100
12.5 ± 0.3
(.492 ± .012)
12.5 ± 0.3
(.492 ± .012)
12.0 ± 0.3
(.472 ± .012)
7.5 ± 0.5
(.295 ± .020)
5.0 ± 0.3
(.197 ± .012)
7.0
(.276) TYP.
2.5 ± 0.15
(.098 ± .006)
2.9
(.114)
2.9
(.114)
5.4
(.213)
6.8
(.268)
Features
■ Shielded construction
■ Inductance range: 4.7 to 1000 µH
■ Heating current up to 8.2 A
■ AEC-Q200 compliant
■ RoHS compliant* and halogen free**
SRR1280A Series - Shielded Power Inductors
Operating Temp. .........-40 °C to +125 °C
(Temperature rise included)
Storage Temp. ............-40 °C to +125 °C
Resistance to Soldering Heat
............................. +245 °C for 10 sec.
Temperature Rise
......................40 °C typ. at rated I rms
Inductance Drop .......... 25 % typ. at I sat
Moisture Sensitivity Level ..................... 1
ESD Classification (HBM) .................N/A
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................... 400 pcs. per reel
Materials
Product Dimensions
Recommended Layout
DIMENSIONS: MM
(INCHES)
How to Order
SRR1280A - 100M
Model
Value Code (see table)
470
Bourns
Part Number
Inductance Q
(Ref.)
Test
Freq.
(MHz)
SRF
(MHz)
Typ.
DCR
(mΩ)
Max.
I rms
(A)
I sat
(A)
L
(μH)
Tol.
(%)
Test Frequency/
Voltage
SRR1280A-4R7Y 4.7 ±30 100 KHz/1 V 22 7.96 30 15.5 8.20 8.80
SRR1280A-6R8Y 6.8 ±30 100 KHz/1 V 20 7.96 22 18.5 7.60 8.00
SRR1280A-8R2Y 8.2 ±30 100 KHz/1 V 22 7.96 20 20.5 6.20 6.80
SRR1280A-100M 10 ±20 1 KHz/1 V 24 2.52 17 19.5 6.00 6.30
SRR1280A-120M 12 ±20 1 KHz/1 V 26 2.52 15 28.0 5.60 6.00
SRR1280A-150M 15 ±20 1 KHz/1 V 26 2.52 13 28.5 5.20 5.00
SRR1280A-180M 18 ±20 1 KHz/1 V 24 2.52 12 35.0 4.80 4.60
SRR1280A-220M 22 ±20 1 KHz/1 V 20 2.52 11 38.6 4.30 4.10
SRR1280A-270M 27 ±20 1 KHz/1 V 26 2.52 10 52.0 3.90 3.70
SRR1280A-330M 33 ±20 1 KHz/1 V 28 2.52 9.5 57.0 3.50 3.30
SRR1280A-390M 39 ±20 1 KHz/1 V 24 2.52 8.5 70.0 3.20 3.10
SRR1280A-470M 47 ±20 1 KHz/1 V 24 2.52 7.5 80.0 2.90 2.80
SRR1280A-560M 56 ±20 1 KHz/1 V 24 2.52 7 100.0 2.60 2.50
SRR1280A-680M 68 ±20 1 KHz/1 V 20 2.52 6.5 120.0 2.40 2.30
SRR1280A-820M 82 ±20 1 KHz/1 V 20 2.52 5 130.0 2.30 2.20
SRR1280A-101M 100 ±20 1 KHz/1 V 18 0.796 4.5 150.0 2.10 2.00
SRR1280A-121K 120 ±10 1 KHz/1 V 16 0.796 4.3 200.0 1.95 1.95
SRR1280A-151K 150 ±10 1 KHz/1 V 24 0.796 4.1 270.0 1.85 1.90
SRR1280A-181K 180 ±10 1 KHz/1 V 24 0.796 4 300.0 1.75 1.88
SRR1280A-221K 220 ±10 1 KHz/1 V 24 0.796 3.4 400.0 1.60 1.70
SRR1280A-271K 270 ±10 1 KHz/1 V 20 0.796 3.1 450.0 1.20 1.60
SRR1280A-331K 330 ±10 1 KHz/1 V 18 0.796 2.9 600.0 1.10 1.40
SRR1280A-391K 390 ±10 1 KHz/1 V 20 0.796 2.7 680.0 1.00 1.40
SRR1280A-471K 470 ±10 1 KHz/1 V 20 0.796 2.2 880.0 0.90 1.25
SRR1280A-561K 560 ±10 1 KHz/1 V 20 0.796 2 960.0 0.80 1.15
SRR1280A-681K 680 ±10 1 KHz/1 V 26 0.796 1.7 1300.0 0.75 0.97
SRR1280A-821K 820 ±10 1 KHz/1 V 20 0.796 1.4 1500.0 0.70 0.94
SRR1280A-102K 1000 ±10 1 KHz/1 V 40 0.252 1.3 1700.0 0.68 0.80
Electrical Schematic
*RoHS and
AEC-Q200 COMPLIANT
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**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.
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on
the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf
SRF0504 Series - Line Filter
SRR1280A Series - Shielded Power Inductors
200
Max. Peak Temperature -5 30 sec. max.
Max. Time Above 217 : 60~150 sec. max.
Peak Temperature 245 max.
250
150
200
100
50
0
Temperature (°C)
10050 150
Time (Seconds)
+4.0 °C/Sec. Max. 150~200 °C / 60~120 Sec. +3.0 °C/Sec. Max. -(1.0~5.0) °C/Sec. Max.
Temperature
Rising Area
Preheat
Area
Reflow
Area
Forced
Cooling Area
250
Peak Temperature: 245 °C
217 °C
60~120 Sec.
60 Sec.
Max.
60~150 Sec.
L vs. IDC
3.50
3.60
3.70
3.80
3.90
4.00
4.10
4.20
4.30
4.40
4.50
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
0.0
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2
0.0
200.0
400.0
600.0
800.0
1,000.0
1,200.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
SRR1280A-4R7Y
SRR1280A-270M
SRR1280A-471K
SRR1280A-102K
IDC (A)
L (uH)
IDC (A)
L (uH)
IDC (A)
L (uH)
IDC (A)
L (uH)
L @ 25 ℃L @ 125 ℃L @ 25 ℃L @ 125 ℃
L @ 25 ℃L @ 125 ℃L @ 25 ℃L @ 125 ℃
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
SRR1280A Series - Shielded Power Inductors
DIMENSIONS: MM
(INCHES)
QTY: 400 PCS. PER REEL
26 +0
(1.024 +0)
30.4
(1.197)
2.0 ± 0.5
(.079 ± .020)
60.0 -0
(2.362 -0)
330
(12.99)DIA.
13.0
(.512) DIA.
13.0
(.512)
DIA.
21.0 ± 0.8
(.827 ± .031)
24.0
(.945)
200
(7.87)
NO COMPONENT NO COMPONENTCOMPONENTS
400
(15.75)
START
4.0
(.157)
20.0
(.787)
24
(.945)
END
100 100 100
Temperature vs. IDC
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
SRR1280A-4R7Y
SRR1280A-270M
SRR1280A-471K
SRR1280A-102K
IDC (A)
T (°C)
IDC (A)
T (°C)
IDC (A)
T (°C)
IDC (A)
T (°C)
T @ 25 ℃T @ 25 ℃
T @ 25 ℃T @ 25 ℃
USER DIRECTION OF FEED
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
SRR1280A Series - Shielded Power Inductors
REV. 05/18
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 520 390 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
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also apply to such Bourns® custom products.
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bilingual versions are available at:
Web Page:
http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf
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