SML522BUWT86 Optoelectronics

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LEDs are a common form of discrete indication frequently used in industrial, consumer, medical, and automotive applications. The SML522BUWT86 is a surface-mount yellow LED created by Vishay Semiconductor GmbH, a leading manufacturer of optoelectronic components. This LED is designed for low power operation with a maximum forward current of 20 mA and a voltage drop of 2.2V. This article will discuss the application field and working principle of the SML522BUWT86.

Application Field

The SML522BUWT86 is a surface-mount yellow LED primarily used for discrete indication in consumer and automotive applications. This LED is optimised for low power consumption and features a wide viewing angle of 140°, allowing for clear and consistent visibility in both portable and automotive applications. This visibility is further enhanced by the LED’s 3.1 mm x 3.2 mm SMD package.

The SML522BUWT86 is ideal for use in signal and actuation sequences due to its low forward voltage drop of 2.2V. This allows it to be used in 12V systems without the need for a series resistor. Furthermore, its wide viewing angle of 140° enables its consistent visibility from a variety of angles, which is beneficial for applications such as backlighting and signal indication.

The SML522BUWT86 is RoHS compliant, making it a suitable choice for applications where environmental safety and sustainability are a priority. The LED is certified to be free of hazardous substances, making it a safer choice for customers and manufacturers alike.

Working Principle

The working principle of the SML522BUWT86 is very simple. This LED has a single diode composition, which is what produces the light emission. The diode is constructed from a thin layer of Gallium Phosphide and other materials, which is responsible for the LED’s yellow color. When a current is applied to the LED’s anode (positive) and cathode (negative) contacts, electrons move from the anode to the cathode, creating light as they pass through the diode’s layer of Gallium Phosphide.

The intensity of the light output is dependent on the current passing through the LED. For typical operation, the SML522BUWT86 should not be driven with a current greater than 20 mA due to the LED’s low power rating. Higher currents may damage the LED and reduce its lifespan. Additionally, a current rating lower than 0.02 mA is required to achieve a fully lit LED.

The SML522BUWT86 is also designed to be highly temperature resistant, with a maximum forward voltage rating of 2.2V even at temperatures as high as 105°C. This ensures that the LED performs reliably in high temperatures, enabling its use in a variety of application fields. Additionally, the LED has a maximum reverse voltage rating of 5V, which makes it an ideal choice for reverse polarity applications.

Conclusion

In conclusion, the SML522BUWT86 is an SMD yellow LED intended for use in a variety of industrial and automotive applications. This LED is characterised by its low power consumption and wide viewing angle, making it suitable for use in 12V systems without the need for a series resistor. Additionally, its single diode construction allows for simple and reliable operation.

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