Features
This series is currently available,
but not recommended for new
designs. The newer SRP1038A
series is recommended.
n Shielded construction
n Unit height of 4.2 mm
2R2 5
172
n Inductance range: 0.15 to 15 μH
n Current up to 34 A
n RoHS compliant*
SRP1040 Series - Shielded Power Inductors
General Specifications
Test Voltage........................................1 V
Test Frequency.......................... 100 KHz
Reflow Soldering... 230 °C; 50 sec. max.
Operating Temperature
.................................-55 °C to +150 °C
(Temperature rise included)
Storage Temperature
.................................-55 °C to +150 °C
Resistance to Soldering Heat
.............................. +260 °C for 10 sec.
Electrical Specifications
Bourns Part No.
Inductance
L (μH) ±20 %
I rms
(A)
I sat
(A)
DCR
(mΩ) Max.
SRP1040-R20M
0.20
32
40
1.0
SRP1040-R15M
0.15
SRP1040-R36M
34
0.36
SRP1040-R39M
28
0.39
SRP1040-R47M
SRP1040-R56M
SRP1040-R68M
SRP1040-R75M
SRP1040-1R0M
SRP1040-1R2M
1.2
SRP1040-1R5M
SRP1040-1R7M
SRP1040-2R2M
SRP1040-2R5M
3.9
9.0
15
12
5.6
7.0
10
14
8.0
6.8
24
9.0
35
8.2
5.0
8.0
SRP1040-150M
15
5.0
7.0
5.0
2R2
1725
10.5
(0.413)
MAX.
16
11
SRP1040-8R2M
10
14
12
4.2
(.165)
MAX.
4.0
(.157)
MAX.
11.8
MAX.
(0.465)
10.7 ± 0.5
(0.421 ± 0.020)
10
13
6.5
Product Dimensions
8.6
8.7
4.7
SRP1040-100M
7.5
17
14
SRP1040-4R7M
SRP1040-6R8M
12
11.5
3.3
SRP1040-5R6M
7.5
18
2.5
SRP1040-3R3M
SRP1040-3R9M
4.7
20
15
2.2
3.5
24
15
1.7
3.0
28
18
1.5
2.5
30
20
Materials
Core...................................................Iron
Wire.............................Enameled copper
Terminal.........................................Cu/Sn
Rated Current......Ind. drops 20 % at Isat
Temperature Rise......40 °C at rated Irms
Packaging........ 900 pcs. per 13-inch reel
2.4
28
21
1.0
1.9
32
22
0.80
1.9
36
23
0.75
SRP1040-R80M
1.6
32
25
0.68
1.4
38
23
0.56
1.4
32
26
0.50
1.3
40
24
0.47
SRP1040-R50M
40
33
57
10.0 ± 0.5
(0.394 ± 0.020)
Soldering Profile
Maximum of 10 seconds
between +255 °C and +260 °C
225
190°C
175
220 °C
60 seconds
maximum
Ramp Down
5 °C/second
150 °C
125
120-150 seconds
75
25
275
260 °C peak
255 °C
Temperature (°C)
Temperature (°C)
275
10 seconds minimum
50
100
225
150
200
250
300
175
170 °C
2.2 ± 0.5
(0.087 ± 0.020)
150 °C
125
25
245 °C
2.9 ± 0.5
(0.114 ± 0.020)
Recommended Layout
Ramp Up
12.4
4 °C/second
maximum
(0.488)
0
50
100
4.5
(.177)
1.5
(.060)
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
60 seconds
maximum
DIMENSIONS:
4.5
(.177)
2.5
150
(.099)
5.4
(.213)
MM
(INCHES)
Electrical Schematic
R
5
10 seconds minimum
Time (Seconds)
Time (Seconds)
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
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.
