LED light bar(5 bars | 37.40*7.00mm) | Ultra Green

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Product Series
Series No:BL-AR05Z3707
Specification Download:
37.4 × 7 × 8.5 mm
LED light bar(5 bars,37.40*7.00mm) Lightbar LED Introduction: In the ever-evolving world of electronics, LED light bars, especially the compact 5 bars measuring 37.40*7.00mm, stand out for their versatility and efficiency. This article delves into the features, applications, benefits, and real-world case studies of LED light bars, specifically focusing on the bar graph LED or LED bar graph display. Designed for electronics manufacturers, engineers, purchasers, and administrators, this piece aims to illuminate the multifaceted uses and advantages of integrating these components into various projects. The Essence of Bargraph LED Technology The bargraph LED, commonly referred to as the LED bar graph display, represents a significant advancement in visual feedback technology. These devices are not just about aesthetic appeal; they serve crucial practical purposes. From simple battery level indicators to complex data monitoring systems, the LED light bar’s ability to provide immediate, easy-to-understand visual feedback is unparalleled. Features and Applications The 5-bar LED light bar, with its precise dimensions of 37.40*7.00mm, offers an optimal blend of compactness and visibility. This section explores the technical specifications that make these light bars highly sought after in electronics. Additionally, we delve into various applications, from automotive dashboards to industrial equipment monitoring, highlighting how these LEDs can be tailored to meet specific project needs. Benefits of Integrating LED Light Bars Beyond their functional appeal, LED light bars bring a host of benefits. They are energy-efficient, durable, and offer a broad spectrum of colors for diverse signaling needs. This part of the article outlines the advantages of using LED light bars in projects, emphasizing their role in enhancing user interface and product longevity. Case Studies: Real-World Applications Through detailed case studies, we showcase successful implementations of LED light bars in various sectors. Each study highlights the problem-solving aspect of these components, providing insights into how they have been utilized to improve operational efficiency and user experiences. User Testimonials: Voices from the Field Hearing directly from those who have integrated LED light bars into their projects adds a layer of authenticity and trust. This section compiles testimonials from engineers and purchasers, offering firsthand accounts of the improvements and benefits observed post-implementation. Conclusion and Call to Action Concluding, the article reiterates the significance of the 5-bar LED light bars in modern electronics projects. Encouraging readers to consider these components for their next project, it ends with a call to action, guiding them towards making informed purchasing decisions.
LED light bar(5 bars ,37.40*7.00mm)
LED light bar(5 bars ,37.40*7.00mm)


  • Display Area Shape: Rectangular, offering distinct areas for illumination.
  • Display Area Number: Features five display areas.
  • Reflector Dimensions: Length of 37.40mm and width of 7.00mm, offering a substantial display area for multiple indicators.
  • Suitable for Level Indicators: Specifically designed for indicating levels in various applications.
  • Low Current Operation: Energy-efficient, leading to reduced power consumption.
  • Wide Viewing Angle: Allows the display to be easily visible from different perspectives.
  • Uniform Light Emitting Area: Ensures consistent and even lighting across all display areas.
  • Easily Mounted on P.C. Boards: Designed for straightforward integration into electronic systems.
  • Flush Mountable: Can be installed to align seamlessly with the surface, providing a clean and integrated look.
  • Excellent On/Off Contrast: Enhances visibility and readability, crucial for level indicators.
  • Can be Used with Panels and Legend Mounts: Versatile in terms of installation, suitable for various panel types.
  • Categorized for Luminous Intensity: Ensures uniform brightness across different units.
  • Different Colors in One Unit Available: Offers options for various color displays, enhancing customization.
  • Standard: Black Face, White Segment: Classic appearance for easy identification and readability.
  • RoHS Compliance: Meets environmental and safety standards.


  • Level Indicators: Ideal for applications requiring multiple level indications, such as fluid tanks, battery monitors, or other measurement systems.
  • Control Panels: Suitable for use in control panels in machinery, vehicles, or electronic devices where multiple indicators are necessary.
  • Signal Lights: Applicable in settings where a series of signal lights are needed for indicating different statuses or conditions.
  • Instrumentation Displays: Useful for displaying multiple statuses or measurements in instrumentation panels.
  • Consumer Electronics: Can be integrated into consumer electronic devices for displaying various indicators or levels.
  • Safety and Emergency Equipment: Suitable for indicating different safety levels or conditions in emergency equipment.
  • Information Displays: Effective in conveying multiple pieces of information in a structured format, especially in public areas or systems.
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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