LTL42FYYGHKPRY LED Lamp Specification Sheet - Yellow and Yellow-Green - 20mA - 52mW - Chinese Technical Document

1. Product Overview

LTL42FYYGHKPRY is a through-hole LED lamp specifically designed for circuit board indication. It features a black plastic right-angle bracket (housing) paired with an LED chip assembly. This design belongs to the Circuit Board Indicator (CBI) series, offering easy assembly and multiple mounting configurations, including top-view and right-angle orientations, and is stackable for array applications.

1.1 Core Advantages

• Easy Assembly:The design is optimized for a simplified circuit board assembly process.
• Enhanced Contrast:The black housing material provides high contrast, improving the visibility of the light emission.
• High Energy Efficiency:Features low power consumption and high luminous efficiency.
• Environmental Compliance:This is a lead-free product, compliant with the RoHS (Restriction of Hazardous Substances) directive.
• Chip Technology:Manufactured using AlInGaP semiconductor technology for yellow (569nm, 589nm) and yellow-green LEDs, providing stable and bright output.

1.2 Target Applications

This LED light is suitable for a wide range of electronic device applications, including but not limited to:

• Computer systems and peripherals
• Communication equipment
• Consumer electronics
• Industrial equipment and control devices

2. In-depth Analysis of Technical Parameters

This section provides a detailed and objective analysis of the key electrical, optical, and thermal parameters of the LTL42FYYGHKPRY LED.

2.1 Absolute Maximum Ratings

These ratings define the limits beyond which permanent damage to the device may occur. Continuous operation at or near these limits is not recommended.

• Power Dissipation (Pd):52 mW (for Yellow and Yellow-Green LEDs). This parameter indicates the maximum power the LED can dissipate as heat at an ambient temperature (TA) of 25°C.
• Peak Forward Current (I_F(PEAK))):60 mA. This is the maximum allowable pulse forward current, under strict conditions: duty cycle ≤ 1/10 and pulse width ≤ 10μs. Exceeding this value may cause immediate junction failure.
• DC Forward Current (I_FF):
• 20 mA. This is the recommended maximum continuous forward current for long-term reliable operation.Operating Temperature Range:
• -40°C to +85°C. The device is designed to operate within this ambient temperature range.Storage Temperature Range:
• -45°C to +100°C. The device can be safely stored within this range when not in operation.Pin soldering temperature:

260°C, for a maximum of 5 seconds, measured at a point 2.0mm (0.079 inches) from the LED body. This is crucial for wave soldering or hand soldering processes to prevent thermal damage to the epoxy lens or internal chip bonding points.

2.2 Electrical and Optical Characteristics_FThese are typical performance parameters measured under conditions of TA=25°C and I

• F_V=10mA (unless otherwise specified). They define the expected behavior of the device under normal operating conditions.Luminous Intensity (I
  • V
  • ):
• Measures the perceived power of light emitted in a specific direction._{Yellow LED (LED1, LED2): Typical value is 14 mcd, ranging from 3.8 mcd (minimum) to 30 mcd (maximum). Test tolerance is ±15%.}Yellow-green LED (LED3): Typical value is 15 mcd, ranging from 8.7 mcd (minimum) to 29 mcd (maximum). Test tolerance is ±15%.Viewing Angle (2θ
• 1/2_P):Dukannin LED duk 100 digiri. Wannan shine cikakken kusurwar da ƙarfin haske ya ragu zuwa rabin ƙarfin 0° (axial). Kusurwar 100° tana nuna yanayin fitarwa mai faɗi da yaduwa, wanda ya dace da nuna yanayi.
  • Tsayin raƙuman fitarwa mafi girma (λ
  • P
• ):_dTsayin raƙuman da fitarwar bakan ta fi ƙarfi.LED rawaya: 591 nm.
  • LED rawaya-kore: 572 nm.
  • Babban tsayin raƙuman (λ
• D):
• Tsayin raƙuman guda ɗaya wanda ya fi wakiltar launin haske da ake ji, wanda ya samo asali daga taswirar launi na CIE._FLED rawaya: ƙimar al'ada 588 nm, kewayon 584-594 nm. Rangwamen gwaji shine ±1 nm.LED na rawaya-kore: Matsakaicin ƙima 570 nm, kewayon 566-574 nm. Gwajin jurewa shine ±1 nm.
  • Rabin nisa na layin bakan (Δλ):_FDuk LED suna da 15 nm. Wannan yana nuna tsaftar bakan; ƙimar ƙasa, launi ya fi kusa da launi guda.
• Ƙarfin lantarki na gaba (V_RF):_RLED yana faɗuwar ƙarfin lantarki yayin wucewar ƙayyadadden igiyar ruwa ta gaba.Matsakaicin ƙima na duk LED shine 2.0V, a cikin IF

Maximum 2.6V at =10mA.

