News: LEDs
15 April 2026
Silanna UV adds TO-39 flat-window package to SF1 and SN3 series of UV-C LEDs
Silanna UV of Brisbane, Australia – which provides far-UVC light sources for water quality sensors, gas sensors, disinfection, and HPLC (high-performance liquid chromatography) applications – has released an additional package type: a TO-39 flat-window package for its high-performance SF1 series (Far-UVC 235nm) and SN3 series (Deep-UVC 255nm) LEDs. This latest development expands the firm’s comprehensive metal can UVC LED portfolio, delivering greater optical flexibility, compact integration, and proven reliability for advanced sensing applications.
Picture: TO-39 flat-window package for Silanna UV’s SN3 series LEDs.
The new flat-window configuration is designed to meet the evolving requirements of next-generation analytical, environmental, and medical devices. By enabling the integration of custom secondary optics, the package allows precise beam shaping, optimizing performance across water, air and gas sensing applications.
Enhanced design flexibility and integration
The TO-39 flat-window package introduces several key advantages. Its optical flexibility allows engineers to integrate external lenses or light guides, enabling precise control of beam angles to suit specific sensing or flow-chamber requirements. The low-profile flat lid improves space efficiency, supporting compact system designs suitable for portable water purification systems and handheld medical sterilization devices.
Built on Silanna UV’s patented nitride semiconductor technology, the package also delivers proven reliability, maintaining high thermal stability and long operational lifetimes, as demonstrated by the SF1 and SN3 series in real-world customer testing.
SN3 series: high-performance deep UVC for analytical precision
The SN3 series delivers powerful deep UVC output at a peak wavelength of 255nm, making it highly effective for detecting chemical oxygen demand (COD) and total organic carbon (TOC) in water, as well as ozone in gas sensing applications. Featuring a wide 120-degree viewing angle and high optical output power, the SN3-5T9FWL1 is suited to demanding use cases including chemical and biological analysis, water quality monitoring, gas sensing, and liquid chromatography. The device also integrates ESD protection within an industry-standard metal-can footprint, ensuring durability and reliable performance in harsh and challenging environments.
SF1 series: far-UVC innovation for expanded sensing capabilities
Operating at a peak wavelength of 235nm, the SF1 series enables new sensing capabilities that require shorter wavelengths. The SF1-3T9FWL1 supports accurate detection of nitrate (NO3) and nitrite (NO2) in water, as well as carbon dioxide (CO2) in gas analysis applications. Its hermetically sealed TO-can package provides enhanced environmental protection, while the mercury-free design offers a more robust and sustainable alternative to traditional UV lamps.
Suitable for chemical and biological analysis, water monitoring, gas sensing, and HPLC applications, the SF1 series combines versatility with proven reliability. Like the SN3 series, SF1 devices also incorporate integrated ESD protection within a compact, industry-standard package.
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