1204 SMD LED, side emitting

Series No:




3.2 x 1 x 1.5


SMD 1204 chipLED





The 1204 SMD LED, known for its side emitting capabilities, is a powerful component in the landscape of modern lighting solutions. This detailed article delves into the characteristics, uses, and advantages of the 1204 SMD LED, side emitting, complemented by real-world case studies and testimonials. It serves as a comprehensive resource for electronics manufacturers, engineers, purchasers, and administrators looking to integrate advanced lighting technologies into their projects.

Unique Features of the 1204 SMD LED, Side Emitting

The 1204 SMD LED is distinguished by its side emitting feature, which allows for directional light output that is ideal for slim and compact applications. Key features include:

  • Compact and Efficient Design: Designed to emit light from the side, it is perfect for applications where space is limited and traditional top-emitting LEDs are not suitable.
  • High Luminosity: Despite its small size, it provides excellent brightness, making it effective for high-visibility applications.
  • Energy Efficiency: Consumes less power compared to traditional LEDs, making it a cost-effective solution for various applications.

Applications of the 1204 SMD LED

The versatility of the 1204 SMD LED, side emitting, allows it to be used in a wide array of applications:

  • Consumer Electronics: Common in mobile devices and laptops for backlighting keyboards and displays where space is at a premium.
  • Automotive Lighting: Used in dashboard illumination and vehicle contour lighting, providing essential visibility without intruding into the overall design.
  • Signage and Display: Ideal for edge-lit signs and retail displays, where directional lighting is necessary to enhance visibility and readability.

Benefits of Using 1204 SMD LEDs

Employing 1204 SMD LEDs in electronic and lighting projects offers significant advantages:

  1. Enhanced Aesthetic Appeal: The side emitting nature allows for a more streamlined design, contributing to the aesthetic enhancement of the final product.
  2. Reduced Energy Consumption: With greater efficiency than conventional LEDs, these LEDs help reduce overall energy costs.
  3. Versatility in Design: Their compact size and unique emission angle provide increased flexibility in design, particularly in tight spaces.

Case Studies: Impact of the 1204 SMD LED

  • Enhanced Consumer Electronics: A leading smartphone manufacturer implemented the 1204 SMD LEDs in a new model, significantly improving the aesthetic and functionality of the edge lighting of the screen.
  • Innovative Automotive Applications: An automotive brand used these LEDs for interior ambient lighting, enhancing the driving experience while maintaining low energy consumption.

User Testimonials

  • Chloe Tan, Product Engineer at TechGadget Inc.: “The 1204 SMD LEDs have revolutionized our designs, allowing us to integrate lighting in ways we couldn’t before due to space constraints.”
  • Mike Johnson, Senior Buyer at AutoParts Ltd.: “The durability and efficiency of the 1204 SMD LEDs have significantly decreased our maintenance and energy costs.”

Conclusion: Why Choose the 1204 SMD LED, Side Emitting?

The 1204 SMD LED, side emitting, offers a unique combination of design flexibility, efficiency, and high performance, making it an excellent choice for a wide range of applications. Its ability to provide targeted illumination in compact spaces makes it invaluable for enhancing the design and functionality of modern electronic devices.

Call to Action: Elevate your electronic and lighting projects with the innovative 1204 SMD LED, side emitting. Contact our experts today to discover how these LEDs can transform your design possibilities!

1204 SMD LED, side emitting
1204 SMD LED, side emitting


  • 3.2mm x 1.0mm SMD, 1.5mm Thickness: This Surface-Mount Device (SMD) LED is compact and thin, making it suitable for high-density mounting on circuit boards. Its side-emitting design is particularly useful for certain lighting applications.
  • Mono-Color Type with Ultra Brightness: Provides a single-color light output with high luminosity, ensuring clear visibility and strong illumination.
  • Compatible with Automatic Placement Equipment: Designed for seamless integration with automated assembly systems, enabling efficient, high-speed placement and soldering on circuit boards.
  • Wide Viewing Angle: Offers a broad range of visibility, especially important for side-emitting LEDs where directional light is required.
  • Ideal for Backlight and Indicator: Perfectly suited for use as a backlight in display panels or as a mono-color indicator light in various electronic devices.
  • Packaged 3,000 Pieces per Reel: Supplied in bulk with 3,000 pieces per reel, facilitating efficient handling and manufacturing processes.
  • RoHS Compliance: Manufactured in accordance with the Restriction of Hazardous Substances directive, ensuring environmentally safer production and use.


  • Edge-Lighting Applications: Suitable for edge-lighting in displays and signage where the side-emitting feature can be utilized effectively.
  • Backlighting for Slim Displays: Ideal for backlighting in ultra-thin displays where traditional top-emitting LEDs may not fit.
  • Automotive Interior Lighting: Appropriate for car interior applications like dashboard lighting and control panels, where directional light is beneficial.
  • Consumer Electronics: Can be used in personal devices like smartphones, tablets, laptops, especially in applications requiring side lighting.
  • Indicators in Appliances: Suitable for use as status or signal indicators in household and commercial appliances, providing directional illumination.
  • Illumination in Confined Spaces: Well-suited for lighting in narrow or confined spaces in various electronic devices.
  • Portable Electronics: Given its small size and directionality, it’s ideal for portable and wearable technology.
  • Decorative Lighting: Can be used for decorative purposes in architectural designs and interior decoration where side-emitting light is desired.

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
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Package configuration & Internal circuit diagram
1204 SMD LED, side emitting

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

Partno description:

LEDs, Light Emitting diodes, which include various small kinds, such as 3mm, 5mm, 8mm, 10mm; round type, rectangular type square type, tower type, Oval led, elliptical, flat top; SMDs, high power led, piranha LEDs

Part No of  LED diode

More Information

Lens Color:

Meaningcolor DiffusedColor TintedWater ClearWater DiffusedOrange diffused 

Absolute maximum ratings (Ta=25°C)

Forward Current I F252525303030303030303030mA
Power Dissipation P d606060656575110110120120120120mW
Reverse Voltage V R555555555555V
Peak Forward Current I PF (Duty 1/10 @1KHZ)150150150150150150150100100100100100mA
Operation Temperature T OPR-40 to +80°C
Storage Temperature T STG-40 to +85°C
Lead Soldering Temperature T SOL  Max.260+-5°C for 3 sec Max. (1.6mm from the base of the epoxy bulb)°C
Related Information

Applied for:
auto lampcameradome lightrgb screentraffic light


The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment, 

communication equipment and household applications). Consult 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 devices).

CAUTIONS for Through-Hole LED Lamps

1. Application
The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment, communication equipment and household applications). Consult 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 devices).

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

3. Cleaning
Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LED if necessary

4. Lead Forming & Assembly
During lead forming, the leads should be bent at a point at least 3mm from the base of LED lens. Do not use
the base of the leadframe as a fulcrum during forming.
Lead forming must be done before soldering, at normal temperature.
During assembly on PCB, use minimum clinch force possible to avoid excessive mechanical stress.

led diode formingassembly notice of led diode


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

Drive Method

An LED is a current-operated device. In order to ensure intensity uniformity on multiple LEDs connected in 

parallel in an application, it is recommended that a current limiting resistor be incorporated in the drive circuit,

 in series with each LED as shown in Circuit A below.

drive notice - led diode

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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