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LTL-4221N Datasheet(PDF) 5 Page - Lite-On Technology Corporation

Part No. LTL-4221N
Description  High Intensity.
Download  7 Pages
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Maker  LITEON [Lite-On Technology Corporation]
Homepage  http://www.liteon.com.tw/databook/default.htm

LTL-4221N Datasheet(HTML) 5 Page - Lite-On Technology Corporation

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1. Application
The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment,
communication equipment and household applications).Consult Liteon’s Sales in advance for information on
applications in which exceptional reliability is required, particularly when the failure or malfunction of the
LEDs may directly jeopardize life or health (such as in aviation, transportation, traffic control equipment,
medical and life support systems and safety devices).
2. Storage
The storage ambient for the LEDs should not exceed 30°C temperature or 70% relative humidity.
It is recommended that LEDs out of their original packaging are used within three months.
For extended storage out of their original packaging, it is recommended that the LEDs be stored in
a sealed container with appropriate desiccant or in desiccators with nitrogen ambient.
3. Cleaning
Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LEDs if necessary.
4. Lead Forming & Assembly
During lead forming, the leads should be bent at a point at least 3mm from the base of LED lens.
Do not use the base of the leadframe as a fulcrum during forming.
Lead forming must be done before soldering, at normal temperature.
During assembly on PCB, use minimum clinch force possible to avoid excessive mechanical stress.
5. Soldering
When soldering, leave a minimum of 2mm clearance from the base of the lens to the soldering point.
Dipping the lens into the solder must be avoided.
Do not apply any external stress to the lead frame during soldering while the LED is at high temperature.
Recommended soldering conditions :
Soldering iron
Wave soldering
Soldering time
300°C Max.
3 sec. Max.
(one time only)
Pre-heat time
Solder wave
Soldering time
100°C Max.
60 sec. Max.
260°C Max.
10 sec. Max.
Note: Excessive soldering temperature and/or time might result in deformation of the LED lens or
catastrophic failure of the LED. IR reflow is not suitable process for through hole type LED lamp
Part No. : LTL-4221N
Page : 5

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