Nichia SMD LED UVB NCSU434B 308nm 90mW at 350mA 1.75W with PCB (10x10mm)

Nichia SMD LED UVB NCSU434B 308nm 90mW at 350mA 1.75W with PCB (10x10mm)

This product is a high-power UV-B LED with a peak wavelength of 308 nm and a radiant power of 90 mW at the specified drive current.

The germicidal effect of UV-C radiation is well documented: photons in the 250–280 nm range are absorbed by the DNA and RNA of micro-organisms and form dimers that prevent replication, which inactivates bacteria, moulds and viruses. The decisive design parameter is the dose, that is the irradiance on the target surface multiplied by the exposure time, so the radiant power, the beam angle and the working distance all have to be considered together when sizing an application.

This version is supplied ready-mounted on a 10 x 10 mm metal-core board. That solves the two hardest problems of working with deep-UV packages: the LED is already soldered with the correct profile, and the metal core conducts the heat away from the die. Reflow-soldering a UV package by hand is difficult and easily damages it, so the pre-mounted version is usually the faster and safer route into a prototype.

Two properties distinguish UV LEDs from white LEDs in the design work. Their radiant output is specified in milliwatts rather than lumens, because the human eye is not the measuring instrument here. And they are considerably more sensitive to junction temperature, with both the output and the lifetime falling noticeably as the LED heats up, so a generously dimensioned heat sink is not optional.

Why we build with Nichia LEDs

Nichia is a major Japanese LED manufacturer and one of the companies closely associated with the development and commercialisation of high-brightness blue and white LED technology. Its professional lighting LEDs are selected for well-documented optical and electrical characteristics, tight binning options and long-term characterisation. For a luminaire maker, that means the PCB, driver and thermal design can be built around defined forward-voltage, flux, colour and temperature limits instead of anonymous components whose behaviour may change from one batch to the next.

Important safety information

UV-C and UV-B radiation is harmful to skin and eyes. This product is intended exclusively for professional and industrial use and must never be operated where people, animals or plants can be exposed to the direct or reflected radiation. Suitable protective equipment, interlocks and shielding are mandatory, and the applicable national regulations on optical radiation at the workplace must be observed. The product is supplied as a component for integration by qualified personnel.

Technical features

• Nichia NCSU434B LED package
• Light colour: Ultraviolet
• Peak wavelength: 308 nm
• Radiant power: 90 mW (typical)
• Power consumption: 1.75 W
• Operating point: 350 mA at 5 V
• Dimensions: 10 x 10 mm
• Manufacturer part number: NCSU434B

Applications

• Air, surface and water disinfection systems
• Medical and laboratory equipment
• Industrial process and conveyor disinfection
• OEM integration into sterilisation devices