Introduction
In the realm of digital electronics, the 0.40 7 segment display is a standout, especially when it comes to clarity and efficiency. This article dives deep into the features, applications, and numerous benefits of the 0.40 inch 4-digit seven segment LED display, which is often integrated using the 4 digit 7 segment common cathode approach. For electronics manufacturers, engineers, purchasers, and administrators, understanding the capabilities and advantages of this display technology can significantly impact product development and user satisfaction.
Key Features of the 0.40 Inch 4-Digit Seven Segment LED Display
The 0.40 inch 4-digit seven segment LED display is celebrated for its compact size and high functionality. Key features include:
- Compact Design: Perfect for devices where space is at a premium but readability cannot be compromised.
- High Brightness and Clarity: Ensures that the displays are readable even in poor lighting conditions.
- Low Power Consumption: Ideal for battery-operated or energy-sensitive applications.
Versatile Applications
The versatility of the 0.40 7 segment display makes it an ideal choice for a wide range of applications:
- Consumer Electronics: Used in everything from digital clocks and timers to calculators.
- Industrial Control Systems: Helps in displaying readings like temperature, pressure, or speed in control panels.
- Medical Devices: Ensures clear readings in critical medical equipment such as ventilators and blood pressure monitors.
Benefits of Using the 0.40 Inch 4-Digit Displays
Adopting these LED displays brings several advantages:
- Enhanced Product Reliability: Their durability reduces the frequency of replacement.
- Energy Efficiency: They consume less power, contributing to greener product solutions.
- Cost-effectiveness: Longevity and low maintenance reduce the overall cost of the technology over its lifespan.
Case Studies Demonstrating Impact
Case Study 1: Consumer Electronics
A leading electronics manufacturer introduced the 0.40 inch 4-digit seven segment LED display into their new line of portable music players. The result was a 40% reduction in customer complaints related to display legibility under various lighting conditions.
Case Study 2: Industrial Applications
An industrial equipment producer incorporated these displays into their new series of digital pressure gauges, resulting in enhanced readability and a 30% improvement in user satisfaction during field operations.
User Testimonials
- Alex Johnson, Senior Engineer: “The 0.40 7 segment display has transformed our device interfaces, making them much easier to read and operate.”
- Maria Gonzalez, Product Purchaser: “These displays have not only improved the aesthetics of our products but have also contributed to a substantial decrease in after-sales service calls.”
Conclusion
The 0.40 inch 4-digit seven segment LED display is not just a component; it’s a pivotal element that enhances the functionality, reliability, and user experience of electronic devices. As technology advances, the role of efficient and effective displays like these will only grow, making them indispensable in both current and future electronic innovations.
Call to Action: Enhance your product designs with the reliable and efficient 0.40 inch 4-digit seven segment LED display. Contact our sales team today to learn more about integrating these displays into your next project!

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): 40.4x 16mm: 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-42B |
BL-Q40B-42B |
ultra Blue |
InGaN/SiC |
470 |
4.2 |
65 |
100 |
|
BL-Q40A-42D |
BL-Q40B-42D |
Super Red |
GaAlAs/DH |
660 |
2.2 |
75 |
115 |
|
BL-Q40A-42E |
BL-Q40B-42E |
Orange |
GaAsP/GaP |
635 |
2.5 |
80 |
115 |
|
BL-Q40A-42G |
BL-Q40B-42G |
Green |
GaP/GaP |
570 |
2.5 |
85 |
120 |
|
BL-Q40A-42H |
BL-Q40B-42H |
Red |
GaP/GaP |
700 |
2.6 |
8 |
10.5 |
|
BL-Q40A-42PG |
BL-Q40B-42PG |
Ultra Pure Green |
InGaN/SiC |
525 |
4.2 |
110 |
195 |
|
BL-Q40A-42S |
BL-Q40B-42S |
Hi Red |
GaAlAs/SH |
660 |
2.2 |
80 |
105 |
|
BL-Q40A-42UB |
BL-Q40B-42UB |
ultra Blue |
InGaN/SiC |
470 |
4.2 |
80 |
125 |
|
BL-Q40A-42UE |
BL-Q40B-42UE |
Ultra Orange |
AlGaInP |
630 |
2.5 |
86 |
140 |
|
BL-Q40A-42UG |
BL-Q40B-42UG |
Ultra Green |
AlGaInP |
574 |
2.5 |
96 |
140 |
|
BL-Q40A-42UR |
BL-Q40B-42UR |
Ultra Red |
GaAlAs/DDH |
660 |
2.2 |
105 |
160 |
|
BL-Q40A-42UY |
BL-Q40B-42UY |
Ultra Yellow |
AlGaInP |
590 |
2.5 |
85 |
135 |
|
BL-Q40A-42W |
BL-Q40B-42W |
Ultra White |
InGaN |
- |
4.2 |
160 |
||
BL-Q40A-42Y |
BL-Q40B-42Y |
Yellow |
GaAsP/GaP |
585 |
2.5 |
80 |
115 |