Datasheet

Part No.: 3AKB4SC43 (4550990) Page: 4 of 4
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℃ tenperature 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 cleaing solvent such as isopropyl alcohol to clean the LEDs if necessary.
4.Lead Forming & Assembly
During lead froming, the leads should be bent at point at least 3mm from the base of LED lens.
Do not use the base of the lead frame as a fulcrum during forming.
Lead forming must be done before soldering,at normal temperature.
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:
Temperature
300℃ Max 100℃ Max
Soldering time 3 sec.Max 60sec.Max
(one time only)
260℃ Max
10sec.Max
Note:Excessive soldering temperature and/or time might result in deformation of the LED lens or
catastrophic failure of the LED.
6.Drive Method
An LED is a current-operated device,In order to ensure intensity uniformity on multiple LEDs
connected in parallel in an application,it is recommended that a current limiting resistor be
incorporated in the drive circuit,in series with each LED as shown in Circuit A below.
Circuit model A Circuit model B
MODEL
(A)Recommended circuit
(B)The brightness of each LED might appear different due to the differences in the I-V
characteristics of those LEDs.
7.Protece Of ESD
Since the device is static sensitive,it is recommended that anti-static measures should be taken on human
body,all devices (including soldering iron) and equipment,machinery,desk and ground.
Soldering time
Wave soldering
Soldering iron
CAUTIONS
Pre-heat time
Pre-heat
Solder wave
During assembly on PCB, use minimum clinch force possible to avoid excessive mechanical stress.