0.39 inch dual-digit alphanumeric led display | Green

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19.9 x 12.8 x 7


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Series No:BL-D39A-23
Specification Download:
19.9 × 12.8 × 7 mm
"Revolutionizing Digital Displays: The 0.39 Inch Dual-Digit Alphanumeric LED Display" Introduction In the dynamic world of digital display technology, the 0.39 inch dual-digit alphanumeric LED display has carved out a significant niche. Known for its versatility, this two-digit 7 segment display is a cornerstone in many electronic applications. This comprehensive article will cater to electronics manufacturers, engineers, purchasers, and administrators, focusing on the features, applications, and benefits of these displays, enriched by case studies and user testimonials. Features of 0.39 Inch Dual-Digit Alphanumeric LED Display The 0.39 inch dual-digit alphanumeric LED display, a type of 2 digit 7 segment display, stands out for its compact size and high functionality. It combines two alphanumeric characters, each made up of seven segments that can display numbers, letters, and some special characters. This versatility is enhanced by its high brightness, energy efficiency, and longevity, attributes inherent to LED technology. Applications Across Various Fields These dual 7 segment displays are ubiquitous in modern electronics. They are used in consumer electronics like digital clocks, calculators, and portable meters. In industrial settings, they serve as readouts for measurements and control systems. Their application extends to medical devices, where they provide clear, reliable data displays, and in public information systems like scoreboards and digital signage. Benefits of Using 0.39 Inch LED Displays The primary benefits of using a 0.39 inch dual-digit alphanumeric LED display include their compact design, allowing for more information to be displayed in a small space, and their energy efficiency, which translates to cost savings and environmental benefits. Their clarity and versatility make them ideal for various applications where clear and concise data display is critical. Case Studies: Demonstrating Impact In a case study involving a leading consumer electronics brand, the integration of these 0.39 inch displays into their latest line of handheld devices significantly enhanced user experience, owing to their clarity and compactness.
handheld devices
handheld devices
Another case from the automotive industry saw these displays being used in car dashboards, where their reliability and legibility improved the overall functionality and safety of the vehicles. User Testimonials The feedback from industry professionals highlights the effectiveness of these displays. An electronics engineer praised the versatility and ease of programming of the 0.39 inch displays, noting their significant role in enhancing product features. A procurement manager emphasized the cost-effectiveness and durability of these displays as key factors in their sourcing decisions. Conclusion and Call to Action The 0.39 inch dual-digit alphanumeric LED display represents a leap forward in digital display technology. For professionals in the electronics sector, utilizing these displays is a step towards cutting-edge innovation and efficiency. Explore the potential of these displays to elevate your products with advanced, compact, and energy-efficient solutions. Features:
  • Compact size: 0.39 inch digit height (10.0mm).
  • Dimensions: 19.9mm width x 12.8mm height.
  • Low-current operation for energy efficiency.
  • Common anode and common cathode options are available.
  • Excellent character appearance for clear visibility.
  • High light output for bright illumination.
  • RoHS compliant for environmentally friendly manufacturing.
  • Digital timers and counters.
  • Panel meters.
  • Small-scale measurement devices.
  • Industrial control panels.
  • Consumer electronics.
  • Voltage or temperature displays.
  • Portable measurement instruments.
  • Control panels in automotive applications.
  • Educational electronics projects.
  • General-purpose numeric displays
Dimension and Circuit Drawing:
Related Information


When soldering, leave a minimum of 2mm clearance from the base of the base of the lens to the soldering point. Dipping the lens into the solder must be avoided.

Do not apply any external stress to the lead frame during soldering while the LED is at high temperature.

Recommended soldering conditions:


IR Reflow Soldering (for SMD display)Wave SolderingSoldering Iron
Pre-Heat150-180°CPre-Heat100°C Max.Temperature300°C Max.
Pre-Heat Time120sec Max.Pre-Heat Time60sec Max.
Peak Temperature260°C Max.SolderWave260°C Max.Soldering Time3sec Max.(one time only)
Soldering Time10 sec Max.Soldering Time5sec Max.

Note: Excessive soldering temperature and/or time might result in deformation of the LED lens or failure of the LED

ESD(Electrostatic Discharge)

Static Electricity or power surge will damage the LED.

