-6-

Nichia

STSE-CW7111A

<Cat.No.070626>

(5) Heat Generation

· Thermal design of the end product is of paramount importance.

Please consider the heat generation

of the LED when making the system design.

The coefficient of temperature increase per input

electric power is affected by the thermal resistance of the circuit board and density of LED placement

on the board, as well as other components.

It is necessary to avoid intense heat generation and operate

within the maximum ratings given in this specification.

· Please determine the operating current with consideration of the ambient temperature local to the LED

and refer to the plot of Ambient temperature vs. Allowable Forward Current on CHARACTERISTICS

in this specifications.

Please also take measures to remove heat from the area near the LED to improve

the operational characteristics of the LED.

· The equation 1 indicates correlation between Tj and Ta, and the equation 2 indicates correlation

between Tj and Ts.

Tj=Ta + Rja W

1

Tj=Ts + Rjs W

2

Tj = Dice Temperature : °C,

Ta = Ambient Temperature : °C,

Ts = Solder Temperature (Cathode Side) : °C,

Rja = Heat resistance from Dice to Ambient temperature : °C /W,

Rjs = Heat resistance from Dice to Ts measuring point ≒ 60°C /W,

(6) Safety Guideline for Human Eyes

· In 1993, the International Electric Committee (IEC) issued a standard concerning laser product safety

(IEC 825-1). Since then, this standard has been applied for diffused light sources (LEDs) as well

as lasers.

In 1998 IEC 60825-1 Edition 1.1 evaluated the magnitude of the light source.

In 2001 IEC 60825-1 Amendment 2 converted the laser class into 7 classes for end products.

Components are excluded from this system.

Products which contain visible LEDs are now classified

as class 1. Products containing UV LEDs are class 1M. Products containing LEDs can be classified

as class 2 in cases where viewing angles are narrow, optical manipulation intensifies the light, and/or the

energy emitted is high.

For these systems it is recommended to avoid long term exposure.

It is also recommended to follow the IEC regulations regarding safety and labeling of products.

(7) Others

· NGPLR70AS complies with RoHS Directive.

· Flashing lights have been known to cause discomfort in people; you can prevent this by taking

precautions during use.

Also, people should be cautious when using equipment that has had LEDs

incorporated into it.

· The 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).

· User shall not reverse engineer by disassembling or analysis of the LEDs without having prior written

consent from Nichia.

When defective LEDs are found, the User shall inform Nichia directly before

disassembling or analysis.

· The formal specifications must be exchanged and signed by both parties before large volume purchase begins.

· The appearance and specifications of the product may be modified for improvement without notice.