Features

dual-inductor and transformer

μH

Applications

- Driver assistant

- Entertainment

- Information

- Lighting

SRF1280A Series - Dual-Winding Shielded Power Inductors

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

Inductance drop................... 30 % at Isat

Electrical Specifications @ 25 °C

General Specifications

Core..............................................Ferrite

Wire ............................Enameled copper

Terminal Finish ...................................Sn

Packaging.................... 400 pcs. per reel

Materials

Product Dimensions

DIMENSIONS:

MM

(INCHES)

How to Order

SRF1280A - 100M

Model

Value Code (see table)

* 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.

Bourns

Part No.

Parallel Rating

Series Rating

Inductance

@ 100 KHz

L (

μH)

Tol.

(%)

DCR

(

Ω)

Max.

Irms

(A)

Isat

(A)

Inductance

@ 100 KHz

L (

μH)

Tol.

(%)

DCR

(

Ω)

Max.

Irms

(A)

Isat

(A)

SRF1280A-R47Y

0.47

± 30

0.0055

17.9

56

1.88

± 30

0.0216

8.94

28

SRF1280A-1R0Y

1.0

± 30

0.0067

15.5

40

4

± 30

0.026

7.74

20

SRF1280A-1R5Y

1.5

± 30

0.0076

13.5

31.1

6

± 30

0.0306

6.77

15.6

SRF1280A-2R2Y

2.2

± 30

0.0092

12.5

25.5

8.8

± 30

0.0338

6.23

12.7

SRF1280A-3R3Y

3.3

± 30

0.011

10.4

21.5

13.2

± 30

0.04

5.23

10.8

SRF1280A-4R7Y

4.7

± 30

0.0135

8.25

16.5

18.8

± 30

0.05

4.13

8.24

SRF1280A-6R8Y

6.8

± 30

0.0183

7.34

13.3

27.2

± 30

0.0656

3.67

6.67

SRF1280A-8R2Y

8.2

± 30

0.0191

6.32

12.2

32.8

± 30

0.0714

3.16

6.09

SRF1280A-100M

10

± 20

0.0241

6.04

11.2

40

± 20

0.0921

3.02

5.6

SRF1280A-150M

15

± 20

0.0333

5.03

9.66

60

± 20

0.129

2.51

4.83

SRF1280A-220M

22

± 20

0.0503

4

7.57

88

± 20

0.192

2

3.78

SRF1280A-330M

33

± 20

0.0664

3.23

6.22

132

± 20

0.265

1.61

3.11

SRF1280A-470M

47

± 20

0.0898

2.95

5.28

188

± 20

0.353

1.47

2.64

SRF1280A-680M

68

± 20

0.123

2.44

4.44

272

± 20

0.469

1.22

2.22

SRF1280A-820M

82

± 20

0.153

2.09

4.06

328

± 20

0.578

1.04

2.03

SRF1280A-101M

100

± 20

0.175

1.96

3.64

400

± 20

0.701

0.98

1.82

SRF1280A-151M

150

± 20

0.261

1.59

3.01

600

± 20

1.013

0.796

1.51

SRF1280A-221M

220

± 20

0.343

1.29

2.43

880

± 20

1.38

0.645

1.22

SRF1280A-331M

330

± 20

0.54

1.04

2.01

1320

± 20

2.172

0.522

1.01

SRF1280A-471M

470

± 20

0.865

0.85

1.68

1880

± 20

3.3

0.427 0.838

SRF1280A-681M

680

± 20

1.296

0.76

1.39

2720

± 20

4.888

0.38

0.697

SRF1280A-821M

820

± 20

1.632

0.65

1.27

3280

± 20

5.896

0.325 0.633

SRF1280A-102M

1000

± 20

1.992

0.61

1.14

4000

± 20

7.202

0.307 0.571

12.50

(.492)

MAX.

MAX.

12.50

(.492)

MAX.

8.00

(.315)

4

3

1

2

1.80 ± 0.2

(.071 ± .008)

5.00 ± 0.3

(.197 ± .012)

5.00 ± 0.3

(.197 ± .012)

1

2

34

1

2

4

3

DUAL INDUCTOR MODE

SERIES MODE

2.15

(.085)

2.15

(.085)

1.28

(.050)

1.28

(.050)

4.50

(.204)

4.50

(.204)

13.00

(.512)

13.00

(.512)

Recommended Layout

Electrical Schematic

DIMENSIONS:

MM

(INCHES)

N2

2

4

N1

1

3

N2

2

4

N1

1

3

N2

2

4

N1

1

3

PARALLEL

SERIES

101