PL
IA
NT
Features
7.6
MAX.
(.299)
Applications
n
SEPIC topology
n
Power supplies for:
C
OM
n
Multiple applications: parallel, series,
471
LE
AD
F
RE
E
dual-inductor and transformer
n
Magnetically shielded, low radiation
n
Inductance range: 0.33 to 4000 μH
7.6
(.299)
n
Rated current up to 6.19 A
MAX.
n
RoHS compliant*
*R
oH
S
- Communication equipment
- Notebooks, desktop computers,
servers
- LCDs, flat panels, backlights
- Camcorders, HDTVs
SRF0703 Series - Dual-Winding Shielded Power Inductors
3.4 ± 0.2
(.134 ± .008)
Electrical Specifications @ 25 °C
Parallel Rating
Bourns Part No.
Inductance
@ 100 KHz
L (μH) ±20 %
Ro VE LEA
HS RS D
C ION FRE
OM S E
PL AR
IA E
NT
*
General Specifications
3
2.9
TYP.
(.114)
4
DCR
(W)
Max.
Series Rating
Inductance
@ 100 KHz
L (μH) ±20 %
DCR
(W)
Max.
Irms
(A)
Isat
(A)
Irms
(A)
Isat
(A)
SRF0703-R33M
0.33
0.0092 6.19 14.4
1.32
2.7
(.106)
SRF0703-1R0M
1.0
0.0135 5.25 7.97
4
TYP.
SRF0703-1R5M
1.5
0.0191 4.64 6.52
6
SRF0703-2R2M
2.2
0.0217 4.11 5.52
8.8
SRF0703-3R3M
3.3
0.0316 3.31 4.22
13.2
1
2
SRF0703-4R7M
4.7
0.0406 3.09
1.0
3.78
18.8
TYP.
(.039)
SRF0703-6R8M
6.8
0.0658 2.55 3.12
27.2
SRF0703-8R2M
8.2
0.0772 2.19 2.66
32.8
7.6
MAX.
SRF0703-100M
10
0.0826 2.08 2.47
40
(.299)
SRF0703-150M
15
0.119
1.83 2.05
60
0.4
0.4
3.0
1.62
SRF0703-220M
22
0.15
1.67
88
(.016)
(.016)
(.118)
SRF0703-330M
33
0.24
1.31 1.35
132
7.6
SRF0703-470M
1
47
0.338
1.08 1.14
2
1
(.299)
188
2
SRF0703-680M
68
0.507
0.89 0.96
MAX.
272
SRF0703-820M
82
0.61
7.9
0.86 0.89
328
(.311)
SRF0703-101M
100
0.715
0.73 0.79
400
SRF0703-151M
4
150
0.986
0.58 0.65
600
3
4
3
SRF0703-221M
220
1.48
0.52
1.4
0.53
880
1.4
SRF0703-331M
330
2.16
0.42 0.44
1320
(.055)
(.055)
INDUCTOR MODE
SERIES
SRF0703-471M
DUAL
470
2.82
0.35 0.37
3.4 ± 0.2
MODE
1880
(.134 ± .008)
SRF0703-681M
680
3.96
0.29 0.31
2720
SRF0703-821M
820
5.01
0.27 0.28
3280
SRF0703-102M
1000
6.11
0.26 0.25
4000
Electrical Schematic
1
2
2.7
(.106)
TYP.
4
1
3
2.9
TYP.
(.114)
0.04
0.072
0.11
0.132
0.182
0.242
0.285
0.306
0.342
0.47
3.0
0.62
(.118)
1.0
1.28
1.92
7.9
2.28
(.311)
2.64
3.63
5.5
8.25
11.22
16.17
20.07
24.42
3.1
2.63
2.32
2.06
1.66
1.55
1.28
1.1
1.04
0.916
0.811
0.653
0.542
0.444
0.43
0.367
0.289
0.26
0.211
0.173
0.143
0.134
0.128
7.18
3.99
3.26
2.76
2.11
1.89
1.56
1.33
1.24
1.03
0.83
0.68
0.57
0.48
0.44
0.39
0.32
0.27
0.22
0.18
0.15
0.14
0.13
Test Voltage ..................................0.25 V
Hi-pot ................500 Vrms, 3 mA, 3 sec.
Reflow Soldering .. 230 °C; 50 sec. max.
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Resistance to Solder Heat
...............................+260 °C for 10 sec.
Moisture Sensitivity Level ...................... 1
ESD Classification (HBM) .................. N/A
Materials
Core ..............................................Ferrite
Wire ........................... Enameled copper
Base ................................................ LCP
Adhesive .............................. Epoxy resin
Terminal ................................... Cu/Ni/Sn
Rated Current
........... Inductance drops 30 % at Isat
Temperature Rise .... 40 °C at rated Irms
Packaging.....1500 pcs. per 13-inch reel
How to Order
SRF0703 - 100M
Model
Value Code (see table)
Product Dimensions
7.6
MAX.
(.299)
2
1
2
7.6
(.299)
MAX.
N1
N2
N1
N2
N1
N2
3
4
3
1
2
1.0
4
TYP.
(.039)
3
4
PARALLEL
SERIES
3.4 ± 0.2
(.134 ± .008)
Recommended Layout
0.4
(.016)
3.0
(.118)
0.4
(.016)
3.0
(.118)
1
2
7.9
(.311)
1
2
7.9
(.311)
2.7
(.106)
TYP.
4
3
2.9
TYP.
(.114)
4
1.4
(.055)
3
1.4
(.055)
4
3
SERIES MODE
DUAL INDUCTOR MODE
1
2
*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.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device
performance may vary over time.
Users should verify actual device performance in their specific applications.
0.4
1.0
TYP.
(.039)
MM
DIMENSIONS:
(INCHES)
3.0
0.4
3.0
SRF0504 Series - Line Filter
SRF0703 Series - Dual-Winding Shielded Power Inductors
Packaging Specifications
330
DIA.
(12.99)
2.0 ± 0.5
(.079 ± .020)
22.4
(.882)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0 -0
(1.97 -0)
13.0 ± 0.5
DIA.
(.512 ± .020)
18 +0
(.709 +0)
21.0 ± 0.8
(.827 ± .031)
16.0
(.630)
END
16.0
(.630)
4.0
(.157)
START
NO COMPONENT
200
(7.87)
COMPONENTS
NO COMPONENT
400
(15.75)
USER DIRECTION OF FEED
QTY: 1500 PCS. PER REEL
MM
DIMENSIONS:
(INCHES)
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 520 390 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
REV. 05/18
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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