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*R *RoHS oH C S OM CO P M LIA PL N IA T NT
Features
Shielded construction Unit height of 5.9 mm Inductance range: 0.36 H to 10 H Current 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
SRP1250 Series - Shielded Power Inductors
Electrical Specifications
Inductance L (H) I rms (A) I sat (A) DCR (m) max.
Bourns Part No.
SRP1250-R36M SRP1250-R47M SRP1250-R50M SRP1250-R56M SRP1250-R68M SRP1040-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
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
41 38 36 36 34 31 29 27 23 21 20 17 15 12 9.5 11 10 10 9
75 65 55 55 54 53 50 49 48 40 32 32 32 27 14 21 18 18 16
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
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...............................................Ferrite Wire .............................Enameled copper Terminal .........................................Cu/Sn Rated Current.......Ind. drops 20 % at I sat Temperature Rise..........40 C at rated I rms Packaging .......500 pcs. per 13-inch reel Product Dimensions
13.9 MAX. (0.547) 12.7 0.3 (0.500 0.012) 5.9 MAX. (.232) 5.2 (.205) MAX.
13.5 (0.531) 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 190C 60 seconds maximum Ramp Down 5 C/second
3.0 0.5 (0.118 0.020)
1R5
12.7 0.3 (0.500 0.012)
Temperature (C)
2.5 0.5 (0.098 0.020)
Recommended Layout
15.0 (0.591)
Time (Seconds)
4.5 (.177)
Electrical Schematic
7.0 (.276)
DIMENSIONS:
MM (INCHES)
*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.
SRP1250 Series - Shielded Power Inductors
L vs. I Charts
0.60 0.54 0.48 0.42 0.36 0.30 0.24 0.18 0.12 0.06 0 0 5 10 15
SRP1250-R36M
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
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
Temperature Rise (C)
Temperature Rise (C)
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
DC Current (A)
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
DC Current (A)
110 99 88 77 66 55 44 33 22 11 0 60
SRP1250-R56M
SRP1250-R68M
Temperature Rise (C)
Temperature Rise (C)
0.96 0.72 0.48 0.24 0 0 10.6 21.2 31.8 42.4
80 60 40 20 0 53
15
20
25
30
35
40
45
50
20
25
30
35
40 45
50 55
DC Current (A)
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
DC Current (A)
110 99 88 77 66 55 44 33 22 11 0 60
DC Current (A)
160 0.30 0.27 0.24 0.21 0.18 0.15 0.12 0.09 0.06 0.03 0 0 5 10
SRP1250-1R0M
Temperature Rise (C)
Temperature Rise (C)
1.2 0.8 0.4 0 0 10 20 30 40
120 80 40 0 50
15
20
25
35
40
45
50
15
20
25
30
35
DC Current (A)
2.4
DC Current (A)
160 0.24
DC Current (A)
108 96 84 72 60 48 36 24 12 0 40 4.0
SRP1250-1R8M
SRP1250-2R2M
Temperature Rise (C) Inductance (H)
SRP1250-2R7M
140 120 100
Temperature Rise (C)
Inductance (H)
Inductance (H)
2.0 120 1.5 1.2 0.8 40 0.4 0 0 8 16 24 32 0 40 80
0.21 0.18 0.15 0.11 0.09 0.06 0.03 0 0 5 10 15 20 25 30 35
3.2 2.4 1.6 0.8 0 0 8 16 24
80 60 40 20 0 32
DC Current (A)
0.40 0.36 0.32 0.28 0.24 0.20 0.16 0.12 0.8 0.4 0 0 5
DC Current (A)
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 0 4
DC Current (A)
10
SRP1250-3R3M
Temperature Rise (C) Inductance (H)
SRP1250-4R7M
Temperature Rise (C) Inductance (H)
108 96 84 72 60 48 36 24 12 0 28
SRP1250-6R0M
100 80 60 40 20 0 14
8 6 4 2 0 0 2.8 5.6 8.4 11.2
10
15
20
25
30
8
12
15
20
24
DC Current (A)
DC Current (A)
DC Current (A)
Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
Temperature Rise (C)
Inductance (H)
Temperature Rise (C)
Temperature Rise (C)
1.6
SRP1250-1R2M
SRP1250-1R5M
120 108 96 84 72 60 48 36 24 12 0 40
Inductance (H)
Inductance (H)
Inductance (H)
Temperature Rise (C)
1.2
SRP1250-R82M
100
Inductance (H)
Inductance (H)
Inductance (H)
Temperature Rise (C)
Inductance (H)
Inductance (H)
Inductance (H)
SRP1250 Series - Shielded Power Inductors
L vs. I Charts
Temperature Rise (C)
8.0 7.0
()
96 84 72 60 48 36 24 12 0 21 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 2 4
SRP1250-6R8M
Temperature Rise (C) Inductance (H)
SRP1250-7R8M
96 84 72 60 48 36 24 12 0 18
16
SRP1250-9R0M
120 100
6.0 5.0 4.0 3.0 2.0 1.0 0 0 3 6 9 12 15 18
12 80 8 4 20 0 0 3 6 9 12 15 0 18 60 40
6
8
10
12
14
16
DC Current (A)
DC Current (A)
DC Current (A)
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
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. 75.0 2.0 (2.96 0.08) 13.5 0.5 DIA. (.53 .020) EMBOSSED CARRIER EMBOSSED CAVITY
Temperature Rise (C)
Inductance (H)
100 90 80 70 60 50 40
13.5 0.5 (0.53 .020) DIA.
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. 12/07 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
Temperature Rise (C)
Inductance (H)
Inductance (H)

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