Copyright © 2011-2019 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree
®
is a registered trademark and the Cree logo is a trademark of Cree, Inc.
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HIGH‑BRIGHTNESS LED SOLDERING & HANDLING
5. Electrostatic Discharge and Surge Current
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Electrostatic discharge (ESD) or electrical overstress (EOS) may damage LEDs.
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Precautions such as ESD wrist straps, ESD shoe straps or antistatic gloves must be worn whenever handling the LEDs.
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All devices, equipment and machinery must be properly grounded.
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It is recommended to perform electrical tests to screen out ESD failures at final inspection.
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It is important to eliminate the possibility of electrical overstress during circuitry design.
6. Heat Management
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Heat management of LEDs must be taken into consideration during the design stage of an LED application.
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High temperature may cause failure of the LEDs. The driving current should be de‑rated appropriately by referring to the de‑rating
curve included in each product specification.
7. Other Notes
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Make sure the reverse voltage will not exceed the absolute maximum rating.
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The power of high-brightness LEDs is very strong and may injure human eyes. Precautions must be taken such as avoiding looking
directly into lit LEDs.
SMD LEDS
1. Cleaning
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Don’t use unspecified chemical liquids to clean an SMD LED; the chemical could harm the SMD LED. When washing is necessary,
please wipe the LED with alcohol at normal room temperature and dry at normal room temperature for 15 minutes before use.
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The influence of ultrasonic cleaning on the SMD LED depends on factors such as ultrasonic power and the way the SMD LEDs are
mounted. Ultrasonic cleaning should be pre‑qualified to ensure this will not damage the SMD LEDs.
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Do not use alcohol and/or ultrasonic cleaning to clean UHD1110 series products.
2. Moisture‑Proof Packing
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To prevent moisture absorption into SMD LEDs during transportation and storage, the LEDs are packed in a moisture-barrier bag.
Desiccants and a humidity indicator are packed together with the LEDs as a secondary protection.
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A humidity-indicator card indicates the humidity level.
3. Storage
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Do not open the sealed bag before the products are ready to use.
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The shelf life of LEDs stored in the original sealed bag at ≤40 ºC and ≤90% RH is 12 months. Baking is required if the shelf life has
expired.