4

RELIABILITY

4.1 Test Item and Result

Test Item

Test Condition

Result

Consecutive operating

lifetime test

If=20mA / DC, Ta=25℃, t=1,000hours

0/18

High temperature

storage lifetime test

Ta=85℃, t=1,000hours

0/18

Temperature humidity

storage lifetime test

Ta=60℃, RH=90%, t=1,000hours

0/18

Reflow heat test

T=240℃(Max), t=10sec.

Reflow soldering

0/18

Note)

・The reliability guarantee criterion is defined by MIL-S-19500H. The data shows LTPD is 15%.

4.2 Criteria For Judging The Damage

Criteria for Judgement

Item

Symbol

Test Conditions

Min.

Max.

Forward Voltage

Vf

If=20mA

-

U.S.L.x1.1

Luminous Intensity

Iv

If=20mA

L.S.L.x0.5

-

Note)

・U.S.L.: Upper Standard Level., L.S.L: Lower Standard Level.

5

CAUTIONS

Care should be taken after due consideration when using LEDs.

5.1 Storage

・

Store at room temperature (25±3℃) and under low humidity (RH lower than 50%).

5.2 Static Electricity

・

Static electricity or surge voltage damages the LEDs. It is recommended to use a wristband or

an anti-electrostatic glove when handling the LEDs.

5.3 Soldering Conditions

・

Reflow soldering should be performed at the peak temperature under 240℃ and less than 10

seconds.

・

Hand repair soldering should be performed at temperatures under 300℃ and less than 3

seconds. (one time only)

5.4 Cleaning

・

It is recommended to use isopropyl alcohol as a solvent for cleaning the LEDs. When using

other solvents, it should be confirmed before hand whether the solvents dissolve the resin or

not. Freon solvent should not be used to clean the LEDs because of worldwide regulations.

・

Do not clean the LEDs by the ultrasonic. When it is absolutely necessary, the influence of

ultrasonic cleaning on the LEDs depends on the factors such as ultrasonic power and the

assembled condition. Before cleaning pre-test should be done to confirm will not cause any

damage to the LEDs.