7.2

(.283)

1.8

(.071)

1.8

(.071)

3.6

(.142)

REF.

REF.

REF.

REF.

7.4

(.291)

TYP.

TYP.

10.0 ± 0.3

(.394 ± .012)

3.4

(.134)

TYP.

3.2

(.126)

TYP.

3.4

(.134)

2.8 ± 0.3

(.110 ± .012)

10.0 ± 0.3

(.394 ± .012)

Features

Applications

• Portable communication equipment

• Camcorders

• LCD TVs

• Car radios

SRU1028 Series - Shielded SMD Power Inductors

Test Voltage .......................................1 V

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 Soldering Heat

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

Electrical Specifications @ 25 °C

General Specifications

Core....................Ferrite DR and RI core

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

Terminal ....................................Ag/Ni/Sn

Rated Current

................... Ind. drop 35 % typ. at Isat

Temperature Rise

.....................40 °C max. at rated Irms

Packaging.................. 1000 pcs. per reel

Materials

Product Dimensions

Recommended Layout

DIMENSIONS:

MM

(INCHES)

* 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.

Bourns

Part Number

Inductance

@ 100 KHz

Q

Ref.

Test

Freq.

(MHz)

SRF

Min.

(MHz)

RDC

(m

Ω)

I rms

Max.

(A)

I sat

Typ.

(A)

**K-

Factor

L (µH)

Tol.

(%)

SRU1028-1R0Y

1.0

±30

14

7.96

100.0

4.9

7.00

8.00

315

SRU1028-1R5Y

1.5

±30

12

7.96

80.0

7.3

6.50

6.50

245

SRU1028-2R2Y

2.2

±30

12

7.96

65.0

11

5.30

4.80

200

SRU1028-3R3Y

3.3

±30

14

7.96

55.0

15

4.60

4.30

169

SRU1028-4R7Y

4.7

±30

12

7.96

40.0

16

4.50

3.80

147

SRU1028-6R8Y

6.8

±30

12

7.96

30.0

15

3.50

3.00

130

SRU1028-8R2Y

8.2

±30

12

7.96

28.0

28

3.30

2.70

116

SRU1028-100Y

10.0

±30

20

7.96

25.0

40

2.80

2.40

105

SRU1028-120Y

12.0

±30

22

2.52

23.0

70

2.40

2.30

93

SRU1028-150Y

15.0

±30

26

2.52

22.0

69

2.00

2.00

82

SRU1028-220Y

22.0

±30

26

2.52

16.0

104

1.60

1.40

71

SRU1028-330Y

33.0

±30

24

2.52

12.0

139

1.25

1.20

60

SRU1028-470Y

47.0

±30

20

2.52

11.0

167

1.30

1.10

49

SRU1028-560Y

56.0

±30

22

2.52

10.0

208

1.10

1.00

43

SRU1028-680Y

68.0

±30

20

2.52

9.0

232

1.00

0.90

39

SRU1028-820Y

82.0

±30

20

2.52

8.0

323

0.90

0.85

36

SRU1028-101Y

100.0

±30

20

0.796

7.0

365

0.85

0.80

33

SRU1028-121Y

120.0

±30

18

0.796

6.0

428

0.65

0.70

31

SRU1028-151Y

150.0

±30

18

0.796

5.0

518

0.70

0.65

27

**K-Factor: To calculate core flux density, Bp-p (gauss) = K x L(µH) x

Δ I (peak-to-peak ripple current, A),

determine core loss from Core Loss vs. Flux Density plot.

Core Loss vs. Flux Density

Flux Density Bp-p (gauss)

100

1000

10000

10

100

1000

1 MHz

500 KHz

300 KHz

200 KHz

100 KHz

50 KHz

10000

1

0.1

100