M
PL
IA
N
Features
■
Shielded construction
■
Unit height of 5.9 mm
■
Inductance range: 0.22 to 10
μH
■
Current up to 45 A
■
RoHS compliant*
Applications
■
Input/output of DC/DC converters
■
Power supplies for:
*R
oH
S
CO
T
• Portable communications equipment
• Camcorders
• LCD TVs
• Car audio systems
SRP1250 Series - Shielded Power Inductors
Electrical Specifications
Bourns Part No.
SRP1250-R22M
SRP1250-R36M
SRP1250-R47M
SRP1250-R50M
SRP1250-R56M
SRP1250-R68M
SRP1250-R82M
SRP1250-1R0M
SRP1250-1R2M
SRP1250-1R5M
SRP1250-1R8M
SRP1250-2R2M
SRP1250-2R7M
SRP1250-3R3M
SRP1250-4R7M
SRP1250-6R0M
SRP1250-6R8M
SRP1250-7R8M
SRP1250-9R0M
SRP1250-100M
Inductance
L (μH) ±20 %
0.22
0.36
0.47
0.50
0.56
0.68
0.82
1.00
1.20
1.50
1.80
2.20
2.70
3.30
4.70
6.00
6.80
7.80
9.00
10.0
I rms
(A)
45
41
38
36
36
34
31
29
27
23
21
20
17
15
12
9.5
11
10
10
9
I sat
(A)
80
75
65
55
55
54
53
50
49
48
40
32
32
32
27
14
21
18
18
16
DCR
(mΩ) Max.
1.0
1.1
1.3
1.5
1.5
1.7
2.3
2.5
3.3
4.1
4.7
5.5
7.3
9.2
15.0
10.0
18.5
20.5
22.5
25.5
13.5
(0.531)
MAX.
General Specifications
Test Voltage ..................................0.25 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.
Materials
Core ..................................................Iron
Wire ............................Enameled copper
Terminal ........................................ Cu/Sn
Rated Current .....Ind. drops 20 % at Isat
Temperature Rise .....40 °C at rated Irms
Packaging ....... 500 pcs. per 13-inch reel
Product Dimensions
13.9
MAX.
(0.547)
12.7 ± 0.3
(0.500 ± 0.012)
5.2
(.205)
MAX.
5.0
(.197)
MAX.
Soldering Profile
275
225
175
150 °C
125
75
25
0
50
100
150
200
250
300
120-150 seconds
10 seconds minimum
Ramp Up
4 °C/second maximum
<1> Maximum of 10 seconds
between +255 °C and +260 °C
260 °C peak
<1> 255 °C
220 °C
190°C
60 seconds
maximum
Ramp Down
5 °C/second
1R5
12.7 ± 0.3
(0.500 ± 0.012)
Temperature (°C)
3.0 ± 0.5
(0.118 ± 0.020)
2.5 ± 0.5
(0.098 ± 0.020)
Time (Seconds)
Recommended Layout
Electrical Schematic
15.0
(0.591)
4.5
(.177)
7.0
(.276)
DIMENSIONS:
*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.
MM
(INCHES)
SRP1250 Series - Shielded Power Inductors
L vs. I Charts
0.4
SRP1250-R22M
Temperature Rise (°C)
Temperature Rise (°C)
0.32
0.24
0.16
0.08
0
0
12
24
36
48
60
80
60
40
20
0
0
5
10 15
20 25
30
35
40 45
50 55
0
5
10
DC Current (A)
DC Current (A)
DC Current (A)
0.60
0.54
0.48
0.42
0.36
0.30
0.24
0.18
0.12
0.06
0
0
5
10
SRP1250-R50M
15
20
25
30
40
45
50
55
110
99
88
77
66
55
44
33
22
11
0
60
0.60
0.54
0.48
0.42
0.36
0.30
0.24
0.18
0.12
0.06
0
0
5
10
SRP1250-R56M
15
20
25
30
35
40
45
50
110
99
88
77
66
55
44
33
22
11
0
55
0.80
0.72
0.64
0.56
0.48
0.40
0.32
0.24
0.16
0.08
0
0
5
10 15
SRP1250-R68M
20
25
30
35
40 45
50 55
110
99
88
77
66
55
44
33
22
11
0
60
Temperature Rise (°C)
Temperature Rise (°C)
DC Current (A)
DC Current (A)
DC Current (A)
Temperature Rise (°C)
Temperature Rise (°C)
1.2
SRP1250-R82M
100
80
60
40
20
0
53
Inductance (µH)
0.96
0.72
0.48
0.24
0
0
10.6
21.2
31.8
42.4
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
5
10
SRP1250-1R0M
15
