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10. Precautions in Handling & Use
1) For over-current-proof function, customers are recommended to apply resistors to prevent sudden change of the current
caused by slight shift of the voltage.
2) This device should not be used in any type of fluid such as water, oil, organic solvent, etc. When washing is required, IPA
is recommended to use.
3) When the LEDs illuminate, operating current should be decided after considering the ambient maximum temperature.
4) LEDs must be stored in a clean environment. If the LEDs are to be stored for three months or more after being shipped
from Samsung, they should be packed by a sealed container with nitrogen gas injected (shelf life of sealed bags: 12
months, temperature ~40 ºC, ~90 % RH).
5) After storage bag is opened, device subjected to soldering, solder reflow, or other high temperature processes must be:
a. Mounted within 672 hours (28 days) at an assembly line with a condition of no more than 30 ºC / 60 % RH, or
b. Stored at <10 % RH
6) Repack unused products with anti-moisture packing, fold to close any opening and then store in a dry place.
7) Devices require baking before mounting, if humidity card reading is >60 % at 23 ± 5 ºC.
8) Devices must be baked for 1 hour at 60 ± 5 ºC, if baking is required.
9) The LEDs are sensitive to the static electricity and surge. It is recommended to use a wrist band or anti-electrostatic
glove when handling the LEDs. If voltage exceeding the absolute maximum rating is applied to LEDs, it may cause
damage or even destruction to LED devices. Damaged LEDs may show some unusual characteristics such as increase
in leak current, lowered turn-on voltage, or abnormal lighting of LEDs at low current.
10) VoCs (Volatile Organic Compounds) can be generated from adhesives, flux, hardener or organic additives used in
luminaires (fixtures). LED silicone encapsulant is permeable to those chemicals and they may lead to a discoloration of
encapsulant when they exposed to heat or light. This phenomenon can cause a significant loss of light emitted (output)
from the luminaires. In order to prevent these problems, we recommend users to know the physical properties of
materials used in luminaires and they must be carefully selected.
11) Risk of sulfurization (or tarnishing)
The LED from Samsung does not use a silver-plated lead frame but if the LED is attached in silver-plated substrate, the
surface color of substrate may change to black (or dark colored) when it is exposed to sulfur (S), chlorine (Cl) or other
halogen compound. Sulfurization of substrate may cause intensity degradation, change of chromaticity coordinates and,
in extreme cases, open circuit, It requires caution. Due to possible sulfurization of substrate, LED should not be used and
stored together with oxidizing substances made of materials such as rubber, plain paper, lead solder cream, etc.