SRF1280A

& *R
AE oH
C- S C
Q2 O
00 MP
QU LI
A L A NT
IF
IE
D
101
Features
Applications
■ Multiple applications: parallel, series,
■ Automotive systems:
dual-inductor and transformer
Magnetically shielded, low radiation
Inductance range: 0.47 to 4000 μH
Rated current up to 17.9 A
AEC-Q200 qualified
RoHS compliant* and halogen free**
■
■
■
■
■
- Driver assistant - Entertainment
- Information
- Lighting
■ DC/DC converters
■ Power supplies
■ SEPIC - DC/DC converters
SRF1280A Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
General Specifications
Parallel Rating
Inductance
Bourns
@ 100 KHz
L (μH)
Part No.
SRF1280A-R47Y
0.47
SRF1280A-1R0Y
1.0
SRF1280A-1R5Y
1.5
SRF1280A-2R2Y
2.2
SRF1280A-3R3Y
3.3
SRF1280A-4R7Y
4.7
SRF1280A-6R8Y
6.8
SRF1280A-8R2Y
8.2
SRF1280A-100M
10
SRF1280A-150M
15
SRF1280A-220M
22
SRF1280A-330M
33
SRF1280A-470M
47
SRF1280A-680M
68
SRF1280A-820M
82
SRF1280A-101M
100
SRF1280A-151M
150
SRF1280A-221M
220
SRF1280A-331M
330
SRF1280A-471M
470
SRF1280A-681M
680
SRF1280A-821M
820
SRF1280A-102M
1000
Tol.
(%)
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
DCR
(Ω)
Max.
0.0055
0.0067
0.0076
0.0092
0.011
0.0135
0.0183
0.0191
0.0241
0.0333
0.0503
0.0664
0.0898
0.123
0.153
0.175
0.261
0.343
0.54
0.865
1.296
1.632
1.992
Series Rating
Irms
(A)
17.9
15.5
13.5
12.5
10.4
8.25
7.34
6.32
6.04
5.03
4
3.23
2.95
2.44
2.09
1.96
1.59
1.29
1.04
0.85
0.76
0.65
0.61
Isat
(A)
56
40
31.1
25.5
21.5
16.5
13.3
12.2
11.2
9.66
7.57
6.22
5.28
4.44
4.06
3.64
3.01
2.43
2.01
1.68
1.39
1.27
1.14
Inductance
@ 100 KHz
L (μH)
1.88
4
6
8.8
13.2
18.8
27.2
32.8
40
60
88
132
188
272
328
400
600
880
1320
1880
2720
3280
4000
Tol.
(%)
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 30
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
DCR
(Ω)
Max.
0.0216
0.026
0.0306
0.0338
0.04
0.05
0.0656
0.0714
0.0921
0.129
0.192
0.265
0.353
0.469
0.578
0.701
1.013
1.38
2.172
3.3
4.888
5.896
7.202
Irms
(A)
8.94
7.74
6.77
6.23
5.23
4.13
3.67
3.16
3.02
2.51
2
1.61
1.47
1.22
1.04
0.98
0.796
0.645
0.522
0.427
0.38
0.325
0.307
Isat
(A)
28
20
15.6
12.7
10.8
8.24
6.67
6.09
5.6
4.83
3.78
3.11
2.64
2.22
2.03
1.82
1.51
1.22
1.01
0.838
0.697
0.633
0.571
Test Voltage ..................................0.25 V
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Solder Heat
............................. +245 °C for 10 sec.
Temperature Rise
.......................40 °C typ. at rated Irms
Inductance drop ...................30 % at Isat
Materials
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................... 400 pcs. per reel
Product Dimensions
12.50
MAX.
(.492)
12.50
(.492)
MAX.
Electrical Schematic
1
2
N1
1
N2
3
2
N1
4
1
N2
3
2
N1
4
4
3
PARALLEL
8.00
MAX.
(.315)
N2
SERIES
5.00 ± 0.3
(.197 ± .012)
5.00 ± 0.3
(.197 ± .012)
Recommended Layout
4.50
(.204)
2.15
(.085)
2
4
3
4.50
(.204)
2.15
(.085)
2
2
1
1
DIMENSIONS:
1
MM
(INCHES)
1.80 ± 0.2
(.071 ± .008)
13.00
(.512)
13.00
(.512)
DIMENSIONS:
3
4
1.28
(.050)
DUAL INDUCTOR MODE
3
MM
(INCHES)
4
How to Order
1.28
(.050)
SRF1280A - 100M
SERIES MODE
Model
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be
“halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less;
and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
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.
Value Code (see table)
SRF1280A Series - Dual-Winding Shielded Power Inductors
Inductance vs. IDC
SRF1280A-470M
L @ 25 °C
50.0
SRF1280A-681M
L @ 25 °C
L @ 125 °C
SRF1280A-102M
L @ 125 °C
L @ 25 °C
800.0
1200.0
600.0
900.0
L @ 125 °C
20.0
L (µH)
30.0
L (µH)
L (µH)
40.0
400.0
200.0
10.0
0.0
0.0
1.1
2.2
3.3
300.0
0.0
0.0
4.4
600.0
0.3
0.6
0.9
0.0
0.0
1.2
0.2
IDC (A)
IDC (A)
0.4
0.6
0.8
1.0
0.80
1.00
IDC (A)
Temperature Rise vs. IDC
SRF1280A-470M
100.0
SRF1280A-102M
ΔT @ 25 °C
ΔT @ 25 °C
100.0
100.0
80.0
80.0
60.0
60.0
60.0
40.0
ΔT (°C)
80.0
ΔT (°C)
ΔT (°C)
SRF1280A-681M
ΔT @ 25 °C
40.0
20.0
20.0
0.0
20.0
0.0
0.0
0.0
1.13
2.25
3.38
4.50
40.0
0.0
0.28
IDC (A)
0.55
0.83
0.0
1.10
0.20
0.40
0.60
IDC (A)
IDC (A)
Soldering Profile
Temperature
Rising Area
Preheat Area
+4.0 °C / sec. max.
150~200 °C / 60~120 sec.
Reflow Area
Forced Cooling Area
+3.0 °C / sec. max.
-(1.0~5.0) °C / sec. max.
250
Temperature (°C)
217 °C
Peak Temperature:
245 °C max.
60 ~ 150 sec.
60 sec. max.
200
150
Time Above 245 °C:
30 sec. max.
60 ~ 120 sec.
100
Time Above 217 °C:
60 ~ 150 sec. max.
50
0
50
100
150
200
250
Time (Seconds)
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.
3312 - 2 mm
TrimmingShielded
Potentiometer
SRF1280A
SeriesSMD
- Dual-Winding
Power Inductors
Packaging Specifications
2.0 ± 0.5
(.079 ± .020)
330
DIA.
(12.99)
21.0 ± 0.8
(.827 ± .031)
30.4
(1.197)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0 -0
(1.97 -0)
13.0
DIA.
(.512)
24.0
(.945)
26 +0
(1.024 +0)
20.0
(.787)
END
NO COMPONENT
4.0
(.157)
COMPONENTS
START
NO COMPONENT
400
(15.75)
200
(7.87)
USER DIRECTION OF FEED
QTY: 400 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
11/14
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.