OM
PL
IA
N
Features
n
Shielded construction
n
Unit height of 5.9 mm
n
Inductance range: 0.22 to 10 μH
n
Current up to 45 A
n
RoHS compliant*
*R
oH
S
This series is currently available,
but not recommended for new
designs. The newer
SRP1245A
series is recommended.
C
T
100 5
172
LE
AD
F
RE
E
Electrical Specifications
Bourns Part No.
SRP1250 Series - Shielded Power Inductors
General Specifications
Test Voltage ..................................0.25 V
Test Frequency ......................... 100 KHz
Reflow Soldering .. 230 °C; 50 sec. max.
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature (On Board)
................................-40 °C to +125 °C
Resistance to Soldering Heat
............................. +260 °C for 10 sec.
Moisture Sensitivity Level .....................1
ESD Classification (HBM).................N/A
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)
13.5
(0.531)
MAX.
5.2
(.205)
MAX.
5.0
(.197)
MAX.
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
SRP1250-6R0M
SRP1250-6R8M
SRP1250-9R0M
SRP1250-7R8M
SRP1250-4R7M
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
Ro VE LEA
HS RS D
C ION FRE
OM S E
PL AR
IA E
NT
*
Inductance
L (μH) ±20 %
I rms
(A)
45
41
38
36
36
34
31
29
27
23
21
20
17
15
9.5
10
9
11
12
I sat
(A)
80
75
65
55
55
54
53
50
49
48
40
32
32
32
14
21
18
16
18
27
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
15.0
10.0
MAX.
5.9
(.232)
5.2
(.205)
MAX.
9.2
6.00
6.80
9.00
7.80
SRP1250-100M
10.0
10
13.9
MAX.
(0.531)
12.7 ± 0.3
(0.500 ± 0.012)
22.5
25.5
20.5
18.5
Soldering Profile
275
225
175
125
75
25
4.5
(.177)
Temperature (°C)
220 °C
0.3
12.7 ±
190°C
(0.500 ± 0.012)
seconds
60
maximum
150 °C
120-150 seconds
2.5 ± 0.5
(0.098 ± 0.020)
2.5
(.099)
Temperature (°C)
<1> Maximum of 10 seconds
between +255 °C and +260 °C
13.5
(0.547)
MAX.
<1> 255 °C
1R5
260 °C peak
275
225
175
125
75
25
100
1725
<1> 5 seconds maximum
at +245 °C
12.7 ± 0.3
(0.500 ± 0.012)
<1> 245 °C
170 °C
Ramp Down
5 °C/second
183 °C
60 seconds
maximum
150 °C
120 -150 seconds
R
5
10 seconds minimum
10 seconds minimum
3.0 ± 0.5
Ramp Up
(0.118 ± 0.020)
4 °C/second maximum
Ramp Up
4 °C/second maximum
3.0 ± 0.5
50
100
(0.118 ± 0.020)
0
1.5
(.060)
150
200
250
300
0
50
100
Time (Seconds)
150
200
2.5 ± 0.5
(0.098 ± 0.020)
Time (Seconds)
250
Electrical Schematic
15.0
(0.591)
4.5
(.177)
Recommended Layout
15.0
(0.591)
4.5
(.177)
7.0
(.276)
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)
Applications
n
Input/output of DC/DC converters
n
Power supplies for:
• Portable communications equipment
• Camcorders
• LCD TVs
• Car audio systems
SRP1250 Series - Shielded Power Inductors
L vs. I Charts
Temperature Rise (°C)
Temperature Rise (°C)
Temperature Rise (°C)
Temperature Rise (°C)
Temperature Rise (°C)
Temperature Rise (°C)
Temperature Rise (°C)
0.4
SRP1250-R22M
100
80
60
40
20
0.32
0.24
0.16
0.08
0
0
12
24
36
48
60
0
0.60
0.54
0.48
0.42
0.36
0.30
0.24
0.18
0.12
0.06
0
SRP1250-R36M
0
5
10 15
20 25
30
35
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
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)
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
SRP1250-R50M
0
5
10
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
SRP1250-R56M
0
5
10
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
SRP1250-R68M
0
5
10 15
