UVA LED Chip 3W

Item Name: UVA LED Chip 3W

Model Number: GP-3WUVA-G45

Input Current: 700mA

Power: 3W 

Input Voltage: 3-3.8VDC

LED package type: High Power K1 package

Chips brand: Taiwan Epileds 

Emitting Power: 800-1200mW

Color: 395-405NM

Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.

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Note: Other wavelength UV LED’s are also available including 265-280nm, 310 nm, 365 nm and 405 nm (UVA and UVB). Minimum buy and lead times will vary, but typically start at 100 pcs and 1 weeks.  Please contact us with your wavelength and quantity to receive pricing and lead times.

Light-emitting diodes (LEDs) can be manufactured to emit radiation in the ultraviolet range. In 2019, following significant advances over the preceding five years, UVA LEDs of 365 nm and longer wavelength were available, with efficiencies of 50% at 1000 mW output. Currently, the most common types of UV-LEDs that can be found/purchased are in 395- and 365-nm wavelengths, both of which are in the UVA spectrum. When referring to the wavelength of the UV LEDs, the rated wavelength is the peak wavelength that the LEDs put out, and light at both higher and lower wavelength frequencies near the peak wavelength are present, which is important to consider when looking to apply them for certain purposes. The cheaper and more common 395-nm UV LEDs are much closer to the visible spectrum, and LEDs not only operate at their peak wavelength, but they also give off a purple color, as well, and ends up not emitting pure UV light unlike other UV LEDs that are deeper into the spectrum.Such LEDs are increasingly used for applications such as UV curing applications, charging glow-in-the-dark objects such as paintings or toys, and they are becoming very popular in a process known as retro-brighting, which speeds up the process of refurbishing/bleaching old plastics and portable flashlights for detecting counterfeit money and bodily fluids, and are already successful in digital print applications and inert UV curing environments. Power densities approaching 3 W/cm2 (30 kW/m2) are now possible, and this, coupled with recent developments by photo-initiator and resin formulators, makes the expansion of LED-cured UV materials likely.

UVC LEDs are developing rapidly, but may require testing to verify effective disinfection. Citations for large-area disinfection are for non-LED UV sources known as germicidal lamps. Also, they are used as line sources to replace deuterium lamps in liquid chromatography instruments.

UVA LED application:

UV curing for the printing machines:

UV curing (ultraviolet curing) is the process by which ultraviolet light is used to initiate a photochemical reaction that generates a crosslinked network of polymers. UV curing is adaptable to printing, coating, decorating, stereolithography, and in the assembly of a variety of products and materials. In comparison to other technologies, curing with UV energy may be considered a low temperature process, a high speed process, and is a solventless process, as cure occurs via direct polymerization rather than by evaporation.

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