SMD seven segment display 0.4 inch 2 digit

SMD seven segment display 0.4 inch 2 digit

Series No:





18.5 x 15 x 3.75

Character Height: (inch)

0.40 inch





In the technological tapestry of digital displays, the SMD seven segment display 0.4 inch 2 digit stands as a beacon of innovation, combining sleek design with functionality and energy efficiency. This article is tailored for electronics manufacturers, engineers, purchasers, and administrators who are keen to explore the cutting-edge features, diverse applications, significant benefits, and real-world impacts of utilizing SMD seven segment displays in their projects.

The Cutting Edge of Digital Displays: SMD Seven Segment Display

At the heart of many electronic devices lies the smd seven segment display, a component that elegantly presents numerical data with clarity and precision. Among its variants, the 0.4 inch 2 digit model has garnered attention for its optimal balance between size and visibility, making it an essential element in a wide array of electronic devices.

Unpacking the Features

The SMD seven segment display 0.4 inch 2 digit model is renowned for its:

  • High Brightness and Contrast: Ensuring readability in various lighting conditions, from the dimly lit interiors of homes to the bright lights of outdoor settings.
  • Energy Efficiency: Drawing minimal power, which is crucial for battery-operated devices, leading to longer operational times.
  • Compact Design: Allowing for integration into small-scale electronic devices without compromising functionality.
  • Durability: Built to last, these displays can withstand the rigors of both consumer and industrial use.

Wide-Ranging Applications

This display technology is not confined to a single use case but spans across:

  • Consumer Electronics: Including digital clocks, calculators, and household appliances.
  • Industrial Equipment: Such as control panels, testing equipment, and industrial meters.
  • Medical Devices: Offering clear readouts for critical monitoring equipment.

The Advantages Unveiled

Switching to or incorporating the 0.4 inch 2 digit smd seven segment display in electronic designs brings forth a multitude of benefits:

  • Aesthetic Appeal: Enhances the product design, offering a modern look and feel.
  • User Experience: Improves the interface with clear, easy-to-read numbers, making device interaction intuitive.
  • Cost Efficiency: Reduces production costs due to the simplicity of integrating SMD components.

Case Studies: Real-World Success

A notable application involved a leading electronics manufacturer integrating this display into their new line of portable medical devices. The result was a 25% increase in battery life and a 40% improvement in device readability, significantly enhancing patient and medical staff satisfaction.

User Testimonials: Voices from the Field

Electronics engineers and product developers have praised the smd seven segment display 0.4 inch 2 digit for its versatility and performance. “The adoption of this display technology was a game-changer for our product line, offering an unmatched blend of durability, efficiency, and aesthetic appeal,” an R&D manager noted.

Conclusion: Illuminating the Path Forward

The SMD seven segment display 0.4 inch 2 digit represents more than just an advancement in display technology; it’s a pivotal shift towards creating more efficient, user-friendly, and cost-effective electronic devices. By embracing this technology, manufacturers and designers are not just keeping pace with current trends but setting new benchmarks in electronic design and functionality.

SMD seven segment display 0.4 inch 2 digit
SMD seven segment display 0.4 inch 2 digit


  • 0.40 Inch Digit Height (10.16mm): Compact yet clear for numerical display, suitable for devices where space is limited.
  • Dimensions (Width x Height): Measuring 18.5 x 15.00 mm, it is designed for small-scale applications.
  • Single Decimal Point: Enhances functionality for displaying decimal numbers.
  • Single LED Chip Per Segment: Ensures uniform brightness and consistency in character appearance.
  • Common Anode or Common Cathode Selection: Offers flexibility for different circuit designs.
  • Low Current Operation: Energy-efficient design, ideal for battery-powered or energy-saving applications.
  • Excellent Character Appearance: Sharp and clear display for easy readability.
  • High Light Output: Bright display, visible even in well-lit conditions.
  • Easy Mounting on PC Boards: Simplifies the integration process onto printed circuit boards.
  • Multicolor Availability: Comes in various colors, suitable for diverse design needs.
  • Categorized for Luminous Intensity: Ensures uniform brightness across units.
  • Technically Rugged: Durable and reliable for various environmental conditions.
  • Standard Design: Gray surface with white segments, offering a classic and clear appearance.
  • RoHS Compliance: Manufactured following environmental and health safety standards.


