NICHIA STS-DA1-2524A <Cat.No.120801>

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CAUTIONS

(1) Lead Forming

● When forming leads, the leads should be bent at a point at lease 3mm from the base of the epoxy bulb.

Do not use the base of the leadframe as a fulcrum during lead forming.

● Lead forming should be done before soldering.

● Do not apply any bending stress to the base of the lead.

The stress to the base may damage the LED's characteristics or it may break the LEDs.

● When mounting the product onto a printed circuit board, the via-holes on the board should be exactly aligned

with the lead pitch of the product. If the LEDs are mounted with stress at the leads, it causes deterioration of the epoxy resin

and this will degrade the LEDs.

(2) Storage

● Shelf life of the products in unopened bag is 3 months(max.) at <30°C and 70% RH from the delivery date.

If the shelf life exceeds 3 months or more, the LEDs need to be stored in a sealed container

with silica gel desiccants to ensure their shelf life will not exceed 1 year.

● Customer is advised to store properly the products in controlled ambient

and complete immediately all high temperature related process including soldering as exposure to corrosive environment

might cause the plated metal parts of the product to tarnish, which might lead to difficulties in soldering.

● To avoid condensation, the products must not be stored in the areas where temperature and humidity fluctuate greatly.

(3) 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)

● LEDs should be operated in forward bias. Driving circuits must not subject LEDs to either forward or reverse voltage while off.

Continuous reverse voltage can cause migration and LED damage.

● For stabilizing the LED characteristics, it is recommended to operate at greater than 10% nominal current.

● Operating this product with a pulsating current will result in a different color than operated with direct current.

Ensure there will be no issues for the chosen application prior to use.

● Care must be taken to ensure that the reverse voltage will not exceed the Absolute Maximum Rating

when using the LEDs with matrix drive.

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

(4) Handling Precautions

● Do not handle LEDs with bare hands, it may contaminate the LED surface and affect optical characteristics.

In the worst case, catastrophic failure from excess pressure through wire-bond breaks and package damage may result.

● Dropping the product may cause damage.

● Do not stack assembled PCBs together. 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.

(5) Design Consideration

● PCB warpage after mounting the products onto a PCB can cause the package to break.

The LED should be placed in a way to minimize the stress on the LEDs due to PCB bow and twist.

● The position and orientation of the LEDs affect how much mechanical stress is exerted on the LEDs placed near the score lines.

The LED should be placed in a way to minimize the stress on the LEDs due to board flexing.

● Board separation must be performed using special jigs, not using hands.