183 °C
120 -150 seconds
75
Ramp Up
4 °C/second maximum
0
5 seconds maximum
at +245 °C
200
250
SRP1040 Series - Shielded Power Inductors
L vs. I Charts
27
36
10
0
40
DC Current (A)
40
0.12
20
22.8
0
38
30.4
0.75
0.60
0.45
50
40
30
0.30
0.15
0
20
10
0
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
SRP1040-R80M
0.6
60
0.5
0.4
50
40
0.3
30
0.2
20
0.1
0
10
0
32
20
24
28
Inductance (μH)
70
Temperature Rise (°C)
Inductance (μH)
0.7
SRP1040-1R5M
2.0
1.6
1.2
0.8
50
40
30
2
4
6
8
10
12
14
16
18
20
20
10
0
22
Inductance (μH)
70
60
16
20
24
28
32
36
SRP1040-R50M
0.56
80
0.7
0.6
70
60
0.42
60
0.5
0.4
0.3
50
40
30
0.28
40
0.2
0.1
0
20
10
0
40
0.14
20
0
4
8
12
16
20
24
28
32
36
SRP1040-R68M
0
0
7.2
14.4
DC Current (A)
80
0.9
60
0.6
40
0.4
0.2
0
20
10
0
33
9
12 15
18
21
24
27
30
SRP1040-R75M
1.2
50
40
30
6
0.3
0
100
90
80
1.4
1.2
70
60
1.0
0.8
0.6
50
40
30
0.4
0.2
0
20
10
0
30
6
9
12
15
18
21
24
27
20
0
6.2
12.4
SRP1040-1R7M
1.8
60
1.2
40
0.6
20
0
4
8
12
24.8
SRP1040-1R2M
3
100
2.4
80
1.8
60
1.2
40
0.6
0
20
0
4.4
8.8
13.2
16
SRP1040-2R2M
4.0
100
80
DC Current (A)
18.6
0
31
17.6
0
22
DC Current (A)
2.4
0
100
DC Current (A)
SRP1040-1R0M
3
0
36
80
1.0
0.8
0.6
3
28.8
1.5
70
60
0
21.6
100
100
90
1.4
1.2
3
Temperature Rise (°C)
Inductance (μH)
80
0
12
DC Current (A)
DC Current (A)
100
90
2.8
2.4
0.4
0
8
80
DC Current (A)
4.0
3.6
3.2
4
0.8
2.0
1.8
1.6
100
90
80
16
0
DC Current (A)
0.9
0.8
12
36
0.7
DC Current (A)
8
32
Inductance (μH)
70
60
4
28
SRP1040-R47M
2.0
1.8
1.6
Inductance (μH)
80
1.05
0.90
Temperature Rise (°C)
Inductance (μH)
100
90
1.20
0
24
DC Current (A)
SRP1040-R56M
1.0
20
100
90
DC Current (A)
1.50
1.35
16
Inductance (μH)
15.2
12
Inductance (μH)
7.6
8
Inductance (μH)
60
0.24
Inductance (μH)
0.36
Temperature Rise (°C)
Inductance (μH)
80
0
4
1.0
0.9
100
0.48
0
0
DC Current (A)
SRP1040-R39M
0.6
20
10
0
40
20
0
0
45
Temperature Rise (°C)
18
0.2
0.1
0
30
0.05
Temperature Rise (°C)
9
50
40
30
40
Temperature Rise (°C)
0
0.5
0.4
0.3
50
0.1
Temperature Rise (°C)
0
70
60
Temperature Rise (°C)
20
80
0.7
0.6
60
Temperature Rise (°C)
0.06
0.8
70
0.15
100
90
Temperature Rise (°C)
40
80
Temperature Rise (°C)
0.12
1.0
0.9
90
3.2
2.8
2.4
80
2.0
1.6
1.2
0.8
50
40
30
0.4
0
0
20
100
3.6
70
60
0
2
4
6
8
20
10
0
10 12 14 16 18 20 22 24
Temperature Rise (°C)
60
SRP1040-R36M
90
Inductance (μH)
0.18
100
0.2
Inductance (μH)
80
Temperature Rise (°C)
Inductance (μH)
0.24
SRP1040-R20M
0.25
100
Temperature Rise (°C)
SRP1040-R15M
0.3
DC Current (A)
DC Current (A)
80
70
4.8
80
e (°C)
90
6.4
5.6
H)
7.2
e (°C)
80
μH)
μH)
3.2
e (°C)
Specifications are subject to change without notice.
