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)

Features

dual-inductor and transformer

μH

Applications

- Communication equipment

- Notebooks, desktop computers,

servers

- LCDs, flat panels, backlights

- Camcorders, HDTVs, car audio

systems

SRF1280 Series - Dual-Winding Shielded Power Inductors

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

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.

Test Voltage ..................................0.25 V

Hi-pot .................500 Vrms, 3 mA, 3 sec.

Reflow Soldering .. 230 °C; 50 sec. max.

Operating Temperature

................................. -40 °C to +125 °C

(Temperature rise included)

Storage Temperature .. -40 °C to +125 °C

Resistance to Solder Heat

...............................+260 °C for 10 sec.

Electrical Specifications @ 25 °C

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)

SRF1280-R47Y

0.47

±30

0.0055

17.9

56

1.88

±30 0.0216

8.94

28

SRF1280-1R0Y

1.0

±30

0.0067

15.5

40

4

±30

0.026

7.74

20

SRF1280-1R5Y

1.5

±30

0.0076

13.5

31.1

6

±30 0.0306

6.77

15.6

SRF1280-2R2Y

2.2

±30

0.0092

12.5

25.5

8.8

±30 0.0338

6.23

12.7

SRF1280-3R3Y

3.3

±30

0.011

10.4

21.5

13.2

±30

0.04

5.23

10.8

SRF1280-4R7Y

4.7

±30

0.0135

8.25

16.5

18.8

±30

0.05

4.13

8.24

SRF1280-6R8Y

6.8

±30

0.0183

7.34

13.3

27.2

±30 0.0656

3.67

6.67

SRF1280-8R2Y

8.2

±30

0.0191

6.32

12.2

32.8

±30 0.0714

3.16

6.09

SRF1280-100M

10

±20

0.0241

6.04

11.2

40

±20 0.0921

3.02

5.6

SRF1280-150M

15

±20

0.0333

5.03

9.66

60

±20

0.129

2.51

4.83

SRF1280-220M

22

±20

0.0503

4

7.57

88

±20

0.192

2

3.78

SRF1280-330M

33

±20

0.0664

3.23

6.22

132

±20

0.265

1.61

3.11

SRF1280-470M

47

±20

0.0898

2.95

5.28

188

±20

0.353

1.47

2.64

SRF1280-680M

68

±20

0.123

2.44

4.44

272

±20

0.469

1.22

2.22

SRF1280-820M

82

±20

0.153

2.09

4.06

328

±20

0.578

1.04

2.03

SRF1280-101M

100

±20

0.175

1.96

3.64

400

±20

0.701

0.98

1.82

SRF1280-151M

150

±20

0.261

1.59

3.01

600

±20

1.013

0.796

1.51

SRF1280-221M

220

±20

0.343

1.29

2.43

880

±20

1.38

0.645

1.22

SRF1280-331M

330

±20

0.54

1.04

2.01

1320

±20

2.172

0.522

1.01

SRF1280-471M

470

±20

0.865

0.85

1.68

1880

±20

3.3

0.427 0.838

SRF1280-681M

680

±20

1.296

0.76

1.39

2720

±20

4.888

0.38

0.697

SRF1280-821M

820

±20

1.632

0.65

1.27

3280

±20

5.896

0.325 0.633

SRF1280-102M

1000

±20

1.992

0.61

1.14

4000

±20

7.202

0.307 0.571

General Specifications

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

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

Base ................................................ LCP

Adhesive.............................. Epoxy resin

Terminal ..............................................Sn

Rated Current

............ Inductance drops 30 % at Isat

Temperature Rise .....40 °C at rated Irms

Packaging....... 400 pcs. per 13-inch reel

Materials

Product Dimensions

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

How to Order

SRF1280 - 100M

Model

Value Code (see table)

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)

101