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7.CAUTIONS

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

Consequently, the color of the LEDs is changed 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 during soldering.

There is a possibility that this can 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.

· The moisture proof package is made of an aluminum moisture proof bag.

A package of

a moisture absorbent material (silica gel) is inserted into the aluminum moisture proof bag.

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

(2) Storage

· Storage Conditions

Before opening the package :

The LEDs should be kept at 30°C or less and 90%RH or less.

The LEDs should be used within a

year.

When storing the LEDs, moisture proof packaging with absorbent material (silica gel)

is recommended.

After opening the package :

The LEDs should be kept at 30°C or less and 70%RH or less.

The LEDs should be soldered

within 168 hours (7days) after opening the package.

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 storage

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

Baking treatment : more than 24 hours at 65 ± 5°C

· This product has silver plated metal parts that are inside and/or outside the package body.

The silver

plating becomes tarnished when being exposed to an environment which contains corrosive gases.

Any LED with tarnished leads may lead to poor solderability and deterioration of optical characteristics.

Please do not expose the LEDs to corrosive atmosphere during storage.

· After assembly and during use, silver plating can be affected by the corrosive gases emitted by

components and materials in close proximity of the LEDs within an end product, and the gases entering

into the product from the external atmosphere.

The above should be taken into consideration when

designing.

· Please avoid rapid transitions in ambient temperature, especially in high humidity environments where

condensation can occur.

Nichia STS-DA1-0021

<Cat.No.071029>