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)
Inductance (µH)
0.96
0.72
0.48
0.24
0
0
10.6
21.2
31.8
42.4
80
60
40
20
0
53
Temperature Rise (°C)
1.2
SRP1250-R82M
100
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
SRP1250-1R0M
0
5
10
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
SRP1250-1R2M
160
120
80
40
0
50
Inductance (µH)
Inductance (µH)
DC Current (A)
DC Current (A)
0
10
20
30
40
DC Current (A)
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
SRP1250-1R5M
0
5
10
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
Inductance (µH)
Inductance (µH)
1.5
1.2
0.8
0.4
0
0
8
16
24
32
120
80
40
0
40
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)
108
96
84
72
60
48
36
24
12
0
40
Temperature Rise (°C)
DC Current (A)
4.0
SRP1250-2R7M
140
Inductance (µH)
Inductance (µH)
100
2.4
1.6
0.8
0
0
8
16
24
80
60
40
20
0
32
Inductance (µH)
3.2
Temperature Rise (°C)
120
0.40
0.36
0.32
0.28
0.24
0.20
0.16
0.12
0.8
0.4
0
SRP1250-3R3M
DC Current (A)
0
5
10
15
20
25
30
108
96
84
72
60
48
36
24
12
0
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
SRP1250-4R7M
Temperature Rise (°C)
108
96
84
72
60
48
36
24
12
0
28
DC Current (A)
0
4
8
12
15
20
24
DC Current (A)
10
SRP1250-6R0M
Inductance (µH)
6
4
2
0
0
2.8
5.6
Inductance (µH)
8
10.0
96
9.0
7.0
84
84
80
8.0
6.0
72
72
7.0
60
5.0
6.0
60
60
5.0
Specifications are subject to change without notice.
48
4.0
48
4.0
40
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
36
3.0
36
3.0
24
Users should verify actual device performance in their specific applications.
2.0
24
2.0
20
12
1.0
1.0
12
0
0
0
0
0
0
2
4
6
8
10
12
14
16
18
0
3
6
9
12
15
18
21
8.4
11.2
14
100
8.0
SRP1250-6R8M
Temperature Rise (°C)
Temperature Rise (°C)
96
SRP1250-7R8M
Inductance (µH)
Temperature Rise (°C)
Inductance (µH)
Inductance (µH)
Inductance (µH)
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
SRP1250-1R5M
0
5
10
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
Inductance (µH)
Inductance (µH)
1.5
1.2
0.8
0.4
0
0
8
16
24
32
120
80
40
0
40
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)
108
96
84
72
60
48
36
24
12
0
40
Temperature Rise (°C)
DC Current (A)
4.0
SRP1250-2R7M
140
Inductance (µH)
Inductance (µH)
100
2.4
1.6
0.8
0
80
60
40
20
Inductance (µH)
3.2
Temperature Rise (°C)
120
3312 - 2 mm SMD Trimming Potentiometer
SRP1250 Series - Shielded Power Inductors
0
8
16
24
0
32
0
5
10
15
20
25
30
0.40
0.36
0.32
0.28
0.24
0.20
0.16
0.12
0.8
0.4
0
SRP1250-3R3M
108
96
84
72
60
48
36
24
12
0
L vs. I Charts
DC Current (A)
10
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
SRP1250-4R7M
Temperature Rise (°C)
DC Current (A)
0
4
8
12
15
20
24
60
48
36
24
12
0
28
DC Current (A)
SRP1250-6R0M
Temperature Rise (°C)
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
6.0
5.0
4.0
3.0
2.0
1.0
0
0
3
6
9
12
15
18
Inductance (µH)
7.0
84
72
60
48
36
24
12
0
21
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)
80
60
40
20
0
3
6
9
12
15
0
18
8
4
0
Inductance (µH)
12
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
SRP1250-100M
Temperature Rise (°C)
DC Current (A)
0
2
4
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. 12/17
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
Temperature Rise (°C)
108
96
84
72
Temperature Rise (°C)
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