20
25
35
40
45
50
110
99
88
77
66
55
44
33
22
11
0
60
1.6
1.2
0.8
0.4
0
0
10
SRP1250-1R2M
160
120
80
40
0
50
Inductance (µH)
20
30
40
DC Current (A)
DC Current (A)
DC Current (A)
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
0
5
10
SRP1250-1R5M
15
20
25
30
35
120
108
96
84
72
60
48
36
24
12
0
40
Temperature Rise (°C)
2.4
SRP1250-1R8M
160
2.4
SRP1250-2R2M
108
96
84
72
60
48
36
24
12
0
40
Temperature Rise (°C)
Inductance (µH)
Inductance (µH)
120
1.5
1.2
0.8
40
0.4
0
0
8
16
24
32
0
40
80
Inductance (µH)
2.0
2.1
1.8
1.5
1.1
0.9
0.6
0.3
0
0
5
10
15
20
25
30
35
DC Current (A)
DC Current (A)
DC Current (A)
4.0
SRP1250-2R7M
140
Inductance (µH)
100
2.4
1.6
0.8
0
0
8
16
24
80
60
40
20
0
32
Inductance (µH)
3.2
Inductance (µH)
120
0.40
0.36
0.32
0.28
0.24
0.20
0.16
0.12
0.8
0.4
0
0
5
SRP1250-3R3M
108
96
84
72
60
48
36
24
12
0
10
15
20
25
30
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
4
SRP1250-4R7M
Temperature Rise (°C)
108
96
84
72
60
48
36
24
12
0
28
Temperature Rise (°C)
Temperature Rise (°C)
DC Current (A)
8
12
15
20
24
DC Current (A)
DC Current (A)
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.
Temperature Rise (°C)
Temperature Rise (°C)
Inductance (µH)
Temperature Rise (°C)
Inductance (µH)
Inductance (µH)
Inductance (µH)
Temperature Rise (°C)
100
0.60
0.54
0.48
0.42
0.36
0.30
0.24
0.18
0.12
0.06
0
SRP1250-R36M
110
99
88
77
66
55
44
33
22
11
0
60
0.60
0.54
0.48
0.42
0.36
0.30
0.24
0.18
0.12
0.06
0
110
99
88
77
66
55
44
33
22
11
0
15 20 25 30 35 40 45 50 55 60 65
SRP1250-R47M
Inductance (µH)
Inductance (µH)
Inductance (µH)
3312 - 2 mm SMD Shielded Power Inductors
SRP1250 Series - Trimming Potentiometer
L vs. I Charts
10
SRP1250-6R0M
Temperature Rise (°C)
Inductance (µH)
Inductance (µH)
8
6
4
2
0
0
2.8
5.6
8.4
11.2
80
60
40
20
0
14
84
72
60
48
36
24
12
0
21
6.0
5.0
4.0
3.0
2.0
1.0
0
0
3
6
9
12
15
18
Inductance (µH)
7.0
Temperature Rise (°C)
84
72
60
48
36
24
12
0
18
0
2
4
6
8
10
12
14
16
DC Current (A)
DC Current (A)
DC Current (A)
16
SRP1250-9R0M
120
Inductance (µH)
12
80
8
4
20
0
0
3
6
9
12
15
0
18
60
40
Inductance (µH)
100
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
0
2
4
SRP1250-100M
Temperature Rise (°C)
DC Current (A)
6
8
10
12
14
30
20
10
0
16
DC Current (A)
Packaging Specifications
330.0
(13.00)
DIA.
2.0
±
0.5
(.079
±
.020)
THICKNESS
0.10
(.004)
MAX.
13.5
±
0.5
(0.53
±
.020)
DIA.
75.0 ± 2.0
(2.96 ± 0.08)
13.5
±
0.5
DIA.
(.53
±
.020)
Temperature Rise (°C)
100
90
80
70
60
50
40
EMBOSSED
CAVITY
EMBOSSED
CARRIER
24.0 ± 0.5
(0.95 ± 0.020)
0.35 ± 0.05
(0.014 ± 0.020)
13.9 ± 0.1
(0.547 ± 0.004)
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.
1.75 ± 0.1
(.069 ± 0.004)
2.7 ± 0.3
(.106 ± 0.012)
24.0 ± 0.3
(0.95 ± 0.012)
5.6 ± 0.1
(0.220 ± 0.004)
0.15
DIA.
(0.0006)
13.5 ± 0.1
(0.520 ± 0.004)
16.0 ± 0.1
(0.629 ± 0.004)
DIMENSIONS:
MM
(INCHES)
REV. 10/13
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.
Temperature Rise (°C)
100
8.0
SRP1250-6R8M
96
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
SRP1250-7R8M
96
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