Features

■

Semi-shielded construction

■

Low profile: 1.2 mm

■

Inductance range: 0.47 to 22 µH

■

Rated current up to 3.2 A

■

RoHS compliant* and halogen free**

Applications

■

DC/DC converters

■

Notebook computers

■

Digital video cameras

■

HDDs

■

Cellphones

■

Televisions, LCD displays

SRN4012T Series - Semi-shielded Power Inductors

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.

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

Rated Current

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

Electrical Specifications @ 25 °C

Bourns Part No.

Inductance

@ 100 KHz / 1 V

Q (Min.)

@

100 kHz /

1 V

SRF

(MHz)

Typ.

DCR

(Ω)

±20 %

Irms

(A)

Isat

(A)

L (μH)

Tol. %

SRN4012T-R47M

0.47

± 20

6

140

0.025

3.2

4

SRN4012T-1R0M

1.0

± 20

6

100

0.042

2.2

2.8

SRN4012T-1R5M

1.5

± 20

6

90

0.05

2

2.2

SRN4012T-2R2M

2.2

± 20

6

70

0.06

1.9

1.65

SRN4012T-3R3M

3.3

± 20

6

60

0.07

1.7

1.4

SRN4012T-4R7M

4.7

± 20

6

45

0.095

1.5

1.2

SRN4012T-6R8M

6.8

± 20

6

35

0.125

1.3

0.9

SRN4012T-100M

10

± 20

10

30

0.18

1.1

0.8

SRN4012T-150M

15

± 20

10

24

0.26

0.75

0.65

SRN4012T-220M

22

± 20

10

18

0.4

0.62

0.5

General Specifications

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

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

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

Coating .................Magnetic epoxy resin

Packaging..... 4500 pcs. per 13-inch reel

Materials

Product Dimensions

Recommended Layout

Electrical Schematic

DIMENSIONS:

MM

(INCHES)

How to Order

SRN4012T - R47M

Model

Value Code (see table)

Soldering Profile

4.2

(.165)

4.2

(.165)

4.0 ± 0.2

(.157 ± .008)

4.0 ± 0.2

(.157 ± .008)

1.2

(.047)

1.2

(.047)

MAX.

2.5

(.098)

REF.

1.1

(.043)

REF.

1.1

(.043)

REF.

25

Time (Seconds)

Preheating

Soldering

Natural Cooling

217 °C

tp (245 °C, 20~40 Sec.)

200 °C

150°C

60~180

Sec.

480 Sec. Max.

60~150 Sec.

TP (260 °C / 10 Sec. Max.)

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

**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