Features
n Multiple configurations: parallel, series,
dual-inductor and transformer
n Magnetically shielded, low radiation
n Inductance range: 8.2 to 600 μH
n Heating current up to 2.19 A
n AEC-Q200 compliant
n RoHS compliant* and halogen free**
Applications
n DC/DC converters
n Power supplies
n SEPIC - DC/DC converters
SRF0703A Series - Dual-Winding Shielded Power Inductors
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Solder Heat
.............................+250 °C for 10 sec.
Temperature Rise
.......................40 °C typ. at rated Irms
Inductance Drop ........... 30 % typ. at Isat
Hi-pot (N1-N2) ................500 Vac/60 Hz,
3 mA, 1 sec
Moisture Sensitivity Level ..................... 1
ESD Classication (HBM)................. N/A
Electrical Specications @ 25 °C General Specications
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................. 1500 pcs. per reel
Materials
Product Dimensions
DIMENSIONS: MM
(INCHES)
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** 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.
470
Bourns Part No.
Parallel Rating Series Rating
Inductance
@ 100 kHz /
0.25 V
L (μH) ±20 %
DCR
(W)
Max.
Irms
(A)
Isat
(A)
Inductance
@ 100 kHz /
0.25 V
L (μH) ±20 %
DCR
(W)
Max.
Irms
(A)
Isat
(A)
SRF0703A-8R2M 8.2 0.0772 2.19 2.66 34.1 0.306 1.1 1.33
SRF0703A-100M 10 0.0826 2.08 2.47 39.6 0.342 1.04 1.24
SRF0703A-150M 15 0.119 1.83 2.05 59.6 0.47 0.916 1.03
SRF0703A-220M 22 0.15 1.62 1.67 89.5 0.62 0.811 0.83
SRF0703A-330M 33 0.24 1.31 1.35 140.5 1.0 0.653 0.68
SRF0703A-470M 47 0.338 1.08 1.14 194.2 1.28 0.542 0.57
SRF0703A-680M 68 0.507 0.89 0.96 289.3 1.92 0.444 0.48
SRF0703A-820M 82 0.61 0.86 0.89 324.7 2.28 0.43 0.44
SRF0703A-101M 100 0.715 0.73 0.79 397.6 2.64 0.367 0.39
SRF0703A-151M 150 0.986 0.58 0.65 608.2 3.63 0.289 0.32
SRF0703A-221M 220 1.48 0.52 0.53 922.6 5.5 0.26 0.27
SRF0703A-331M 330 2.16 0.42 0.44 1335 8.25 0.211 0.22
34
21
2
1
43
4
DUAL INDUCTOR MODE SERIES MODE
3
12
7.6
(.299) MAX.
8R2
0.4
(.016)
TYP.
1.0
(.039)
TYP.
2.9
(.114)
1.4
(.055)
3.0
(.118)
7.9
(.311)
0.4
(.016)
1.4
(.055)
3.0
(.118)
7.9
(.311)
7.6
(.299)
MAX.
3.4 ± 0.2
(.134 ± .008)
2.7
(.106)
TYP.
N2
2
4
N1
1
3
N2
2
4
N1
1
3
PARALLEL
DOT
INDICATES
TERMINAL 1
N2
2
4
N1
1
3
SERIES
Recommended Layout
Electrical Schematics
34
21
2
1
43
4
DUAL INDUCTOR MODE SERIES MODE
3
12
7.6
(.299) MAX.
8R2
0.4
(.016)
TYP.
1.0
(.039)
TYP.
2.9
(.114)
1.4
(.055)
3.0
(.118)
7.9
(.311)
0.4
(.016)
1.4
(.055)
3.0
(.118)
7.9
(.311)
7.6
(.299)
MAX.
3.4 ± 0.2
(.134 ± .008)
2.7
(.106)
TYP.
N2
2
4
N1
1
3
N2
2
4
N1
1
3
PARALLEL
DOT
INDICATES
TERMINAL 1
N2
2
4
N1
1
3
SERIES
34
21
2
1
43
4
DUAL INDUCTOR MODE SERIES MODE
3
12
7.6
(.299) MAX.
8R2
0.4
(.016)
TYP.
1.0
(.039)
TYP.
