28-09-2022 | Vishay | Lighting Technologies
Vishay Intertechnology, Inc has released two new UVC (short wavelength ultraviolet) emitting diodes in a ceramic/quartz-based package for sterilisation in medical, industrial, and consumer applications. Compared to past-generation solutions, the Vishay Semiconductors VLMU35CR40-275-120 and VLMU35CR41-275-120 provide higher radiant power at a lower cost while delivering higher disinfection efficiency and longer service life.
The devices offer high typical radiant power of 37mW at 250mA, which in terms of mW/$ performance is 30% higher than lower power emitter diodes and 12x better than previous-generation solutions. Also, the VLMU35CR41-275-120 supplies a minimum radiant power of 30mW at 250mA, which is the same as the closest competing device at 350mA.
The emitter diodes provide a wavelength range of 265nm to 280nm, with a typical wavelength of 274 nm. Not only is this ideal for direct disinfection of surfaces, air, and static water, but compared to 280nm solutions, the devices deliver 20% higher sterilisation efficiency. Available in a compact, thermally optimised surface-mount 3.45mm x 3.45mm x 1.7mm package with a ceramic substrate and quartz window, the devices provide a long service life of 27,000 hours at 250mA and 25C.
Built on AlGaN technology, the devices are designed to replace low-pressure UVC mercury tubes, especially in compact designs where small components are required. Typical end products will include sterilisation devices for earbuds, toothbrushes, water bottles, refrigerators, air purifiers, coffee machines, ATMs, door handles, medical instruments, toilet seats, vacuum cleaners, and more.
The devices provide DC forward current up to 300mA, forward voltage down to 5.2V, and an emission angle of ±60 degrees. RoHS-compliant, halogen-free, and Vishay Green, the VLMU35CR40-275-120 and VLMU35CR41-275-120 are compatible with reflow soldering processes and provide a Moisture Sensitivity Level of 3 in accordance with J-STD-020.
