The Lite-On LTE-4208 is a high-radiant-power 940nm infrared emitting diode designed for infrared sensing, optical transmission and detection applications. It is molded in a T-1 3/4 approximately 5mm through-hole package with a water-clear lens, providing a compact and directional infrared light source.
The device features a 940nm peak emission wavelength and a typical spectral half-width of 50nm. Its typical forward voltage is 1.2V at 20mA, with a maximum specified forward voltage of 1.6V under the same test condition.
LTE-4208 supports a maximum 50mA continuous forward current and a peak forward current of up to 3A under specified 10µs pulse conditions at 300pps. Maximum power dissipation is rated at 100mW.
The emitter provides a relatively narrow 20° viewing angle, making it suitable for applications requiring concentrated infrared radiation. Radiant intensity depends on the production bin, with the datasheet specifying values starting from 3.31mW/sr at 20mA.
The LTE-4208 is mechanically and spectrally matched for use with the LTR-3208 phototransistor series, making the combination suitable for optical sensing and emitter-receiver designs. It is also lead-free and RoHS compliant.
Key Features
- Manufacturer: Lite-On Technology / 光宝
- Part Number: LTE-4208
- Product Type: Infrared LED Emitter
- Peak Wavelength: 940nm
- Lens: Water Clear
- Package: T-1 3/4 / Approx. 5mm
- Mounting Type: Through Hole
- Typical Forward Voltage: 1.2V @ 20mA
- Maximum Forward Voltage: 1.6V @ 20mA
- Maximum Continuous Forward Current: 50mA
- Peak Forward Current: 3A under specified pulse conditions
- Maximum Power Dissipation: 100mW
- Viewing Angle: 20°
- Spectral Half-Width: 50nm
- Radiant Intensity: From 3.31mW/sr @ 20mA depending on bin
- Reverse Voltage Test Rating: 5V
- Operating Temperature: -40°C to +85°C
- Storage Temperature: -55°C to +100°C
- Matched Phototransistor Series: LTR-3208
- Lead-Free
- RoHS Compliant
- Typical Applications: Smoke detectors, infrared emitters, optical sensing and IR transmission systems
These electrical and optical ratings are specified in Lite-On’s LTE-4208 Rev. D datasheet.
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