Green LED 1.6x0.8x0.4mm - Forward Voltage 2.3-3.0V - Power 60mW - Dominant Wavelength 525-535nm - RF-TGM190TS-CA-P1 Technical Specification

1. Product Overview

This green chip LED is fabricated using a high-efficiency green LED chip and encapsulated in a miniature 1.6mm x 0.8mm x 0.4mm surface-mount package. The device delivers a dominant wavelength range of 525nm to 535nm, making it suitable for various indicator and display applications. With an extremely wide viewing angle of 140° and a low forward voltage starting from 2.3V, it offers excellent optical performance for general-purpose use.

The LED is designed for automated SMT assembly and is compatible with standard reflow soldering processes. It is classified as moisture sensitivity level 3 (MSL 3) and is fully RoHS compliant. The absolute maximum ratings include a power dissipation of 60mW, a forward current of 20mA (60mA peak), and an operating temperature range from -40°C to +85°C.

2. Optical and Electrical Characteristics

The following table summarizes the key optical and electrical parameters at an ambient temperature of 25°C and a test current of 2mA (unless otherwise noted).

2.1 Forward Voltage (VF)

The forward voltage is binned into several sub-ranges (D2, E1, E2, F1, F2, G1, G2) with typical values from 2.3V to 2.9V and maximum values from 2.4V to 3.0V. The exact bin code depends on the voltage measured at IF=2mA.

2.2 Dominant Wavelength (λD)

The dominant wavelength is categorized into four bins: F10 (525-527.5nm), F20 (527.5-530nm), G10 (530-532.5nm), and G20 (532.5-535nm). The spectral half bandwidth (Δλ) is typically 15nm.

2.3 Luminous Intensity (IV)

Luminous intensity is sorted into bins ranging from FD0 (90-100 mcd) through 1FS (150-160 mcd) at IF=2mA. The tolerance on measurement is ±10%.

2.4 Other Parameters

The viewing angle (2θ1/2) is 140° (typical). Reverse current (IR) at VR=5V is ≤10 μA. Thermal resistance (RTHJ-S) is ≤450 °C/W.

3. Binning System

The product is sorted by forward voltage, dominant wavelength, and luminous intensity. Bin codes are marked on the reel label as shown in the packaging section. Customers should specify the required bin combination when ordering to ensure consistency in their application.

4. Typical Optical Characteristics Curves

The data sheet provides several characteristic curves to help designers understand the device behavior under different conditions.

4.1 Forward Voltage vs. Forward Current

At low current (below 5mA), the forward voltage increases sharply. The curve shows a non-linear relationship typical of diodes. At 20mA, forward voltage is approximately 3.0V (typical for green chips).

4.2 Relative Intensity vs. Forward Current

The relative luminous intensity increases linearly with forward current up to about 20mA, after which saturation begins. This curve is useful for determining the optimal drive current for a given brightness requirement.

4.3 Pin Temperature vs. Relative Intensity

As ambient temperature rises, the relative intensity decreases. At 100°C, the intensity drops to approximately 0.85 of the value at 25°C. Thermal management is critical to maintain consistent light output.

4.4 Pin Temperature vs. Forward Current

The maximum forward current must be derated at higher pin temperatures. The safe operating area is defined in the curve; for example, at 100°C the allowable forward current reduces to about 10mA.

4.5 Forward Current vs. Dominant Wavelength

Increasing the forward current from 0 to 30mA causes a slight shift in dominant wavelength (approximately 2-3nm toward longer wavelengths) due to junction heating. This effect must be considered in color-critical applications.

4.6 Relative Intensity vs. Wavelength

The spectrum shows a narrow emission peak around 527nm (typical for green). The full width at half maximum (FWHM) is about 15nm, providing good color purity.

4.7 Radiation Pattern

The polar radiation plot indicates a wide, Lambertian-style distribution with half-intensity at approximately ±70°. This makes the LED suitable for applications requiring broad illumination.

