100
12.5 ± 0.3
(.492 ± .012)
12.5 ± 0.3
(.492 ± .012)
7.5 ± 0.5
(.295 ± .020)
5.0 ± 0.3
(.197 ± .012)
7.0
(.276)
TYP.
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 qualifi ed
■ RoHS compliant* and halogen free**
Applications
■ Automotive systems:
- Driver assistant
- Information
- Entertainment
- Lighting
■ DC/DC converters
■ Power supplies
SRR1280A Series - Shielded Power Inductors
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-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
Electrical Specifi cations @ 25 °C General Specifi cations
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)
*RoHS COMPLIANT
& AEC-Q200 QUALIFIED
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing defi nition 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.
Specifi cations 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 specifi c applications.
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
