3990A3

3990A3 Application Field and Working Principle

3990A3 is a self-illuminated LED series from Eaton Cutler-Hammer and it is suitable for a wide range of panel indicators and pilot lights. This series offers visual indication for almost any kind of residential, commercial, or industrial application, and it provides very wide compatibility with standard symbol designs and panel cutouts. It also provides an ideal solution for on/off operation and active indicators.

Product Range

The key features of 3990A3 Series include: wide range of operating voltages, mounting brackets and panels for panels up to 0.1705” (4.3mm) thick, specially designed face plates, patented bright LEDs, and a wide variety of colors. It also features additional options such as red/yellow keypad illumination, colored wires, and surface mount screws. Some models feature protective shields, and a low profile case. This series is available from 30 to 240VAC.

Working Principle

3990A3 LED indicators use a special light emitting diode (LED) to produce light. The LED is composed of a semiconductor material that emits light when it is energized. The current in the circuit is applied to the LED and creates what is known as a forward bias, and this creates a potential across the diode. When the current is applied, it causes the electrons to be accelerated and thus release energy in the form of light.

This light can be seen when it is directed towards the face of the panel indicator. The light is then filtered and the colour of the LED can be changed to different shades by controlling the current through the LED. The colour and intensity of the light can be adjusted depending on the current running through the LED. This makes 3990A3 ideal for applications that require different levels of brightness.

When the LED is not in use, the current is typically reduced to zero, thus the LED is not visible. This feature makes them ideal for applications that require short or intermittent periods of illumination. They are also extremely reliable due to the solid state construction of the devices.

3990A3 can also be used for indicating on or off positions in some applications. A light emitting diode is typically used instead of a mechanical switch for indicating on or off. In this case, the light is either on or off, and this is indicated by the presence or absence of LED light.

Safety Features

Eaton 3990A3 also features safety features such as temperature sensors, reverse polarity protection and surge/load current limiting. These features ensure that the LED does not overheat due to high currents or dangerous situations.

Temperature sensors detect heat and when it reaches a certain level, the LED is automatically shut off. This prevents the LED from being damaged due to excessive heat. Reverse polarity protection prevents the LED from being damaged due to incorrect wiring. Surge/load current limiting protects the LED from short circuit situations, thus preventing it from being damaged.

Applications

3990A3 indicators are ideal for applications that require visual indication for a variety of reasons. They can be used in industrial applications such as machinery and electronic control systems in order to indicate the current status of a device or a system. They can also be used in residential applications such as indicating the status of lighting and security systems.

They can also be used for special purpose applications, such as an LED nightlight. The LED nightlight utilizes its low power consumption to provide a bright light for a long time, while reducing energy costs associated with the light.

In addition, 3990A3 LEDs are also ideal for applications that require visual indication of alarm systems, such as fire alarms. LEDs are highly reliable and can be used for long periods of time without any problems. They also provide a high degree of accuracy and reliability, making them ideal for alarm systems.

Conclusion

Overall, 3990A3 is a reliable series of LEDs for panel indicators and pilot lights. It offers a wide variety of features such as low profile case, broad range of colors and mounting brackets, as well as additional optional accessories. It also provides such features as temperature sensors, reverse polarity protection, and surge/load current limiting. As a result, it provides a great solution for a wide variety of applications.