3HDL-S

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LED indication is an important component for providing visual alerts for multiple applications. Discrete LED indicators are small component devices that come in a variety of formats and are used to indicate presence, level, or quantity of a desired entity. 3HDL-S is one of the most popular LED indication solutions among various discrete LED technologies, and provides a wide range of applications and great reliability. Here we will discuss the application field and working principle of 3HDL-S.

Application Field and Construction of 3HDL-S

3HDL-S LEDs, also known as “multicolor” LEDs, consist of two LEDs of different colors (usually red and green) and a single resistor; all three elements are housed inside the same case. 3HDL-S LEDs have a wide range of application in the rapidly expanding area of LED indication. They are widely used for on/off indication, power/signal indication and supply/error indication in various industries. Due to their small size, 3HDL-S LEDs are also suitable for space-constrained applications.

The resistor integrated with the 3HDL-S LED is selected to create the correct operating current for each LED, so the single resistor could shorten the installation and assembly procedure and reduce cost. The 3HDL-S package provides five times higher life expectancy and thirty times better vibration performance compared to the two-LEDs-with-separate-resistors structured device.

Working Principle of 3HDL-S

The working principle of the 3HDL-S is based on its dual-LED construction. The dual-LED construction enables 3HDL-S to emit different colors of light when the current is increased or decreased. When the current passing through one LED is decreased, but simultaneously increased in another one, the light emitted from the LEDs mixes and appears to have a particular color. This works in a similar way to mixing colored paints to obtain the desired shade - but in this case, it happens with light.

The resistor integrated into the 3HDL-S is designed to fix the sum of the operating currents for the two LEDs, which optimizes the optical output, power consumption and life time for the different applications. The adjustable resistor could also be replaced with fixed one, by changing the setting, so the 3HDL-S over all performance is improved.

Conclusion

3HDL-S is a great solution for LED indication, and is widely used in industrial applications. It offers great reliability, space-saving, and cost-effective solutions. Its application field is increasing with the development of LED indication technology, and its principle is based on dual-LED construction, which includes a single resistor that could adjust the current of the two LEDs at the same time. The resistor serves to optimize the overall performance, power consumption and lifetime of the 3HDL-S LED.

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