Igilar ruwa ta baya (I

R

):_FAt a reverse voltage (V

R

• ) of 5V, maximum 10 μA.Important Note:
• This device is not designed for reverse bias operation. This test condition is for characterization only.3. Binning System Description
• To ensure color and brightness consistency in production, LEDs are sorted into different bins based on key parameters. The LTL42FYYGHKPRY is binned separately for luminous intensity and dominant wavelength.3.1 Luminous Intensity Binning
• LEDs are binned based on their IF

Classify based on luminous intensity measured at =10mA.

3.1.1 Yellow LED (LED1, LED2)

• Grade 3ST:3.8 - 6.5 mcd
• Grade 3UV:6.5 - 11 mcd
• Grade 3WX:11 - 18 mcd

Gear 3YX:

18 - 30 mcd

The tolerance for the limit value of each gear is ±15%.

3.1.2 Yellow-green LED (LED3)

• Gear L3:8.7 - 12.6 mcd
• Gear L2:12.6 - 19 mcd
• Gear L1:19 - 29 mcd
• The tolerance for the limit value of each gear is ±15%.3.2 Dominant Wavelength (Hue) Binning
• LEDs are sorted according to their precise color point (defined by the dominant wavelength).3.2.1 Yellow LEDs (LED1, LED2)

Gear H15:

584.0 - 586.0 nm

• Gear H16:586.0 - 588.0 nm
• Gear H17:588.0 - 590.0 nm
• Gear H18:590.0 - 592.0 nm
• Gear H19:592.0 - 594.0 nm

The tolerance for the limit of each gear is ±1 nm.

3.2.2 Yellow-green LED (LED3)

Gear H06:

566.0 - 568.0 nm

Gear H07:_F568.0 - 570.0 nm

Gear H08:

570.0 - 572.0 nm

Gear H09:

572.0 - 574.0 nm

• The tolerance for the limit of each gear is ±1 nm.4. Performance Curve Analysis
• Although the datasheet references specific graphical curves (Typical Electrical/Optical Characteristics curves on pages 5-6), the implicit relationships are crucial for design._F4.1 Forward Current vs. Forward Voltage (I-V Curve)This relationship exhibits exponential characteristics. For a typical V
• Fvalue of 2.0V at 10mA, a slight increase in current will lead to a corresponding increase in voltage. Since the LED's forward voltage has a negative temperature coefficient, constant current drive is essential for maintaining stable light output and preventing thermal runaway.

A cikin kewayon aiki na yau da kullun (har zuwa 20mA), ƙarfin haske yana daidai daidai da halin yanzu na gaba. Duk da haka, a cikin mafi girma na yanzu, yuwuwar iya aiki na iya raguwa saboda haɓakar zafin jiki. Yin aiki a cikin madaidaicin 10mA yana ba da daidaito mai kyau tsakanin haske da rayuwa.

4.3 Dogaro da Zazzabi

LED performance is sensitive to temperature.

• Luminous Intensity:
• Yawanci yana raguwa tare da haɓakar zafin jiki.
• Ƙarfin lantarki na gaba (V
• F

):

Yana raguwa tare da haɓakar zazzabi (ma'aunin zazzabi mara kyau).

Dominant Wavelength:

Yana iya ɗan ƙaura tare da zazzabi, yana shafar fahimtar launi.

Proper thermal management is required in the application to maintain specified performance over the entire operating temperature range.

• 5. Mechanical and Packaging Information5.1 Outline DimensionsThe datasheet contains detailed mechanical drawings. Key notes on the drawings:
• All dimensions are in millimeters (inches are also provided).
• Unless otherwise specified, the standard tolerance is ±0.25mm (0.010 inches).
• The bracket (housing) material is black or dark gray plastic.

LED1 and LED2 are yellow, equipped with yellow diffuser lenses. LED3 is yellow-green, equipped with a green diffuser lens.

5.2 Gano Polariti

Don LED na shigar kai tsaye, ana gane cathode ta hanyar fili a kan ruwan tabarau, gajeren ƙafar, ko wasu alamomi da aka nuna a cikin zanen girma. Dole ne a kula da daidaitaccen polarity yayin haɗa PCB.

