0.30 inch dual-digit seven segment led display | ultra Blue

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Series No:BL-D30I-21
Specification Download:
15.5 × 15 × 7.2 mm
0.30 inch double numeric LED display Illuminating Innovation: The 0.30 Inch Dual-Digit Seven Segment LED Display In the world of digital displays, the 0.30 inch dual-digit seven segment LED display emerges as a beacon of technological advancement. Commonly referred to as the "7 seven segment display," this compact yet powerful component has redefined the standards for clarity and efficiency in digital readouts. With synonyms like "7 segment display 2" making its versatility and utility clear, this article aims to provide a detailed exploration of its features, applications, benefits, along with insightful case studies and user testimonials. Tailored for electronics manufacturer engineers, purchasers, and administrators, we delve into how this innovative display technology enhances various electronic devices, offering a professional insight into its widespread adoption and user satisfaction. Introduction At the forefront of display technology, the 7 seven segment display, particularly in its dual-digit form, stands out for its ability to convey numerical information with unprecedented clarity and precision. Designed to fit a broad spectrum of applications, from consumer electronics to sophisticated industrial equipment, its significance cannot be overstated. This exploration begins with an in-depth look at the unique attributes and wide-ranging applications of this remarkable display technology. Core Features and Applications The 0.30 inch display is celebrated for its compact design, high visibility, and energy efficiency. These attributes make it an ideal choice for applications requiring precise numerical displays in a small footprint. Whether integrated into digital clocks, calculators, or complex measuring instruments, the "two 7 segment display" offers unparalleled reliability and ease of use. Unveiling the Benefits Opting for a 0.30 inch dual-digit seven segment LED display brings myriad benefits. Its low power consumption ensures prolonged operation in battery-powered devices, while its durability and easy programmability streamline the development process, allowing for enhanced product designs and quicker market entry. Real-World Success: Case Studies and Testimonials Through case studies, the transformative impact of the "2 digit led number display" becomes evident. For instance, its implementation in portable medical devices has not only improved the readability of critical health data but also contributed to compact and user-friendly designs. User testimonials reinforce this positive feedback, with many highlighting the display's role in boosting product appeal and functionality. Conclusion: Leading the Charge in Display Technology The exploration of the 0.30 inch dual-digit seven segment LED display underlines its pivotal role in the evolution of digital displays. By marrying efficiency with versatility, it stands as a cornerstone in the development of innovative electronic devices. As technology marches forward, the seven segment display is set to remain at the heart of electronic display innovation, continuing to light up the path for future advancements. Step Forward with Advanced Display Technology Embrace the future by integrating the 0.30 inch dual-digit seven segment LED display into your next project. Experience the difference in precision, efficiency, and design flexibility, and lead the way in digital display technology.
0.30 inch dual-digit seven segment led display
0.30 inch dual-digit seven segment led display


  • 0.30 Inch Digit Height (7.62mm): Provides clear and visible numeric displays, ideal for applications where compactness is crucial.
  • Compact Dimensions: Measuring 15.50 x 15.00 mm, this display is well-suited for small-scale applications.
  • Low Current Operation: Energy-efficient, reducing power consumption, beneficial in battery-operated or power-sensitive devices.
  • Common Anode and Common Cathode Availability: Offers flexibility in circuit design, accommodating a variety of electronic configurations.
  • Excellent Character Appearance: Ensures sharp and clear numeric displays for ease of readability.
  • High Light Output: Bright display ensures visibility under various lighting conditions.
  • Easy Mounting on PC Boards or Sockets: Designed for straightforward integration onto printed circuit boards or into sockets, easing the assembly process.
  • IC Compatible: Can be easily interfaced with various integrated circuits, making it suitable for complex electronic systems.
  • Multicolor Availability: Available in different colors, providing options for customization and various design needs.
  • Categorized for Luminous Intensity: Ensures uniform brightness across units for consistent performance.
  • Technically Rugged: Durable and reliable, built to withstand various operational conditions and environments.
  • Standard Design: Features a gray surface with white segments, offering a classic and clear display appearance.
  • RoHS Compliance: Manufactured in compliance with environmental and health safety standards.


  • Digital Clocks and Timers: Ideal for timekeeping devices in compact spaces like electronic gadgets, small appliances, and handheld devices.
  • Electronic Scoreboards: Suitable for small sports equipment or game devices where space is limited.
  • Industrial Equipment: Used in small machinery and equipment for displaying measurements, counts, or operational data.
  • Consumer Electronics: Incorporated in compact household appliances, like small kitchen timers, digital thermometers, or portable music players.
  • Medical Devices: Employed in small medical equipment for showing readings and numerical data.
  • Automotive Displays: Applicable for small information displays in vehicles, such as dashboard indicators or accessory displays.
  • Control Panels: Used in small control panels for machinery or electronic devices, providing clear numeric readouts.
  • Telecommunication Equipment: Suitable for network devices, small communication equipment, or wearables for displaying numeric information.
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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