Users should verifySRP1040-2R5M
actual device performance in their specific applications.
SRP1040-3R9M
SRP1040-3R3M
4.0
6.0
100
8.0 legal disclaimers as set forth on the last100
The products
described herein and this document100
are subject to specific
page of this document,
and at www.bourns.com/docs/legal/disclaimer.pdf.
28
3
6
9
12
SRP1040-1R5M
2.0
1.6
1.2
0.8
50
40
30
8
10
12
14
16
18
20
1.8
60
1.2
40
0.6
20
SRP1040-2R5M
100
80
2.4
60
1.6
40
0.8
20
0
4
8
0
4
8
12
80
4.0
3.2
2.4
1.6
50
40
30
70
60
4
6
8
10
SRP1040-4R7M
14
12
20
10
0
16
SRP1040-5R6M
90
13.5
90
6.4
5.6
4.8
80
12.0
10.5
9.0
80
4.0
3.2
2.4
1.6
50
40
30
7.5
6.0
4.5
3.0
50
40
30
2
4
6
8
10
12
20
10
0
16
Inductance (μH)
7.2
0
SRP1040-8R2M
1.5
0
100
0
1
2
3
4
80
7.5
6.0
4.5
3.0
50
40
30
70
60
2
3
4
5
6
7
8
20
10
0
9
2
4
6
21
60
50
40
14
30
7
20
0
10
0
6.0
4.8
8
SRP1040-3R9M
4.8
80
3.6
60
2.4
40
1.2
20
0
3
6
9
12
SRP1040-6R8M
12
70
60
6.0
50
40
4.5
30
3.0
20
1
2
3
4
5
6
7
8
80
8
70
6
50
40
60
4
30
20
10
2
0
0
4
6
0
16
12
SRP1040-150M
25
100
10
0
9
90
80
20
70
15
60
10
50
40
30
5
0
20
0
1.4
100
70
90
80
56
70
30
60
20
50
40
30
10
20
0
10
0
5
1
2
3
DC Current (A)
2.8
4.2
5.6
10
0
7.0
DC Current (A)
SRP1040-330M
0
0
15
100
90
10
100
80
0
Temperature Rise (
100
DC Current (A)
40
Inductance (μH)
70
DC Current (A)
0
20
10
0
10 12 14 16 18 20 22 24
90
50
Temperature Rise (°C)
80
3.6
9
7.5
0
100
28
2.4
8
1.5
90
1.2
50
40
30
DC Current (A)
SRP1040-220M
0
7
9.0
DC Current (A)
35
6
10.5
Inductance (μH)
12.0
10.5
9.0
1
5
20
10
0
10 11 12
SRP1040-100M
12.0
Temperature Rise (°C)
90
0
2.0
1.6
1.2
0.8
70
60
DC Current (A)
13.5
1.5
0
80
0
100
70
60
DC Current (A)
15.0
90
DC Current (A)
15.0
70
60
100
3.2
2.8
2.4
6.0
100
6.4
5.6
4.8
2
0
22
DC Current (A)
90
0
17.6
SRP1040-2R2M
DC Current (A)
Temperature Rise (°C)
Inductance (μH)
16
100
0.8
0
Inductance (μH)
12
7.2
0.8
0
0
16
13.2
3.6
0.4
0
0
20
SRP1040-3R3M
8.0
DC Current (A)
8.0
8.8
DC Current (A)
3.2
Inductance (μH)
80
Inductance (μH)
6
4.4
4.0
100
2.4
0
0
DC Current (A)
Inductance (μH)
4
20
10
0
22
0
Inductance (μH)
2
4.0
Inductance (μH)
27
4
SRP1040-470M
100
90
Inductance (μH)
0
L vs. I Charts DC Current (A)
0
24
SRP1040
Series
- Shielded
Inductors
3312 - 2 mm
SMD
TrimmingPower
Potentiometer
Inductance (μH)
0.4
0
Inductance (μH)
70
60
Temperature Rise (°C)
2.8
2.4
21
SRP1040-1R7M
3
Temperature Rise (°C)
Inductance (μH)
100
90
80
18
20
DC Current (A)
DC Current (A)
4.0
3.6
3.2
15
0.6
Temperature Rise (°C)
24
40
Temperature Rise (°C)
20
Temperature Rise (°C)
16
Temperature Rise (°C)
12
Temperature Rise (°C)
8
4
20
10
0
30
Temperature Rise (°C)
0
0.4
0.2
0
1.2
Temperature Rise (°C)
20
10
0
32
60
Temperature Rise (°C)
0.2
0.1
0
1.8
80
70
42
60
28
50
40
30
14
20
0
10
0
3.0
0
0.6
1.2
1.8
2.4
Temperature Rise (°C)
30
50
40
30
Inductance (μH
0.3
1.0
0.8
0.6
