SMD LED 0603 Blue Datasheet - Dimensions 1.6x0.8x0.6mm - Voltage 2.8-3.8V - Power 76mW - English Technical Document

1. Product Overview

This document provides the complete technical specifications for a surface-mount blue LED in the 0603 package size. This component is designed for modern electronic assembly processes, offering compatibility with automated placement equipment and various reflow soldering techniques. The LED features a water-clear lens and utilizes InGaN (Indium Gallium Nitride) technology to produce blue light, making it suitable for a wide range of indicator, backlighting, and decorative lighting applications where space is at a premium.

1.1 Core Advantages

• Miniature Footprint: The 0603 package (1.6mm x 0.8mm) allows for high-density PCB layouts.
• Process Compatibility: Fully compatible with infrared (IR) and vapor phase reflow soldering processes, aligning with standard SMT assembly lines.
• Environmental Compliance: Meets RoHS (Restriction of Hazardous Substances) directives and is classified as a green product.
• Standardized Packaging: Supplied in 8mm tape on 7-inch diameter reels, facilitating automated pick-and-place operations.
• Industry Standard: Conforms to EIA (Electronic Industries Alliance) package standards and is compatible with integrated circuit (IC) drive levels.

2. Technical Parameter Deep Dive

2.1 Absolute Maximum Ratings

The absolute maximum ratings define the stress limits beyond which permanent damage to the device may occur. These values are specified at an ambient temperature (Ta) of 25°C and must not be exceeded under any operating conditions.

• Power Dissipation (Pd): 76 mW. This is the maximum power the LED package can dissipate as heat.
• Peak Forward Current (I_F(PEAK)): 100 mA. This is the maximum allowable instantaneous forward current, typically specified under pulsed conditions (1/10 duty cycle, 0.1ms pulse width) to prevent overheating.
• Continuous Forward Current (I_F): 20 mA. This is the recommended maximum DC operating current for reliable long-term performance.
• Current Derating: 0.25 mA/°C. For ambient temperatures above 25°C, the maximum allowable continuous forward current must be reduced linearly by this factor to prevent thermal overstress.
• Reverse Voltage (V_R): 5 V. Applying a reverse voltage exceeding this limit can cause immediate and catastrophic failure. Note that continuous operation under reverse bias is prohibited.
• Operating Temperature Range: -20°C to +80°C. The ambient temperature range over which the LED is designed to function.
• Storage Temperature Range: -30°C to +100°C. The temperature range for non-operational storage.
• Soldering Temperature Tolerance: The LED can withstand wave or IR soldering at 260°C for 5 seconds, or vapor phase soldering at 215°C for 3 minutes.

2.2 Electrical & Optical Characteristics

These parameters are measured at Ta=25°C and define the typical performance of the device under standard test conditions.

• Luminous Intensity (I_V): 28.0 - 180 mcd (millicandela) at I_F = 20mA. This wide range is managed through a binning system (see Section 3). Intensity is measured with a filter approximating the CIE photopic eye-response curve.
• Viewing Angle (2θ_1/2): 130 degrees (typical). This is the full angle at which the luminous intensity drops to half of its peak axial value, indicating a very wide viewing pattern.
• Peak Emission Wavelength (λ_P): 468 nm (typical). The wavelength at which the spectral power distribution is maximum.
• Dominant Wavelength (λ_d): 465.0 - 475.0 nm at I_F = 20mA. This is the single wavelength perceived by the human eye, derived from the CIE chromaticity diagram. It is also subject to binning.
• Spectral Line Half-Width (Δλ): 25 nm (typical). The spectral bandwidth measured at half the maximum intensity (FWHM).
• Forward Voltage (V_F): 2.80 - 3.80 V at I_F = 20mA. The voltage drop across the LED when operating. This range is managed through voltage binning.
• Reverse Current (I_R): 10 μA (max) at V_R = 5V. The small leakage current when the device is reverse-biased.

3. Binning System Explanation

To ensure consistency in mass production, LEDs are sorted into performance bins. This allows designers to select parts that meet specific requirements for color, brightness, and electrical characteristics.

