0.2
24
0
15
20
25
96
0.66
72
0.44
48
0.22
24
0
5
10
90
0.6
60
0.3
30
0
10
15
20
Inductance (μH)
0.9
Temperature Rise (°C)
Inductance (μH)
1.2
5
1.32
90
0.88
60
30
4
8
12
16
5
10
40
0.6
20
0
12
0
15
2.1
72
1.4
48
0.7
24
0
6
9
DC Current (A)
25
SRP7028A-R82M
Temperature Rise (°C)
0
30
150
0.88
120
0.66
90
0.44
60
30
0
10
5
15
20
25
SRP7028A-1R8M
2.5
0
30
150
2.0
120
1.5
90
1.0
60
0.5
30
0
0
4
8
12
16
12
0
15
SRP7028A-3R3M
4.5
120
96
3
20
0
0
20
2.8
0
15
0
20
DC Current (A)
SRP7028A-2R5M
3.5
Inductance (μH)
1.2
9
24
0.22
150
120
0
Temperature Rise (°C)
Inductance (μH)
1.8
60
6
48
0.16
DC Current (A)
0
100
80
DC Current (A)
25
0.44
0
25
2.4
3
0.32
DC Current (A)
SRP7028A-2R2M
0
72
1.10
0
30
1.76
DC Current (A)
3.0
20
SRP7028A-1R5M
2.20
150
120
0
96
0.48
DC Current (A)
SRP7028A-1R0M
1.5
15
120
0.64
0
120
0.88
DC Current (A)
0
45
DC Current (A)
0
0
30
36
0
Inductance (μH)
10
25
0
30
Inductance (μH)
72
0.4
Inductance (μH)
0.6
Temperature Rise (°C)
Inductance (μH)
96
5
20
SRP7028A-R75M
1.10
120
0.8
0
15
27
SRP7028A-R56M
DC Current (A)
SRP7028A-R68M
1.0
18
9
0.80
Inductance (μH)
24
0
40
100
Inductance (μH)
0.2
16
0
Temperature Rise (°C)
72
Inductance (μH)
0.3
Temperature Rise (°C)
Inductance (μH)
96
8
24
0
DC Current (A)
SRP7028A-R47M
0.65
120
0.4
0
40
48
DC Current (A)
SRP7028A-R33M
0.5
30
72
0.12
0.06
0
50
Temperature Rise (°C)
36
0
Temperature Rise (°C)
24
12
24
0.04
0
60
Temperature Rise (°C)
0
48
0.18
Temperature Rise (°C)
24
0
72
0.08
96
Temperature Rise (°C)
0.03
0.12
0.24
Temperature Rise (°C)
48
96
120
150
3.6
120
2.7
90
1.8
60
0.9
30
0
0
3
6
9
12
Temperature Rise (°C)
72
0.06
0.16
SRP7028A-R22Y
0.30
120
Inductance (μH)
0.09
Inductance (μH)
96
Temperature Rise (°C)
Inductance (μH)
0.12
SRP7028A-R15Y
0.20
120
Temperature Rise (°C)
SRP7028A-R10M
0.15
0
15
DC Current (A)
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.
SRP7028A Series - Shielded Power Inductors
L vs. I Charts (Continued)
40
1.4
20
0
6
0
0
10
8
20
0
2
SRP7028A-8R2M
90
4.8
60
2.4
30
0
4
6
Inductance (μH)
7.2
Temperature Rise (°C)
Inductance (μH)
9.6
2
8
9
60
6
40
3
20
1.2
2.4
3.6
4.8
12
48
6
24
0
Inductance (μH)
72
0
4.0
3.2
80
60
19.2
40
9.6
20
0
0.6
1.2
1.8
8
SRP7028A-150M
100
16
80
12
60
8
40
4
20
0
1
2
3
4
0
5
100
28.8
0
6
0
0
6.0
36.4
DC Current (A)
4
0
10
DC Current (A)
SRP7028A-330M
48.0
Temperature Rise (°C)
Inductance (μH)
96
2.4
2
30
100
80
0
120
18
1.6
30
0
DC Current (A)
24
0.8
60
DC Current (A)
0
0
10
SRP7028A-220M
0
0
10
12
DC Current (A)
30
8
SRP7028A-100M
15
150
120
0
6
4
2
DC Current (A)
DC Current (A)
12.0
4
90
0
Inductance (μH)
4
40
Temperature Rise (°C)
2
3.2
1.6
120
6
2.4
Temperature Rise (°C)
0
4.8
60
150
8
Temperature Rise (°C)
2.8
80
Temperature Rise (°C)
60
6.4
SRP7028A-6R8M
10
100
Inductance (μH)
4.2
Inductance (μH)
Temperature Rise (°C)
Inductance (μH)
80
5.6
SRP7028A-5R6M
8.0
100
Temperature Rise (°C)
SRP7028A-4R7M
7.0
0
3.0
DC Current (A)
Electrical Schematic
Soldering Profile
PRE-HEATING
SOLDERING
NATURAL
COOLING
TP (260 °C / 10 seconds max.)
Temperature (°C)
tp (245 °C / 20~40 seconds)
217
200
60 ~ 150 seconds
150
60 ~ 180 seconds
25
480 seconds max.
Time (Seconds)
REFLOW TIMES: 3 MAX.
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.
SRP7028A Series - Shielded Power Inductors
Packaging Specifications
330
DIA.
(12.99)
2.0 ± 0.5
(.079 ± .020)
13.5 ± 0.5
(.531 ± .020)
DIA.
100.0 ± 2.0
(3.937 ± .079)
13.5 ± 0.5
DIA.
(.531 ± .020)
16.0 ± 0.5
(.630 ± .020)
1.75
(.069)
2.0
(.079)
0.35 ± 0.05
(.014 ± .002)
1.5 ± 0.1
DIA.
(.059 ± .004)
7.8 ± 0.1
(.307 ± .004)
Marking
Date Code
USER DIRECTION OF FEED
Marking
12.0 ± 0.1
(.472 ± .004)
Date Code
Marking
Date Code
Marking
Date Code
Marking
16.0 ± 0.3
(.630 ± .012)
4.0
(.157)
Date Code
7.5 ± 0.1
(.295 ± .004)
16
(.630)
3°
7.1 ± 0.1
(.280 ± .004)
3.3 ± 0.1
(.130 ± .004)
DIMENSIONS:
MM
(INCHES)
QTY: 1000 PCS. PER REEL
Asia-Pacific: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
REV. 11/19
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
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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