4,5 ±0,3

3,6 ±0,3

3,2 ±0,3

1,6 ref.

1,3 ref.

1,6 ref.

sectional drawing A-A

Scale - 5:1

A

A

Marking

3R9 (Inductance Code)

Product Marking:

Recommended Land Pattern: [mm]

5,4 ref.

1,4 ref.

2 ref.

Scale - 5:1

Schematic:

Properties

Test conditions

Value

Unit

Tol.

Inductance

1 MHz/ 100 mV

L

3.9

µH

±20

Rated Current

ΔT = 40 K

1.32

A

max.

Saturation Current

|ΔL/L| < 10 %

2.5

A

typ.

DC Resistance

@ 20 °C

0.14

Ω

max.

Self Resonant Frequency

54

MHz

typ.

Q-factor

1 MHz/ 100 mV

Q

40

ref.

Electrical Properties:

It is recommended that the temperature of the component does not exceed +125°C under worst

case conditions

Ambient Temperature (refering to

-40 °C up to +85 °C

Operating Temperature

-40 °C up to +125 °C

Storage Temperature (in original

packaging)

-20 °C up to +40 °C

Test conditions of Electrical Properties: +20°C, 33% RH if not specified differently

General Properties:

Würth Elektronik eiSos GmbH & Co. KG

EMC & Inductive Solutions

Max-Eyth-Str. 1

74638 Waldenburg

Germany

Tel. +49 (0) 79 42 945 - 0

www.we-online.com

eiSos@we-online.com

CREATED

CHECKED

GENERAL TOLERANCE

PROJECTION

METHOD

KaS

JRS

DIN ISO 2768-1m

DESCRIPTION

WE-LQ SMD Inductor

ORDER CODE

7440450039

SIZE

REVISION

STATUS

DATE (YYYY-MM-DD)

BUSINESS UNIT

PAGE

1812

004.000

Valid

2016-12-20

eiSos

1/6

This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH

& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety

must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.