Suggestions to prevent ESD (Electrostatic Discharge):

n Use a conductive wrist band or anti-electrostatic glove when handling these LEDs

n All devices, equipment, and machinery must be properly grounded

n Work tables, storage racks, etc. should be properly grounded

n Use ion blower to neutralize the static charge which might have built up on surface of the LED’s

 plastic lens as a result of friction between LEDs during storage and handling

ESD-damaged LEDs will exhibit abnormal characteristics such as high reverse leakage current, 

low forward voltage, or “no light on” at low currents. To verify for ESD damage, check for “light on” 

and Vf of the suspect LEDs at low currents.

The Vf of “good” LEDs should be>2.0V@0.1mA for InGaN product and >1.4V@0.1mA for AlInGaP


antistatic notice-smd led

When selecting power for LED systems, it’s essential to understand several key parameters to ensure safe operation, longevity, and optimal performance. Here are some steps and considerations for LED power selection:

  • Determine the Forward Voltage (Vf) of the LED(s):

Each LED has a forward voltage, which is the voltage at which the LED operates when the current is flowing through it. This value can typically be found in the LED’s datasheet.

  • Determine the Forward Current (If) of the LED(s):

The forward current is the current at which the LED is designed to operate. Running an LED at higher than its rated current can reduce its lifespan and increase the heat it produces.

  • Decide on the Configuration:

Series Configuration: When LEDs are connected in series, the forward voltages add up, but the current remains the same.

Parallel Configuration: When LEDs are connected in parallel, the forward voltage remains the same, but the currents add up. This configuration can be risky because if one LED fails or has a slightly lower forward voltage, it can cause the other LEDs to draw more current.

Calculate Total Power Requirements:

Power (W) = Total Forward Voltage (V) x Total Forward Current (A)

For example, if you have three LEDs connected in series, each with a forward voltage of 3V and a forward current of 20mA, the total power requirement would be:

Power = (3V + 3V + 3V) x 20mA = 9V x 0.02A = 0.18W

  • Select an Appropriate Power Supply:
  • Voltage Rating: The power supply voltage should match or slightly exceed the total forward voltage of your LED configuration.
  • Current Rating: The power supply’s current rating should meet or exceed the total forward current of your LED configuration.
  • Safety Margin: It’s a good practice to select a power supply that can provide at least 20% more power than your calculated requirement. This ensures the power supply isn’t operating at its maximum capacity, which can extend its life and ensure safer operation.
  • Consider Additional Features:
  • Dimming Capability: If you want to control the brightness of your LEDs, choose a power supply with dimming capabilities.
  • Overcurrent and Overvoltage Protection: To protect your LEDs, select a power supply with built-in protection mechanisms.
  • Thermal Management: Ensure that the power supply has adequate cooling, especially if it will be enclosed or in a location with limited airflow.
  • Regulation and Efficiency:A power supply with good regulation will maintain a consistent voltage output despite variations in the load. High efficiency ensures minimal power is wasted as heat.
  • Physical Size and Form Factor:Depending on where you plan to place the power supply, its size and shape may be critical factors.

In summary, when selecting power for LED systems, understanding your LED’s requirements and the configuration you plan to use is essential. Then, pick a power supply that meets those needs with some added safety margin, keeping in mind any additional features or constraints relevant to your project.

Here are some well-regarded brands in the industry:

  • Mean Well: One of the most recognized brands in the LED power supply industry, Mean Well offers a wide range of products suitable for both indoor and outdoor applications. Their units often come with features like overcurrent protection, dimming capabilities, and high efficiency.
  • Tridonic: A global leader in lighting technology, Tridonic offers LED drivers and power supplies that cater to various lighting solutions, from simple setups to advanced smart lighting systems.
  • Philips Advance Xitanium: Philips is a well-known brand in the lighting industry, and their Xitanium series of LED drivers are known for reliability and performance. They cater to both indoor and outdoor LED applications.
  • Osram: Another giant in the lighting industry, Osram offers a range of LED drivers and power supplies suitable for various applications, including architectural and street lighting.
  • LIFUD: Specializing in LED drivers, LIFUD is known for its high-quality products that cater to both commercial and residential LED lighting solutions.
  • MOSO: This brand offers a variety of LED drivers, especially for outdoor and industrial applications. Their products are known for durability and performance.
  • TDK-Lambda: With a history in power electronics, TDK-Lambda offers a range of power supplies and LED drivers suitable for various applications, emphasizing reliability and advanced features.
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