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Ceramic, high-power UV LEDs promise long lifetime

16 Oct 2015

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Vishay Intertechnology Inc. has rolled out the first two devices in a series of ceramic-based, high-power UV LEDs with silicone lenses. Aimed to deliver a reliable, energy-saving replacement for mercury lamps, the VLMU3500-385-060 and VLMU3500-385-120 promise exceptionally long lifetimes in compact 3.5mm x 3.5mm surface-mount packages for medical, industrial and printing applications.

VLMU3500-385-060, VLMU3500-385-120

The environmentally friendly UV LEDs are free of heavy metals and provide increased reliability with their shock resistance and immunity to degradation from frequent on/off switching. While mercury lamps require complex drive circuits and need two to 15 minutes to warm up, the VLMU3500-385-060 and VLMU3500-385-120 allow for the use of simple low-voltage circuitry and require no warm-up period, stated the company.

Built on indium gallium nitride (InGaN) technology, the devices feature typical radiant power of 780mW at 500mA and 1037mW at 700mA in a wavelength range between 380nm and 390nm. The VLMU3500-385-060 offers an emission angle of 60° while the VLMU3500-385-120 has an emission angle of 120°. The devices provide radiant intensity of 730mW/sr and 390mW/sr at 700mA, respectively.

The LEDs' specifications make them ideal for UV curing in nail salon, dental and poster printing applications; blood and counterfeit money detection; and photocatalytic purification. RoHS-compliant, halogen-free, and Vishay Green, the VLMU3500-385-060 and VLMU3500-385-120 are compatible with reflow soldering processes and feature a Moisture Sensitivity Level of 2 in accordance with J-STD-020.

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