2.9
(.114)
1.4
(.055)
3.0
(.118)
7.9
(.311)
0.4
(.016)
1.4
(.055)
3.0
(.118)
7.9
(.311)
7.6
(.299)
MAX.
3.4 ± 0.2
(.134 ± .008)
2.7
(.106)
TYP.
N2
2
4
N1
1
3
N2
2
4
N1
1
3
PARALLEL
DOT
INDICATES
TERMINAL 1
N2
2
4
N1
1
3
SERIES
DIMENSIONS: MM
(INCHES)
*RoHS COMPLIANT
*RoHS COMPLIANT
& AEC APPROVED
*RoHS COMPLIANT, **HALOGEN FREE
& AEC COMPLIANT
*RoHS and
AEC-Q200 COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
SRF0703A Series - Dual-Winding Shielded Power Inductors
Inductance vs. IDC
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.
Temperature Rise vs. IDC
2.4 3.21.60.80.0
2.4 3.21.60.80.0
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
100.0
0.0
2.0
4.0
6.0
8.0
10.0
0.0
10.0
5.0
15.0
20.0
25.0
30.0
1.5 2.01.00.50.0
0.50.0 1.0 2.01.5
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
0.0
100.0
80.0
20.0
40.0
60.0
0.60.30.0
0.30.0 0.90.6 1.2
1.20.9
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0.20.0 0.4 0.80.6
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
0.6 0.80.40.20.0
0.0
150.0
50.0
100.0
200.0
SRF0703A-8R2M SRF0703A-220M SRF0703A-680M
SRF0703A-151M
SRF0703A-8R2M SRF0703A-220M SRF0703A-680M
SRF0703A-151M
How to Order
SRF0703A - 100M
Model
Value Code (see table)
2.4 3.21.60.80.0
2.4 3.21.60.80.0
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
100.0
0.0
2.0
4.0
6.0
8.0
10.0
0.0
10.0
5.0
15.0
20.0
25.0
30.0
1.5 2.01.00.50.0
0.50.0 1.0 2.01.5
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
0.0
100.0
80.0
20.0
40.0
60.0
0.60.30.0
0.30.0 0.90.6 1.2
1.20.9
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0.20.0 0.4 0.80.6
IDC (A)
L (µH)
IDC (A)
ΔT (°C)
L @ 25 °C L @ 125 °C
ΔT @ 25 °C
0.0
20.0
40.0
60.0
80.0
0.6 0.80.40.20.0
0.0
150.0
50.0
100.0
200.0
SRF0703A-8R2M SRF0703A-220M SRF0703A-680M
SRF0703A-151M
SRF0703A-8R2M SRF0703A-220M SRF0703A-680M
SRF0703A-151M
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.
SRF0703A Series - Dual-Winding Shielded Power Inductors
REV. 11/18
Soldering Prole
200
Max. Peak Temperature -5 ഒ30 sec. max.
Max. Time Above 217 ഒ: 60~150 sec. max.
Peak Temperature250 ഒ max.
250
150
200
100
50
0
Temperature (°C)
10050 150
Time (Seconds)
+4.0 °C/Sec. Max. 150~200 °C / 60~120 Sec. +3.0 °C/Sec. Max. -(1.0~5.0) °C/Sec. Max.
Temperature
Rising Area
Preheat
Area
Reflow
Area
Forced
Cooling Area
250
Peak Temperature: 250 °C
217 °C
60~120 Sec.
60 Sec.
Max.
60~150 Sec.
Peak Temperature:
250 ° C max.
Max. Peak Temperature -5 °C:
30 sec. max.
Max. Time Above 217 °C:
90-150 sec. max.
USER DIRECTION OF FEED
200
(7.87)
NO COMPONENT NO COMPONENTCOMPONENTS
400
(15.75)
START
4.0
(.157)
12.0
(.472)
END
8R28R28R28R28R2
DIMENSIONS: MM
(INCHES)
QTY: 1500 PCS. PER REEL
18 +0
(.709 +0)
22.4
(.882)
2.0 ± 0.5
(.079 ± .020)
50.0 -0
(1.97 -0)
330
(12.99)DIA.
13.0 ± 0.5
(.512 ± .020) DIA.
13.0 ± 0.5
(.512 ± .020)
DIA.
21.0 ± 0.8
(.827 ± .031)
16.0
(.630)
Packaging Specications
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its aliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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C1753 05/17/18R