NICHIA STS-DA1-4452B <Cat.No.171003>

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(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. The lead could also cause an

injury.

● 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.

● When handling the product with tweezers, always pick it up from the short side of the LED (the resin package body) and never

from the long side which has the leads. Failure to comply can cause wire-bond breaks and package damage, which will cause the

LEDs not to illuminate.

● 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.

(4) 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.

● Volatile organic compounds that have been released from materials present around the LEDs (e.g. housing, packing, adhesive,

secondary lens, lens cover, etc.) may penetrate LED lens and/or internal pre-coating resin. If the LEDs are being used in a

hermetically sealed environment, these volatile compounds can discolor after being exposed to heat and/or photon energy and

it may greatly reduce the LED light output and/or cause a color shift. In this case, ventilating the environment may improve the

reduction in light output and/or color shift. Perform a light-up test of the chosen application for optical evaluation to ensure that

there are no issues, especially if the LEDs are planned to be used in a hermetically sealed environment.