NSHU591A_13 Datasheet, PDF (13/15 Pages) NICHIA CORPORATION – SPECIFICATIONS FOR UV LED

CAUTIONS
NICHIA STS-DA1-2749C <Cat.No.131107>
(1) Lead Forming
● When forming leads, the leads should be bent at a point at lease 3mm from the base of the lead.
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 cap
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.
● Nichia LED leadframe are gold plated iron alloy. This gold surface may be affected by environments
which contain corrosive substances. Please avoid conditions which may cause the LED to corrode, tarnish or discolor.
This corrosion or discoloration may cause difficulty during soldering operation.
It is recommended that the LEDs be used as soon as possible.
● To avoid condensation, the products must not be stored in the areas where temperature and humidity fluctuate greatly.
● 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.
(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)
● 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.
● 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.
● This LED also emits visible light. Please take notice of visible light spectrum,
in case you use this LED as light source of sensors etc.
(4) 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.
● Dropping the product may cause damage.
● Do not stack assembled PCBs together. Failure to comply can cause the cap portion of the product to be cut, chipped,
delaminated and/or deformed. It may cause wire to break, leading to catastrophic failures.
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