3.1 Forward Voltage Binning

Units: Volts (V) @ 20mA. Tolerance per bin: ±0.1V.
Bin Codes: D7 (2.80-3.00V), D8 (3.00-3.20V), D9 (3.20-3.40V), D10 (3.40-3.60V), D11 (3.60-3.80V).

3.2 Luminous Intensity Binning

Units: millicandela (mcd) @ 20mA. Tolerance per bin: ±15%.
Bin Codes: N (28.0-45.0 mcd), P (45.0-71.0 mcd), Q (71.0-112.0 mcd), R (112.0-180.0 mcd).

3.3 Dominant Wavelength Binning

Units: nanometers (nm) @ 20mA. Tolerance per bin: ±1 nm.
Bin Codes: AC (465.0-470.0 nm), AD (470.0-475.0 nm).

4. Performance Curve Analysis

While specific graphical curves are referenced in the datasheet (e.g., Fig.1, Fig.6), their typical behavior can be described based on the technology.

4.1 Forward Current vs. Forward Voltage (I-V Curve)

The I-V characteristic of an InGaN blue LED is non-linear and exhibits a turn-on voltage around 2.8V. Above this threshold, the current increases exponentially with voltage. Operating at the recommended 20mA ensures stable performance within the specified V_F range. Exceeding the maximum current leads to rapid junction temperature rise and accelerated lumen depreciation.

4.2 Luminous Intensity vs. Forward Current

Luminous intensity is approximately proportional to the forward current in the normal operating range (up to 20mA). However, efficiency may drop at very high currents due to increased thermal effects and carrier overflow. The derating specification is critical for maintaining intensity stability at elevated ambient temperatures.

4.3 Spectral Distribution

The emission spectrum is centered around 468 nm (blue) with a typical half-width of 25 nm. The dominant wavelength (λ_d) determines the perceived color. Minor shifts in λ_d can occur with changes in drive current and junction temperature, which is why binning is essential for color-critical applications.

5. Mechanical & Package Information

5.1 Package Dimensions

The LED is housed in a standard 0603 surface-mount package. Key dimensions (in millimeters) include a body length of 1.6mm, a width of 0.8mm, and a height of 0.6mm. The tolerance for most dimensions is ±0.10mm. The package features a water-clear lens material.

5.2 Polarity Identification & Pad Design

The cathode is typically marked on the device. The datasheet includes suggested soldering pad dimensions to ensure a reliable solder joint and proper alignment during reflow. Following these land pattern recommendations is crucial for achieving good soldering yield and mechanical stability.

6. Soldering & Assembly Guidelines

6.1 Reflow Soldering Profiles

The datasheet provides two suggested infrared (IR) reflow profiles: one for normal (tin-lead) solder process and one for Pb-free (e.g., SnAgCu) solder process. Key parameters include pre-heat temperature and time, peak temperature (max 240°C for normal, higher for Pb-free as specified), and time above liquidus. Adhering to these profiles prevents thermal shock and damage to the LED epoxy or die.

6.2 Cleaning

If cleaning is necessary after soldering, only specified solvents should be used. Immersing the LED in ethyl alcohol or isopropyl alcohol at normal temperature for less than one minute is recommended. Unspecified chemical liquids can damage the package material.

6.3 Storage & Handling

LEDs should be stored in an environment not exceeding 30°C and 70% relative humidity. Once removed from the original moisture-barrier bag, components classified as MSL 2a (like this one) should be reflowed within 672 hours (28 days) to avoid moisture-induced damage (popcorning) during soldering. For longer storage out of the bag, baking at approximately 60°C for at least 20 hours is required before assembly.

7. Packaging & Ordering Information

7.1 Tape and Reel Specifications

The components are packaged in 8mm carrier tape on 7-inch (178mm) diameter reels. Standard reel quantity is 3000 pieces. Empty pockets are sealed with cover tape. Packaging conforms to ANSI/EIA 481-1-A-1994 standards.

8. Application Recommendations

8.1 Typical Application Scenarios

• Status Indicators: Power, connectivity, or activity lights on consumer electronics, networking equipment, and industrial controls.
• Backlighting: Edge-lighting for small LCD displays, keypad illumination.
• Decorative Lighting: Accent lighting in appliances, automotive interiors (non-critical), and signage.
• Sensor Systems: As a light source in proximity or ambient light sensing circuits.

