Seoul Viosys SMD LED UV CUN66A1F 365nm 420mW at 250mA 0.9W with PCB (10x10mm) 120deg

Seoul Viosys SMD LED UV CUN66A1F 365nm 420mW at 250mA 0.9W with PCB (10x10mm) 120deg

This product is a high-power UV-A LED with a peak wavelength of 365 nm and a radiant power of 420 mW at the specified drive current.

UV-A radiation in this range is the working wavelength for UV curing of adhesives, inks and coatings, for fluorescence excitation in inspection and analysis, and for counterfeit detection. An LED source has decisive advantages over a mercury lamp here: instant full output with no warm-up, free switching and dimming, a narrow emission band instead of a broad spectrum with unwanted infrared, a much longer service life and no mercury to dispose of.

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.

About Seoul Viosys

Seoul Viosys is the compound-semiconductor arm of the Seoul Semiconductor group and one of the established suppliers of UV LED technology, marketed under the Violeds name. Its UV-A, UV-B and UV-C packages are used in disinfection, curing, medical and analytical equipment, and the company publishes detailed radiometric and lifetime data for each package. Buying a branded UV LED matters more than in the white-light world: deep-UV output degrades measurably over time, and only a manufacturer that documents that degradation lets you design a system with a defined service interval.

Technical features

• Seoul Viosys CUN66A1F LED package
• Light colour: Ultraviolet
• Peak wavelength: 365 nm
• Radiant power: 420 mW (typical)
• Power consumption: 0.9 W
• Operating point: 250 mA at 3.6 V
• Beam angle: 120°
• Dimensions: 10 x 10 x 3 mm
• Manufacturer part number: CUN66A1F

Applications

• UV curing of adhesives, inks and coatings
• Fluorescence excitation and inspection
• Forensic and analytical equipment
• Counterfeit detection and document verification
• Insect traps and phototherapy equipment