5. Mechanical and Packaging Information

5.1 Package Dimensions

The LED package measures 1.6mm (length) x 0.8mm (width) x 0.4mm (height). Tolerances are ±0.2mm unless otherwise noted. The top view shows two electrical pads (pad 1 and pad 2) with dimensions 0.22mm x 0.70mm. The bottom view indicates the polarity mark (anode pad is larger). The recommended soldering pattern is provided with pad dimensions 0.8mm x 0.8mm spaced 2.4mm apart.

5.2 Carrier Tape and Reel

The LEDs are packaged in carrier tape with 8mm width, 4mm pitch, and a cavity size accommodating the 1.6x0.8mm package. The tape includes polarity marks and a top cover tape. Each reel holds 4,000 pieces. The reel outer diameter is 178±1mm, hub diameter 60±1mm, and tape width 8.0±0.1mm.

5.3 Label Information

The reel label includes the part number, spec number, lot number, bin code (luminous flux, chromaticity, forward voltage, wavelength), quantity, and date code. The label is affixed to the reel and also to the moisture barrier bag.

6. Soldering and Assembly Guidelines

6.1 Reflow Soldering Profile

The recommended reflow profile follows JEDEC standards. Key parameters: ramp-up rate ≤3°C/s, preheat from 150°C to 200°C for 60-120 seconds, time above 217°C (TL) of 60-150 seconds, peak temperature (TP) 260°C with a maximum time of 10 seconds within 5°C of TP, and cooling rate ≤6°C/s. The total time from 25°C to peak should not exceed 8 minutes. Only two reflow passes are allowed.

6.2 Hand Soldering

If manual soldering is required, the iron temperature must be ≤300°C and contact time ≤3 seconds. Only one hand-soldering operation is permitted.

6.3 Storage and Moisture Handling

The LEDs are stored in a moisture barrier bag with desiccant. Before opening the bag, storage conditions are ≤30°C and ≤75% RH for up to one year. After opening, the LEDs must be used within 168 hours at ≤30°C and ≤60% RH. If the storage time is exceeded or the desiccant indicator shows moisture, the LEDs must be baked at 60±5°C for at least 24 hours before use.

7. Packaging and Ordering Information

The standard packaging unit is a reel of 4,000 pieces. The reels are sealed in moisture barrier bags, with labels indicating bin codes. Multiple reels are packed in cardboard boxes. When ordering, customers should specify the required bin codes for forward voltage, wavelength, and intensity to ensure product uniformity.

8. Application Recommendations

This green LED is suitable for optical indicators, switches, symbols, displays, and general-purpose lighting. Designers should consider thermal management: the junction temperature must not exceed 95°C, and power dissipation should be kept under 60mW. A current-limiting resistor is mandatory to prevent current overshoot due to voltage variations. The LED is ESD-sensitive (HBM 1000V); proper ESD protection during handling is required.

9. Handling Precautions

Avoid applying mechanical stress to the silicone lens. Use proper tools to pick and place the LEDs from the side. Do not touch the lens surface directly. The environment must have low sulfur content (<100ppm) to prevent discoloration. Bromine and chlorine content in surrounding materials should be individually <900ppm and total <1500ppm. Volatile organic compounds (VOCs) can degrade the silicone encapsulant; avoid adhesives that outgas organic vapors.

10. Reliability and Quality

The product is subjected to reliability tests including reflow (260°C, 10s, 2 cycles), temperature cycle (-40°C to 100°C, 100 cycles), thermal shock (-40°C to 100°C, 300 cycles), high-temperature storage (100°C, 1000h), low-temperature storage (-40°C, 1000h), and life test (25°C, 2mA, 1000h). Acceptance criteria: forward voltage change ≤1.1x upper spec limit, reverse current ≤2x upper spec limit, and luminous intensity ≥0.7x lower spec limit.

The technical information provided is based on typical characteristics and does not constitute a warranty for specific applications. End users should verify performance in their own system conditions.