8.2 Circuit Design Considerations

Drive Method: LEDs are current-driven devices. To ensure uniform brightness when connecting multiple LEDs in parallel, it is strongly recommended to use a separate current-limiting resistor in series with each LED (Circuit Model A). Driving LEDs in parallel directly from a voltage source (Circuit Model B) is discouraged because small variations in the forward voltage (V_F) characteristic between individual LEDs will cause significant differences in current sharing and, consequently, brightness. A constant current source is the ideal drive method for optimal stability and longevity.

8.3 Electrostatic Discharge (ESD) Protection

InGaN LEDs are sensitive to electrostatic discharge. To prevent ESD damage:
• Always handle components in an ESD-protected area.
• Use a conductive wrist strap or anti-static gloves.
• Ensure all workstations, tools, and equipment are properly grounded.
• Store and transport LEDs in conductive or anti-static packaging.

9. Technical Comparison & Differentiation

Compared to older technologies like GaP, this InGaN-based blue LED offers significantly higher luminous efficiency and a purer blue color. The 0603 package provides a smaller footprint than 0805 or 1206 LEDs, enabling more compact designs. Its compatibility with Pb-free reflow profiles makes it suitable for modern, environmentally compliant manufacturing. The wide 130-degree viewing angle is a key differentiator for applications requiring broad visibility.

10. Frequently Asked Questions (FAQ)

10.1 What is the difference between Peak Wavelength and Dominant Wavelength?

Peak Wavelength (λ_P) is the physical wavelength at which the LED emits the most optical power. Dominant Wavelength (λ_d) is a calculated value based on human color perception (CIE chart) that represents the single wavelength of the perceived color. For monochromatic LEDs like this blue one, they are often close, but λ_d is the critical parameter for color matching.

10.2 Can I drive this LED at 30mA for more brightness?

No. The absolute maximum continuous forward current is specified as 20mA. Exceeding this rating will reduce the LED's lifespan due to excessive junction temperature and may lead to premature failure. For higher brightness, select an LED from a higher intensity bin (e.g., Q or R) or consider a different package/technology rated for higher current.

10.3 Why is a series resistor necessary even with a constant voltage supply?

The resistor serves as a simple, linear current regulator. The forward voltage of an LED has a negative temperature coefficient and can vary from unit to unit. A series resistor helps stabilize the current against these variations when using a voltage source, providing more consistent brightness and protecting the LED from current spikes.

11. Design-in Case Study

Scenario: Designing a compact IoT device with multiple status LEDs (Power, Wi-Fi, Bluetooth). Space is limited on the PCB.
Solution: This 0603 blue LED is an ideal candidate. Four LEDs are placed on the board edge. The design uses a 3.3V rail. For each LED, a series resistor is calculated: R = (V_supply - V_F) / I_F. Using a typical V_F of 3.2V from bin D8 and I_F of 20mA, R = (3.3V - 3.2V) / 0.02A = 5 Ohms. A standard 5.1Ω resistor is selected. To ensure color consistency, all LEDs are specified from the same dominant wavelength bin (e.g., AC). The PCB layout follows the recommended pad dimensions to ensure good solder fillets.

12. Technology Principle Introduction

This LED is based on InGaN (Indium Gallium Nitride) semiconductor material. When a forward voltage is applied, electrons and holes are injected into the active region of the semiconductor junction. Their recombination releases energy in the form of photons (light). The specific ratio of indium to gallium in the InGaN alloy determines the bandgap energy, which directly correlates to the wavelength (color) of the emitted light—in this case, blue. The water-clear epoxy lens encapsulates the semiconductor die, provides mechanical protection, and shapes the light output pattern.

13. Industry Trends

The trend in SMD LEDs continues toward higher efficiency (more lumens per watt), smaller package sizes (e.g., 0402, 0201), and improved reliability. There is also a growing emphasis on tighter color and intensity binning to meet the demands of display and lighting applications where consistency is paramount. The drive for miniaturization in consumer electronics directly fuels the demand for components like the 0603 LED. Furthermore, compatibility with high-temperature, Pb-free assembly processes remains a standard requirement for global market access.