• 6. Jagororin Walda da HaɗawaYin biyayya wa waɗannan jagororin yana da mahimmanci ga amincin aiki da kuma hana lalacewa yayin samarwa.
• 6.1 Siffanta ƘusaDole ne lanƙwasa ya kasance

Kafin walda

• A yi a cikin dakin zafi.Madaidaicin lanƙwasa ya kamata ya kasance aƙalla milimita 3 daga tushen ruwan tabarau na LED.
• Kada a yi amfani da tushen tsarin jagora a matsayin madaidaicin jiki.A yi amfani da mafi ƙarancin ƙarfin matsa lokacin shigar da PCB, don guje wa matsin inji.
• 6.2 Siffofin waldaDole ne a kiyaye aƙalla tazarar milimita 2 tsakanin wurin walda da tushen ruwan tabarau/tsayayyen. Ruwan tabarau/tsayayyen ba za a nutsar da shi cikin kayan walda ba.
• 6.2.1 Irin ƙarfe na waldaTemperature:

Maximum 350°C.Time:Maximum 3 seconds per solder joint (one time only).6.2.2 Wave Soldering

Zazzabi na preheating:

• Maximum 120°C.
• Lokacin dumama:
• Mafi yawan daƙiƙa 100.

Zazzabin igiyar walda:

Mafi girma 260°C.

Welding time:

Maximum 5 seconds.

Warning:Excessive temperature or duration may cause lens deformation or catastrophic failure. Infrared reflow solderingNot suitable for

This through-hole LED lamp product.

6.3 Storage Conditions

Recommended storage environment: ≤ 30°C and relative humidity ≤ 70%.

LEDs removed from the original moisture barrier packaging should be used within three months.

For long-term storage outside the original packaging, it should be stored in a sealed container with desiccant or in a nitrogen environment desiccator.

6.4 Tsaftacewa

• Idan ana buƙatar tsaftacewa, yi amfani da kaushi na barasa, kamar isopropyl alcohol.7. Bayanin Aikace-aikace da La'akari da Zane
• 7.1 Hanyar TuƙiLED na'urori ne masu amfani da ƙarfin lantarki. Don tabbatar da daidaitaccen ƙarfin haske da launi, da kuma hana lalacewa, su
• dole neDriven by a constant current source, or in series with a voltage source and a current-limiting resistor. The design should be based on the maximum DC forward current (20mA) and the typical forward voltage (2.0V).
• 7.2 Thermal ManagementDespite the low power dissipation (52mW), ensuring adequate airflow or heat dissipation in high-density layouts or high ambient temperatures helps maintain the junction temperature within a safe range, thereby preserving performance and lifespan.

7.3 Optical Considerations

The 100-degree viewing angle and diffused lens provide broad, uniform illumination suitable for panel indicators. The black housing minimizes stray light and enhances contrast. Secondary optics may be required for applications needing specific beam patterns.
8. Technical Comparison and Differentiation

While a direct comparison requires specific competitor data, based on its datasheet, the key differentiators of this product include:
Single-package dual-color array:_{Integrating two yellow and one yellow-green LEDs in a stackable housing enables compact multi-state indication.}Wide operating temperature range:_FSuitability from -40°C to +85°C for industrial and automotive environments, where many consumer-grade LEDs may not operate reliably._FTight binning with tolerances:_FClearly defined binning for intensity (±15%) and wavelength (±1nm) allows precise color and brightness matching across production lots, reducing the need for post-assembly calibration._FRobust mechanical design:_FRight-angle bracket design facilitates assembly and provides physical protection for the LED element.

9. Frequently Asked Questions (based on technical specifications)
Q1: Can I drive this LED continuously at 20mA?

A1: Yes, 20mA is the recommended maximum continuous DC forward current. For optimal lifetime and considering variations, a typical design current of 10-15mA is usually advised.
Q2: What resistor value should I use when using a 5V power supply?

A2: Use Ohm's Law: R = (V

Power Supply
- V

• F) / I
• F. For a typical V_Fvalue of 2.0V and a target I_FF
• value of 10mA: R = (5V - 2.0V) / 0.01A = 300 Ω. Use the nearest standard value (e.g., 330 Ω for a slightly lower current). Be sure to use the maximum VF
• Calculate using the value (2.6V) to ensure the current does not exceed the limit under worst-case conditions.Q3: Why is the peak current rating (60mA) much higher than the DC rating?
• A3: The peak current rating applies to extremely short pulses (≤10μs) with a low duty cycle (≤10%). This allows for applications such as multiplexing or brief overdriving for brighter blinking signals, but the average power and junction temperature must be kept within limits to avoid damage.Q4: Can I use reflow soldering for this LED?

A4: No. The datasheet clearly states "Infrared reflow soldering is not applicable to through-hole LED lamp products." Only wave soldering or hand soldering with an electric soldering iron following the specified time/temperature profile can be used.

10. Design Case Study

Scenario: Designing a multi-status indicator panel for an industrial controller.

The panel needs to display Power (steady yellow), Activity (blinking yellow), and Fault (steady yellow-green). Use LTL42FYYGHKPRY: