*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
*RoHS COMPLIANT
SRP1270 Series - Shielded Power Inductors
Features
■Shielded construction
■Mounting height of 7.0 mm max.
■Current rating up to 41 A
■RoHS compliant*
Applications
■Input/output of DC/DC converters
■Power supplies for:
•Portable communications equipment
•Camcorders
•LCD TVs
•Car audio systems
Electrical Specifications
Product Dimensions
15.0
(0.591)
4.5
(.177)
7.0
(.276)
1R2
12.9
(0.508)
12.9
(0.508)
13.7
(0.539) MAX.
MAX.
MAX.
2.5 ± 0.5
(0.098 ± 0.020)
3.0 ± 0.5
(0.118 ± 0.020)
13.7
(0.539)
MAX.
MAX.
6.5
(.256)
MAX.
7.0
(.276)
General Specifications
Test Voltage.....................................1.0 V
Test Frequency ..........................100 KHz
Reflow Soldering.....230 ˚C; 50 sec max.
Operating Temperature ..-55 °C to +125 °C
(Temperature rise included)
Storage Temperature..-55 °C to +125 °C
Resistance to Soldering Heat
..............................+260 °C for 10 sec.
Materials
Core...................................................Iron
Wire .............................Enameled copper
Adhesive ...............................Epoxy resin
Terminal.....................................Ag/Ni/Sn
Rated Current.......Ind. drops 20 % at I sat
Temperature Rise..........40 ˚C at rated I rms
Packaging .......400 pcs. per 13-inch reel
Recommended Layout
Electrical Schematic
Inductance I rms I sat DCR SRF
Bourns Part No. L (µH) ±20 % (A) (A) (mΩ) max. (MHz) typ.
SRP1270-R32M 0.32 46 65 0.9 95
SRP1270-R47M 0.47 41 65 1.2 85
SRP1270-R68M 0.68 35 60 1.6 65
SRP1270-1R0M 1.0 32 50 2.1 45
SRP1270-1R5M 1.5 27 48 2.6 31
SRP1270-1R8M 1.8 24 41 3.2 31
SRP1270-2R2M 2.2 22 40 4.2 25
SRP1270-3R3M 3.3 18 35 6.6 20
SRP1270-4R7M 4.7 15 30 11.2 15
SRP1270-5R6M 5.6 14 26.5 10.0 13
SRP1270-6R8M 6.8 12 21 14.0 12
SRP1270-8R2M 8.2 11 17 15.5 11
SRP1270-100M 10.0 10 16 16.8 10
*RoHS COMPLIANT
Soldering Profile
25
75
125
175
225
275
0 50 100 150 200 250 300
Time (Seconds)
Temperature (°C)
120-150 seconds
60 seconds
maximum
260 °C peak
190°C
150 °C
220 °C
Ramp Down
5 °C/second
<1> 255 °C
<1>Maximum of 10 seconds
between +255 °C and +260 °C
Ramp Up
4 °C/second maximum
10 seconds minimum
DIMENSIONS: MM
(INCHES)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
SRP1270 Series - Shielded Power Inductors
L vs. I Charts
0
010203040 60
0.2
0.4
0.6
0.8
1.0
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-R68M
Temperature Rise (°C)
50
0
0132639 65
0.1
0.2
0.3
0.5
0.6
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-R47M
Temperature Rise (°C)
0.4
52
0
01020304050
0.2
0.4
0.6
0.8
1.0
1.2
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-1R0M
Temperature Rise (°C)
0
0 8 16 24 32 48
0.5
1.0
1.5
2.0
2.5
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-1R5M
Temperature Rise (°C)
40
0
010203040
0.5
1.0
1.5
2.0
2.5
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-2R2M
Temperature Rise (°C)
0
0 7 14 21 35
0.8
1.6
2.4
3.2
4.0
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-3R3M
Temperature Rise (°C)
28
0
0 6 12 18 30
1.0
2.0
3.0
4.0
5.0
6.0
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-4R7M
Temperature Rise (°C)
24
0
0 4.2 8.4 12.6 21
3.0
6.0
9.0
12.0
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-6R8M
Temperature Rise (°C)
16.8
0
048 16
3.0
6.0
9.0
12.0
15.0
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-100M
Temperature Rise (°C)
12
0
0 3.2 6.4 16
2.8
5.6
8.4
11.2
14.0
0
20
40
60
80
100
Inductance (μH)
DC Current (A)
SRP1270-8R2M
Temperature Rise (°C)
9.6 12.8
0
0 5.3 10.6 15.9 26.5
1.8
3.6
5.4
7.2
9.0
0
20
40
60
80
100
Inductance (μH)
DC Current (A)
SRP1270-5R6M
Temperature Rise (°C)
21.2
0
01326395265
0.1
0.2
0.3
0.4
0.5
0
20
40
60
80
100
Inductance (μH)
DC Current (A)
SRP1270-R32M
Temperature Rise (°C)
0
0 8.2 16.4 24.6 32.8
0.5
1.0
1.5
2.0
2.5
0
10
20
30
40
50
60
70
80
90
100
Inductance (μH)
DC Current (A)
SRP1270-1R8M
Temperature Rise (°C)
41
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
REV. 08/09
SRP1270 Series - Shielded Power Inductors
Packaging Specifications
24.0 ± 0.5
(0.95 ± 0.020)
2.0 ± 0.5
(.079 ± .020)
100.0 ± 2.0
(3.94 ± .079)
330.0
(13.00)
DIA.
13.5 ± 0.5
(.53 ± .020) DIA.
13.5 ± 0.5
(0.53 ± .020)
DIA.
EMBOSSED
CARRIER
EMBOSSED
CAVITY
0.10
(.004)
THICKNESS
MAX.
DIMENSIONS: MM
(INCHES)
1.5 ± 0.1
(0.059 ± 0.004)
0.15
(0.0006)
2.0 ± 0.1
(0.079 ± 0.004)
4.0 ± 0.1
(0.157 ± 0.004) DIA.
DIA.
0.50 ± 0.05
(0.020 ± 0.002)
6.9 ± 0.1
(0.272 ± 0.004)
14.2 ± 0.1
(0.559 ± 0.004)
20.5 ± 0.1
(0.807 ± 0.004)
13.2 ± 0.1
(0.520 ± 0.004)
24.0 ± 0.3
(0.95 ± 0.012)
1.75 ± 0.1
(.069 ± 0.004)
2.7 ± 0.3
(.106 ± 0.012)
