QLA874B-4Y

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LEDs (Light Emitting Diodes) are common in everyday applications and can be used to indicate state or signal for a variety of purposes. LED Circuit Board indicators, Arrays, Light Bars, Bar graphs are just some of the applications that use LEDs. In this article, we will look at what the QLA874B-4Y is and the application field and working principle of it.

What is the QLA874B-4Y?

The QLA874B-4Y is a LED circuit board indicator that is designed to provide indication of a signal or state. The QLA874B-4Y is a single LED that is capable of providing a bright, clear indication to its users. The LED is encased in a high-performance plastic housing and is one of the most reliable and economical indicators available.

Application Field and Working Principle

The application field for the QLA874B-4Y is quite broad, ranging from 22 kHz communication interface, to optical encoders, to electronic control systems. The device itself is a very robust piece of equipment and is designed to operate in a wide range of temperatures, from -25C up to +85C. This makes it suitable for a wide range of applications. Furthermore, the device is designed to be extremely reliable, and has a built-in ESD (Electrostatic Discharge) protection.

The device itself consists of a central LED, which is enclosed in a plastic housing. The LED is connected to an internal circuit, which consists of an anode and a cathode. The anode of the LED is connected to the voltage supply, which is typically +5 volts. The cathode of the LED is then connected to a resistive load, which works to limit the current, thus allowing the LED to operate reliably. The device also has onboard protection against Electrostatic Discharge, as well as built-in protection against reverse-polarity damage.

In order to operate the device, all that is required is a +5V DC supply. Once the voltage is applied, the LED illuminates, providing a bright and clear indication of the signal or state. The QLA874B-4Y is perfect for applications where a reliable, economical and robust indication is required.

Conclusion

The QLA874B-4Y is a reliable and economical LED circuit board indicator. It has a wide operating temperature range and is capable of providing a bright and clear indication to its users. The device is also built with protection against Electrostatic Discharge and reverse-polarity damage. The device is perfect for applications where a reliable and robust indication is required.

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