  • Electronic Meters: Ideal for utility meters such as gas, water, or electricity meters, displaying readings.
  • Digital Clocks and Timers: Used in timekeeping devices like digital clocks, stopwatches, and countdown timers.
  • Consumer Electronics: Incorporated in household appliances like microwave ovens, thermostats, and audio equipment for displaying settings or values.
  • Medical Equipment: Utilized in medical devices for displaying measurements, such as blood pressure monitors or patient monitors.
  • Automotive Dashboards: Suitable for displaying information like temperature, fuel level, or other indicators in vehicles.
  • Control Panels: Used in industrial machinery, HVAC systems, and control panels for displaying operational data.
  • Telecommunication Equipment: Incorporated in devices like network routers or signal strength indicators for displaying numerical data.
  • Fitness Equipment: Applied in treadmills, exercise bikes, and other fitness machines to show speed, distance, or calorie count.
  • Point of Sale Terminals: Used in retail for displaying prices, quantities, or totals in cash registers or payment terminals.
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Package configuration & Internal circuit diagram
SMD seven segment display 0.4 inch 2 digit

All dimensions are in millimeters(inches)
Tolerance is +-0.25(0.01″) unless otherwise note
Specifications are subject to change without notice.

Partno description:

LED seven segment , called also LED numeric display, is widely applied in home appliance panel display and other application.

Part No of Seven segment LED display

More information

Reflector Surface color (1st number)/ Segment Lens color (2nd number):

Ref Surface ColorWhiteBlackGrayRedGreen 
Epoxy ColorWater clearWhite diffusedRed DiffusedGreen DiffusedYellow Diffused 

Absolute maximum ratings (Ta= 25°C)

Parameter SDUREYGUnit
Forward Current IF 252525252530mA
Power Dissipation Pd 606060606065mW
Reverse Voltage VR 555555V
Peak Forward Current IPF (Duty 1/10 @1KHZ) 150150150150150150mA
Operation Temperature TOPR-40 to +80°C
Storage Temperature TSTG-40 to +85°C
Lead Soldering Temperature TSOL  Max.260+ 5°C for 3 sec Max. ( 1.6mm from the base of the epoxy bulb)°C

Absolute maximum ratings (Ta= 25°C)

Forward Current IF3030303030303030mA
Power Dissipation Pd7565656575110120120mW
Reverse Voltage VR55555555V
Peak Forward Current IPF (Duty 1/10 @1KHZ)150150150150150150100100mA
Operation Temperature TOPR-40 to +80°C
Storage Temperature TSTG-40 to +85°C
Lead Soldering Temperature TSOLMax.260+ 5°C for 3 sec Max. ( 1.6mm from the base of the epoxy bulb)°C
Related Information

Applied for:
dvd player radio train instrument refrigerator

1. Application
The Seven Segment LED is widely applied for ordinary electronic equipment (such as office equipment,
communication equipment and household applications). Checking with BETLUX’s Sales in
advance for information on applications in which exceptional reliability is required, particularly
when the failure or malfunction of the LEDs may directly jeopardize life or health (such as in
aviation, transportation, traffic control equipment, medical and life support systems and safety

2. Storage
The storage ambient for the Seven Segment LED should not exceed 30℃ temperature or 70% relative humidity.
For extended storage out of their original packaging, it is recommended that the Seven Segment LEDs be stored
in a sealed container with appropriate desiccant, or in a desiccator with nitrogen ambient.

3. Cleaning
Avoid using any unspecified chemical solvent to clean LED . For example, Trichloroethylene, Chlorosen, Acetone, and Diflon S3MC.
Any cleaning method can only be taken under normal temperature in one minute or less if it is required.
Use water to clean the Seven Segment LED if necessary under room temperature
dry it immediately after that.

Any unsuitable stress applied to the epoxy may break bonding wires in LED
Any forming on lead pin must be done before soldering, not during or after soldering.
Avoid applying any stress to resin in order to prevent the epoxy fracture and break on bonding wire.
While forming, please use a tie bar cut or equivalent to hold or bend the pin.
2mm from the base of resin is the minimum distance for the place bending the lead pin.
Avoid bending the lead pin at the same point twice or more.

seven segment display forming caution


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

LED dirve IC by  Maxim Integrated

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 provide in-depth design and IC selection help for design engineers.  Each solution is dedicated to a popular end-equipment type and features design information, circuits and a block diagram.   Within a block diagram, click on a block to view best-fit integrated circuits recommended by Maxim engineers.

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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