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8.2. criteria for judging the damage

item

symbol

test condition

criteria for judgement

min

max

forward voltage

-

luminous intensity

-

9. Cautions

White LEDs are devices which are materialized by combining Blue LEDs and special phosphors.

Consequently, the color of White LEDs is subject to change a little by an operating current. Care

should be taken after due consideration when using LEDs.

(1) Moisture-Proof Package

• When moisture is absorbed into the SMT package it may vaporize and expand products during

soldering. There is a possibility that this may cause exfoliation of the contacts and damage to the

optical characteristics of the LEDs. For this reason, the moisture-proof package is used to keep

moisture to a minimum in the package.

• A package of a moisture-absorbent material (silica gel) is inserted into the shielding bag. The

silica gel changes its color from blue to pink as it absorbs moisture.

(2) Storage

• Storage Conditions

- After opening the package :

The LEDs should be kept at 5 ~40

or less and 30%RH or less. The LEDs should be used within

℃℃

a year. When storing the LEDs, moisture-proof packaging with moisture-absorbent material (silica

gel) is

recommended. If unused LEDs remain, they should be stored in moisture-proof packages, such as

sealed containers with packages of moisture-absorbent material (silica gel). It is also

recommended to return the LEDs to the original moisture-proof bag and to reseal the moisture-

proof bag again.

• If the moisture-absorbent material (silica gel) has faded away or the LEDs have exceeded the

recommended storage time, baking treatment should be performed using the following conditions.

- Baking treatment : LED bulk: more than 12 hours at 125±5℃

LED Reel: more than 24 hours at 60±5℃

• Luxpia's LED electrode sections are comprised of a silver-plated copper alloy. The silver surface

may be affected by environments which contain corrosive gases and so on. Please avoid condition

which may cause difficulty during soldering operations. It is recommended that the User use the

LEDs as soon as possible.