NSSW440TVR Datasheet, PDF (5/11 Pages) List of Unclassifed Manufacturers – SPECIFICATIONS FOR NICHIA CHIP TYPE WHITE LED

Nichia STCE-CS0010B
<Cat.No.010307>
(4) Heat Generation
ŋ Heat generation must be taken into design consideration when using the LEDs.
The coefficient of temperature increase per input electric power is about 0.5ˆ/mW at the LED’s active
layer. This coefficient will be affected by the heat resistance of the circuit board and by dense mounting
of the LEDs. At the same time, precautions must be taken into the design of circuitry to avoid
intense heat generation. Proper designs which allow radiation of heat, etc. may be needed.
ŋ The operating current should be decided after considering the ambient maximum temperature when
the LEDs are illuminating.
(5) Static Electricity
ŋ Static Electricity and surge damages the LEDs.
It is recommended to use a wrist band or anti-electrostatic glove when handling the LEDs.
ŋ All devices, equipment and machinery must be properly grounded.
ŋ When inspecting own final products on which LEDs were mounted, it is recommended to check also
whether the mounted LEDs are damaged by static electricity or not. It is easy to find static-damaged
LEDs by light emission test at lower current (below 1mA is recommended). Damaged LEDs will
show some unusual characteristics such as leak current remarkably increases, starting forward voltage
becomes lower, or the LEDs get unlighted at the low current.
(6) Others
ŋ Care must be taken to ensure that the reverse voltage will not exceed the absolute maximum rating
when using the LEDs with matrix drive.
ŋ The electrode sections are plated with silver. Those will become discolored by contact with
corroded gas etc. Precautions must be taken to maintain a clean storing atmosphere.
ŋ The LED light output is strong enough to injure human eyes. Precautions must be taken to prevent
looking directly at the LEDs with unaided eyes for more than a few seconds. ç
ŋ These LEDs described in this brochure are intended to be used for ordinary electronic equipment (such
as office equipment, communications equipment, measurement instruments and household appliances).
Consult Nichia’s sales staff in advance for information on the applications in which exceptional quality
and reliability are required, particularly when the failure or malfunction of the LEDs may directly
jeopardize life or health (such as for airplanes, aerospace, submersible repeaters, nuclear reactor
control systems, automobiles, traffic control equipment, life support systems and safety devices).
ŋ User shall not reverse engineer by disassembling or analysis of the LEDs without having the prior written
consent of Nichia. When defective LEDs are found, User shall inform to Nichia directly before
disassembling or analysis.
ŋ The formal specifications must be exchanged and signed by both parties before large volume purchase begins.
ŋ The appearance and specifications of the product may be modified for improvement without notice.
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