SRF1280A Series - Dual-Winding Shielded Power Inductors

101

Features

■

Multiple applications: parallel, series,

dual-inductor and transformer

■

Magnetically shielded, low radiation

■

Inductance range: 0.47 to 1000 μH

■

Rated current up to 17.9 A

■

AEC-Q200 compliant

■

RoHS compliant* and halogen free**

Applications

■

DC/DC converters

■

Power supplies

■

SEPIC - DC/DC converters

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

1.676

± 30

0.0216

8.94

28

SRF1280A-1R0Y

1.0

± 30

0.0067

15.5

40

3.284

± 30

0.026

7.74

20

SRF1280A-1R5Y

1.5

± 30

0.0076

13.5

31.1

5.428

± 30

0.0306

6.77

15.6

SRF1280A-2R2Y

2.2

± 30

0.0092

12.5

25.5

8.108

± 30

0.0338

6.23

12.7

SRF1280A-3R3Y

3.3

± 30

0.011

10.4

21.5

11.320

± 30

0.04

5.23

10.8

SRF1280A-4R7Y

4.7

± 30

0.0135

8.25

16.5

19.360

± 30

0.05

4.13

8.24

SRF1280A-6R8Y

6.8

± 30

0.0183

7.34

13.3

29.550

± 30

0.0656

3.67

6.67

SRF1280A-8R2Y

8.2

± 30

0.0191

6.32

12.2

35.440

± 30

0.0714

3.16

6.09

SRF1280A-100M

10

± 20

0.0241

6.04

11.2

41.880

± 20

0.0921

3.02

5.6

SRF1280A-150M

15

± 20

0.0333

5.03

9.66

56.360

± 20

0.129

2.51

4.83

SRF1280A-220M

22

± 20

0.0503

4

7.57

91.720

± 20

0.192

2

3.78

SRF1280A-330M

33

± 20

0.0664

3.23

6.22

135.700

± 20

0.265

1.61

3.11

SRF1280A-470M

47

± 20

0.0898

2.95

5.28

188.200

± 20

0.353

1.47

2.64

SRF1280A-680M

68

± 20

0.123

2.44

4.44

265.900

± 20

0.469

1.22

2.22

SRF1280A-820M

82

± 20

0.153

2.09

4.06

319.000

± 20

0.578

1.04

2.03

SRF1280A-101M

100

± 20

0.175

1.96

3.64

397.200

± 20

0.701

0.98

1.82

SRF1280A-151M

150

± 20

0.261

1.59

3.01

579.600

± 20

1.013

0.796

1.51

SRF1280A-221M

220

± 20

0.343

1.29

2.43

886.000

± 20

1.38

0.645

1.22

SRF1280A-331M

330

± 20

0.54

1.04

2.01

1294.000

± 20

2.172

0.522

1.01

SRF1280A-471M

470

± 20

0.865

0.85

1.68

1868.000

± 20

3.3

0.427 0.838

SRF1280A-681M

680

± 20

1.296

0.76

1.39

2707.000

± 20

4.888

0.38

0.697

SRF1280A-821M

820

± 20

1.632

0.65

1.27

3272.000

± 20

5.896

0.325 0.633

SRF1280A-102M

1000

± 20

1.992

0.61

1.14

4020.000

± 20

7.202

0.307 0.571

Electrical Schematic

N2

2

4

N1

1

3

N2

2

4

N1

1

3

N2

2

4

N1

1

3

PARALLEL

SERIES

Recommended Layout

DUAL INDUCTOR MODE

2.15

(.085)

1.28

(.050)

4.50

(.177)

13.00

(.512)

2

3

1

4

SERIES MODE

2.15

(.085)

1.28

(.050)

4.50

(.177)

13.00

(.512)

12

43

DIMENSIONS:

MM

(INCHES)

DIMENSIONS:

MM

(INCHES)

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

Operating Temperature

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

(Temperature rise included)

Storage Temperature

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

Temperature Rise

.......................40 °C typ. at rated

Irms

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

Hi-pot (N1-N2) ................500 Vac/60 Hz,

3 mA, 1 sec

Moisture Sensitivity Level

ESD Classification (HBM)

..................... 1

................. N/A

Materials

General Specifications

Electrical Specifications @ 25 °C

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

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

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

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

Product Dimensions

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)

DOT

INDICATES

TERMINAL 1

* RoHS Directive 2015/863, Mar 31, 2015 and Annex.

** 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.