NICHIA STS-DA1-3577A <Cat.No.150421>

21

CAUTIONS

(1) Storage

Conditions

Temperature

Humidity

Time

Before Opening Aluminum Bag

≤30°C

≤90%RH

Within 1 Year from Delivery Date

Storage

After Opening Aluminum Bag

≤30°C

≤70%RH

≤168hours

● After opening the moisture-proof aluminum bag, the products should go through the soldering process

within the range of the conditions stated above. Unused remaining LEDs should be stored with silica gel desiccants

in a hermetically sealed container, preferably the original moisture-proof bags for storage.

● Although the leads or electrode pads (anode and cathode) of the product are plated with gold,

prolonged exposure to a corrosive environment might cause the gold plated the leads or electrode pads to tarnish.

If unused LEDs remain, they must be stored in a hermetically sealed container.

Nichia recommends using the original moisture-proof bag for storage.

● Do not use sulfur-containing materials in commercial products. Some materials, such as seals and adhesives, may contain sulfur.

The contaminated plating of LEDs might cause an open circuit. Silicone rubber is recommended as a material for seals.

Bear in mind, the use of silicones may lead to silicone contamination of electrical contacts inside the products,

caused by low molecular weight volatile siloxane.

● To prevent water condensation, please avoid large temperature and humidity fluctuations for the storage conditions.

● Do not store the LEDs in a dusty environment.

● Do not expose the LEDs to direct sunlight and/or an environment where the temperature is higher than

normal room temperature.

(2) Directions for Use

● When designing a circuit, the current through each LED must not exceed the Absolute Maximum Rating.

Operating at a constant current per LED is recommended. In case of operating at a constant voltage, Circuit B is recommended.

If the LEDs are operated with constant voltage using Circuit A, the current through the LEDs may vary due to the variation

in Forward Voltage characteristics of the LEDs.

(A)

(B)

● This product should be operated using forward current. Ensure that the product is not subjected to

either forward or reverse voltage while it is not in use. In particular, subjecting it to continuous reverse voltage

may cause migration, which may cause damage to the LED die. When used in displays that are not used for a long time,

the main power supply should be switched off for safety.

● Pulse width modulation (PWM) is recommended for dimming LEDs as color point changes with drive current.

● It is recommended to operate the LEDs at a current greater than 10% of the sorting current to stabilize the LED characteristics.

● Ensure that excessive voltages such as lightning surges are not applied to the LEDs.

● For outdoor use, necessary measures should be taken to prevent water, moisture and salt air damage.

(3) Handling Precautions

● Do not handle the LEDs with bare hands as it will contaminate the LED surface and may affect the optical characteristics:

it might cause the LED to be deformed and/or the wire to break, which will cause the LED not to illuminate.

● When handling the product with tweezers, be careful not to apply excessive force to the resin.

Otherwise, The resin can be cut, chipped, delaminate or deformed, causing wire-bond breaks and catastrophic failures.

● Dropping the product may cause damage.

● Do not stack assembled the products. Failure to comply can cause the resin portion of the product to be cut, chipped,

delaminated and/or deformed. It may cause wire to break, leading to catastrophic failures.