Inductance (μH)
0.4
50
40
70
60
Temperature Rise
0.5
1.4
1.2
Temperature Rise (°C)
60
Inductance (μ
70
0.6
Temperature Rise (°
Inductance (μH)
0.7
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.
SRP1040 Series - Shielded Power Inductors
Packaging Specifications
2.0 ± 0.5
(.079 ± .020)
330.0
(13.00)
DIA.
THICKNESS
0.10
(.004)
MAX.
13.5 ± 0.5
(0.53 ± .020)
DIA.
21.0 ± 0.8
(.827 ± .031)
EMBOSSED
CAVITY
75.0 ± 2.0
(2.96 ± 0.08)
13.0 ± 0.5
DIA.
(.512 ± .020)
EMBOSSED
CARRIER
26.0 - 0.00
(1.02 - 0.00)
0.35 ± 0.05
(0.014 ± 0.020)
2.0 ± 0.1
(0.079 ± 0.004)
4.0 ± 0.1
(0.157 ± 0.004)
1.5 ± 0.1
(0.059 ± 0.004)
DIA.
11.8 ± 0.1
(0.465 ± 0.004)
4.5 ± 0.1
(0.177 ± 0.004)
2.2 ± 0.3
(.087 ± 0.012)
0.15
DIA.
(0.0006)
1.75 ± 0.1
(.069 ± 0.004)
24.0 ± 0.3
(0.95 ± 0.012)
16.0 ± 0.1
(0.629 ± 0.004)
10.5 ± 0.1
(0.413 ± 0.004)
DIMENSIONS:
MM
(INCHES)
REV. 06/19
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 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
differences between laboratory and real world conditions.
Unless Bourns has explicitly designated an individual Bourns® product as meeting the requirements of a particular industry
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Bourns® products are not recommended, authorized or intended for use in nuclear, lifesaving, life-critical or life-sustaining applications, nor in any other applications where failure or malfunction may result in personal injury, death, or severe property or
environmental damage. Unless expressly and specifically approved in writing by two authorized Bourns representatives on a
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Bourns expressly identifies those Bourns® standard products that are suitable for use in automotive applications on such
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the user for which such Bourns® custom products are specially designed. Absent a written agreement between Bourns and the
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Bourns® products or technology in any facility which engages in activities relating to such devices. The foregoing restrictions
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to receive U.S. commodities, software, and technical data.
To the maximum extent permitted by applicable law, Bourns disclaims (i) any and all liability for special, punitive, consequential,
incidental or indirect damages or lost revenues or lost profits, and (ii) any and all implied warranties, including implied warranties
of fitness for particular purpose, non-infringement and merchantability.
For your convenience, copies of this Legal Disclaimer Notice with German, Spanish, Japanese, Traditional Chinese and Simplified Chinese
bilingual versions are available at:
Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf
C1753 05/17/18R
