
Introduction
The 0.40 inch 4-digit seven segment LED display is a cornerstone of modern electronic visualization technology, combining compactness with clarity for a variety of applications. Often referenced in technical resources like the 4 digit 7 segment display 12 pin datasheet, this display is a staple in electronic devices requiring precise and clear numeric readings. The flexibility and reliability of the 7 seg display make it an indispensable component for engineers and designers alike.
Comprehensive Features of the 0.40 Inch 4-Digit Seven Segment LED Display
The 0.40 inch 4-digit seven segment LED display offers distinctive features that set it apart:
- High Visibility: Each segment includes an LED, ensuring clear visibility even from different angles and in various light conditions.
- Compact Footprint: The small size of the display makes it ideal for applications where space is limited but information delivery is crucial.
- Multiplexing Capability: The 7 seg display can be multiplexed to show more information using fewer I/O ports, a feature detailed in the 4 digit seven segment display datasheet.
Applications Spanning Various Industries
Due to its versatility, the 7 seg display is used across multiple sectors:
- Consumer Electronics: In products like microwave ovens, digital clocks, and calculators.
- Automotive: For dashboard displays that provide readouts of time, temperature, and other critical vehicle statistics.
- Healthcare: In devices where precise data display is critical, such as blood glucose monitors and infusion pumps.
Benefits of Implementing 0.40 Inch 4-Digit Displays
The implementation of these displays offers several advantages:
- Energy Efficiency: LEDs are well-known for their low power consumption, which extends the battery life of portable devices.
- Ease of Integration: The availability of detailed datasheets, like the 4 digit 7 segment display 12 pin datasheet, simplifies the development process.
- Cost Effectiveness: Due to their longevity and low maintenance requirements, these displays provide a cost-effective solution for mass-produced electronics.
Case Studies Highlighting Effective Use
Case Study 1: Automotive Dashboard Displays
A major automotive manufacturer integrated the 0.40 inch 4-digit seven segment LED display into its new model dashboards, resulting in enhanced legibility of critical vehicle stats, which was positively received by customers for improving driving safety and comfort.
Case Study 2: Consumer Electronic Devices
A renowned manufacturer of household appliances incorporated the 7 seg display into their range of kitchen timers, significantly reducing user errors due to the display’s clear readability.
User Testimonials
- Elena Rodriguez, Electrical Engineer: “The detailed information from the 4 digit seven segment display datasheet made integration straightforward, enhancing our product’s user interface significantly.”
- Tom Chen, Product Manager: “Opting for the 0.40 inch display was a game-changer for our digital devices, improving both aesthetic and functional aspects.”
Conclusion
The 0.40 inch 4-digit seven segment LED display stands out as an essential component for modern electronic devices, offering unmatched clarity and flexibility. Its application in various industries underscores its utility and efficiency, making it a preferred choice for designers and engineers.
Call to Action: Elevate your electronic projects with the high-quality and versatile 0.40 inch 4-digit seven segment LED display. Contact us today to explore how these displays can enhance your product offerings!

Features
- 0.40-Inch Digit Height (10.16mm): Provides clear visibility for numeric displays, ideal for applications requiring small, easily readable digits.
- Dimensions (Width x Height): 39.5x 18mm: Its compact size makes it suitable for various applications where space efficiency is important.
- Low Current Operation: Energy-efficient, making it suitable for both battery-powered and low-power electronic devices.
- Common Anode and Cathode Options: Offers flexibility in circuit design, accommodating different electrical configurations.
- Excellent Character Appearance: Ensures digits are displayed clearly and legibly, enhancing readability.
- High Light Output: Bright enough for easy reading under various lighting conditions.
- Easy Mounting on PC Boards or Sockets: Designed for straightforward installation, facilitating efficient integration into electronic systems.
- IC Compatible: Can be integrated with integrated circuits, making it suitable for complex electronic designs.
- Multicolor Availability: Provides options for different colors, adding versatility in design and functional use.
- Categorized for Luminous Intensity: Ensures consistent brightness levels across units, important for uniform display quality.
- Technically Rugged: Durable and reliable, capable of withstanding various operational environments.
- Standard Design: Gray Surface, White Segment: Provides a classic look with high contrast for ease of reading.
- RoHS Compliance: Meets environmental standards, adhering to regulations that restrict hazardous substances.
Applications
- Industrial Control Panels: Suitable for use in industrial environments where clear, multi-digit numeric displays are necessary for monitoring and control.
- Public Information Displays: Ideal for transportation stations, public squares, or event venues where clear, multi-digit displays are needed.
- Consumer Electronics: Appropriate for household appliances and entertainment systems requiring multiple numeric displays.
- Telecommunication Equipment: Can be used in networking devices for displaying numerical information like channel numbers or signal strength.
- Retail and Point of Sale Systems: Effective in displaying prices, quantities, or codes in retail environments.
- Healthcare Equipment: Useful in medical devices for showing various numerical data such as patient vitals or timer settings.
- Automotive Displays: Suitable for vehicle dashboards to display information like temperature, speed, or fuel levels.
- Fitness Equipment: Ideal for gym machines, showing workout data such as time, speed, or calorie count.
- Educational Tools: Used in educational settings for timers or displaying experiment data.
- Safety and Emergency Equipment: Suitable for safety systems displaying critical numerical information.
Part No. (Cathode) | Part No. (Anode) | Emitting Color | Material | Peak Wavelength (nm) | Voltage typ.(v) | Voltage max. (v) | Luminous min | Luminous typ |
---|---|---|---|---|---|---|---|---|
BL-Q40A-43B |
BL-Q40B-43B |
ultra Blue |
InGaN/SiC |
470 |
4.2 |
65 |
100 |
|
BL-Q40A-43D |
BL-Q40B-43D |
Super Red |
GaAlAs/DH |
660 |
2.2 |
75 |
115 |
|
BL-Q40A-43E |
BL-Q40B-43E |
Orange |
GaAsP/GaP |
635 |
2.5 |
80 |
115 |
|
BL-Q40A-43G |
BL-Q40B-43G |
Green |
GaP/GaP |
570 |
2.5 |
85 |
120 |
|
BL-Q40A-43H |
BL-Q40B-43H |
Red |
GaP/GaP |
700 |
2.6 |
8 |
10.5 |
|
BL-Q40A-43PG |
BL-Q40B-43PG |
Ultra Pure Green |
InGaN/SiC |
525 |
4.2 |
110 |
195 |
|
BL-Q40A-43S |
BL-Q40B-43S |
Hi Red |
GaAlAs/SH |
660 |
2.2 |
80 |
105 |
|
BL-Q40A-43UB |
BL-Q40B-43UB |
ultra Blue |
InGaN/SiC |
470 |
4.2 |
80 |
125 |
|
BL-Q40A-43UE |
BL-Q40B-43UE |
Ultra Orange |
AlGaInP |
630 |
2.5 |
96 |
140 |
|
BL-Q40A-43UG |
BL-Q40B-43UG |
Ultra Green |
AlGaInP |
574 |
2.5 |
96 |
140 |
|
BL-Q40A-43UR |
BL-Q40B-43UR |
Ultra Red |
GaAlAs/DDH |
660 |
2.2 |
105 |
160 |
|
BL-Q40A-43UY |
BL-Q40B-43UY |
Ultra Yellow |
AlGaInP |
590 |
2.5 |
85 |
135 |
|
BL-Q40A-43W |
BL-Q40B-43W |
Ultra White |
InGaN |
- |
4.2 |
160 |
||
BL-Q40A-43Y |
BL-Q40B-43Y |
Yellow |
GaAsP/GaP |
585 |
2.5 |
80 |
115 |