SRP1280

PL
IA
NT
Features
The SRP1280 Series is obsolete
and not recommended for new
designs.
CO
M
■ Shielded construction
*R
oH
S
■ Unit height of 8.0 mm
■ Inductance range: 0.15 µH to 0.44 µH
■ Current up to 50 A
■ RoHS compliant*
SRP1280 Series - Shielded Power Inductors
Electrical Specifications
Bourns Part No.
SRP1280-R15Y
SRP1280-R21M
SRP1280-R26M
SRP1280-R32M
SRP1280-R44M
Inductance
L (µH)
0.15
0.21
0.26
0.32
0.44
±
±
±
±
±
30
20
20
20
20
%
%
%
%
%
Test Frequency
(Hz)
0.1
0.1
0.1
0.1
0.1
V
V
V
V
V
/
/
/
/
/
500K
500K
500K
500K
500K
I rms
(A) max.
I sat
(A) max.
DCR
(mΩ) max.
50
45
40
40
28
55
50
45
41
30
0.60
0.60
0.60
0.60
0.60
Materials
Core...............................................Ferrite
Wire .............................Enameled copper
Terminal .........................................Cu/Sn
Rated Current.......Ind. drops 20 % at I sat
Temperature Rise..........40 ˚C at rated I rms
Packaging .......400 pcs. per 13-inch reel
Soldering Profile
Temperature (°C)
275
E
T
E
L
O
S
B
O
<1> Maximum of 10 seconds
between +255 °C and +260 °C
225
260 °C peak
<1> 255 °C
220 °C
190°C
175
150 °C
General Specifications
Test Voltage.....................................0.1 V
Test Frequency ..........................500 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.
60 seconds
maximum
Ramp Down
5 °C/second
Product Dimensions
5.0 ± 0.5
(0.197 ± 0.020)
13.46
MAX.
(0.530)
125
120-150 seconds
10 seconds minimum
75
12.95
(.510)
MAX.
Ramp Up
4 °C/second maximum
25
0
50
100
150
200
250
R26
300
2.54 ± 0.5
(0.100 ± 0.020)
Time (Seconds)
Electrical Schematic
8.0
(0.315)
MAX.
Recommended Layout
13.6
(0.535)
7.6
(0.299)
7.1
(0.280)
DIMENSIONS:
*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.
MM
(INCHES)
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communications equipment
• Camcorders
• LCD TVs
• Car audio systems
SRP1280 Series - Shielded Power Inductors
L vs. I Charts
0.5
50
0.4
40
0.3
30
0.2
20
0.1
10
0
5
10
15
20
25
30
35
40
45
50
0.5
50
0.5
50
0.4
40
0.4
40
0.3
30
0.3
30
0.2
20
0.2
20
0.1
10
0.1
10
0
0
5
10
0.2
20
0.1
10
0
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
0
50
DC Current (A)
40
0
45
0.56
32
0.42
24
0.28
16
0.14
8
0
0
7
14
21
0
35
28
DC Current (A)
DC Current (A)
Packaging Specifications
330.0
(13.00)
DIA.
40
Inductance (µH)
30
0.3
Temperature Rise (°C)
Inductance (µH)
40
20
35
0
E
T
E
L
O
S
B
O
50
15
30
SRP1280-R44M
0.7
0.4
10
25
60
60
0.5
5
20
0
50
DC Current (A)
SRP1280-R32M
0
15
Inductance (µH)
Inductance (µH)
0.6
DC Current (A)
0.6
SRP1280-R26M
60
Temperature Rise (°C)
0
0
55
SRP1280-R21M
Temperature Rise (°C)
0.6
Temperature Rise (°C)
Inductance (µH)
60
Temperature Rise (°C)
SRP1280-R15M
0.6
2.0 ± 0.5
(.079 ± .020)
DIMENSIONS:
MM
(INCHES)
THICKNESS
0.10
(.004)
MAX.
13.5 ± 0.5
(0.53 ± .020)
DIA.
EMBOSSED
CAVITY
75.0 ± 2.0
(2.96 ± 0.08)
13.5 ± 0.5
DIA.
(.53 ± .020)
EMBOSSED
CARRIER
24.0 ± 0.5
(0.95 ± 0.020)
0.35 ± 0.05
(0.014 ± 0.020)
4.0 ± 0.1
(0.157 ± 0.004)
2.0 ± 0.1
(0.079 ± 0.004)
1.5 ± 0.1
(0.059 ± 0.004)
DIA.
13.05 ± 0.1
(0.514 ± 0.004)
8.2 ± 0.1
(0.323 ± 0.004)
1.75 ± 0.1
(.069 ± 0.004)
10.5 ± 0.3
(.413 ± 0.012)
0.15
DIA.
(0.0006)
13.05 ± 0.1
(0.514 ± 0.004)
24.0 ± 0.3
(0.95 ± 0.012)
16.0 ± 0.1
(0.629 ± 0.004)
REV. 05/11
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.