SPEC NO: DSAO9956

REV NO: V.1B

DATE: OCT/20/2016

PAGE: 7 OF 8

APPROVED: Wynec

CHECKED: Allen Liu

DRAWN: W.Q.Zhong

ERP: 1102015799

Application Notes

Introduction

Kingbright AAA3528AVU series are surface-mounted right-angle light-emitting diode (LED) circuit-

board indicators. It offers the convenience of surface-mount production while offering the right-angle

height profile of circuit-board indicator lamps. The part is suitable for automated SMT and lead-free

reflow soldering production. The clear silicone lens extends out to provide broad viewing angles.

When installed on customer’s circuit board, it can provide illuminated indication or backlight panel

indicators.

Transport and Storage

Surface mount devices (SMD) are moisture sensitive components. atmospheric moisture will seep

into the component package, so when placed on the circuit board for 160-200°C reflow soldering,

the high temperatures cause the absorbed moisture to vaporize and rapidly expand, creating vapor

pressure that could damage the LED component by causing cracks in the lens, delamination of the

chip and wire bonds, or other reliability issues.

1. Transportation

The product is packed in anti-static, moisture-proof mylar bags. The package should be carefully

handled to avoid external pressure and accidental puncture during transport.Proper anti-static

practices should be in place. If package leakage or damage is found before opening, suggest

customer take the damaged package off-line for additional testing and bake to dry before use.

2. Storage Conditions (Before Opening)

To prevent moisture-absorption reliability issues, the parts must be properly stored. Suggest do

not open the moisture-proof package until immediately before usage (except for sample inspection

purposes).The opened package must be re-sealed with fresh desiccant and humidity indicator and

Stored in a dry box (<30℃/60% RH).

3. Humidity Control (After Opening)

After opening the moisture-proof packaging, immediately check the humidity indicator card contained

inside to confirm the parts have been exposed to excess moisture.The production environment should

follow IPC/JEDEC J-STD-020 standards for temperature,humidity, and exposure time.

SMD environmental exposure time accumulates as long as the parts are outside the packaging,

unless they are being baked dry.

Table 1: IPC/JEDEC J-STD-020 Moisture Sensitivity Levels (MSL)

MSL

Allowed Exposure After Opening

Time

Conditions

LEVEL 1

No Limit

≦

30℃/85%RH

LEVEL 2

1 Year

≦

30℃/60%RH

LEVEL 2a

4 Weeks

≦

30℃/60%RH

LEVEL 3

168 Hours

≦

30℃/60%RH

LEVEL 4

72 Hours

≦

30℃/60%RH

LEVEL 5

48 Hours

≦

30℃/60%RH

LEVEL 5a

24 Hours

≦

30℃/60%RH

LEVEL 6

Immediately upon open

≦

30℃/60%RH

4. Storage of Unused And Remaining Parts

If the full reel was not consumed during production, the production environment was within limits

(<30℃/60% RH), and the exposure time did not exceed the limits in Table 1, then the remaining

parts may be stored as below:

Re-sealed with desiccant.

Stored within a dry box (5% RH). The dry box storage time would not count against the

total exposure time. When the stored parts are taken out, the exposure time is accu-

mulated from the previous production run.