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Basic Design


All LEDs and Photodetectors are designed to operate without failure in recommended usage conditions. However, all semiconductor components are prone to unexpected malfunctions and failures. Please take the necessary precautions to prevent fire, injury and other damage should any malfunction or failure arise.

With regard to Absolute Maximum Rating

Absolute Maximum Ratings are set to prevent LEDs and Photodetectors from failing due to excess stress (temperature, current, voltage, etc.). Usage conditions must never exceed the ratings, nor should any two of the factors reach the rating level simultaneously.

Actual Usage Design

  • 1.

    In order to ensure high reliability from LEDs and Photodetectors, variable factors that arise in actual usage conditions should be taken into account for designing. (Derating of TYP., MAX Forward Voltage, etc.)

  • 2.

    Please insert straight protective resistors into the circuit in order to stabilize LED operation and also to prevent the device from igniting due to excess current. Please contact Stanley for information on using the LED product in a matrix circuit.

  • 3.

    If multiple LED products are used in the same application, LEDs can be sorted by luminous intensity and color tones to reduce variance. Please contact Stanley for more information on specific sorting.

  • 4.

    Please contact Stanley for more information when using a low-voltage trigger under 2mA.

  • 5.

    The visual LED devices are designed on the assumption for display. They might be unsuitable by the function usages except display, so we do not recommended using. Please consult us beforehand if they are used by the function usage (source of light for the sensor and the communication, etc.).

  • 6.

    Please put in the series resistance of each line for the difference decrease when two or more LEDs are used by the parallel circuit.


Some products contain Arsenic compounds such as GaAs and GaAIAs in the die, however the products are designed to prevent any leakage of these materials under normal conditions, even if they should be released into a natural environment. However, when disposing of the products, please commission a specialist holding an industrial waste disposal license in accordance to your local waste product disposal and cleaning law.

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