Vishay Intertechnology has launched two new UVC (short-wavelength ultraviolet) emitting diodes in a ceramic and quartz-based package for sterilization in medical, industrial and consumer applications.
Compared to previous generation solutions, Vishay Semiconductors VLMU35CR40-275-120 and VLMU35CR41-275-120 provide greater radiant power at a lower cost while offering greater disinfection efficiency and longer service life.
The new devices feature high typical radiant power of 37 mW at 250 mA, which in terms of mW/$ performance is 30% higher than lower power emitting diodes and 12x better than previous generation solutions. Additionally, the VLMU35CR41-275-120 provides a minimum radiant power of 30 mW at 250 mA, which is the same as the closest competing device at 350 mA.
Emitting diodes offer a wavelength range of 265 to 280 nm, with a typical wavelength of 274 nm. This is not only suitable for direct disinfection of surfaces, air and static water, but compared to 280nm solutions, the VLMU35CR40-275-120 and VLMU35CR41-275-120 offer 20% higher sterilization efficiency.
Available in a compact, thermally optimized surface-mount package of 3.45 x 3.45 x 1.7 mm with ceramic substrate and quartz window, the devices guarantee a long service life of 27,000 hours at 250 mA and 25 °C .
Built on AlGaN technology, the VLMU35CR40-275-120 and VLMU35CR41-275-120 are designed to replace low-pressure UVC mercury tubes, especially in compact designs where small components are required. Typical end products will include sterilization devices for headphones, toothbrushes, water bottles, refrigerators, air purifiers, door handles, medical instruments, coffee machines, ATMs, toilet seats, vacuum cleaners and more.
The devices feature DC forward current of up to 300 mA, forward voltage of up to 5.2 V and an emission angle of ±60°. RoHS compliant, halogen-free and Vishay Green, the VLMU35CR40-275-120 and VLMU35CR41-275-120 are compatible with reflow soldering processes and feature a moisture sensitivity level of 3 in accordance with J-STD-020 .