Sensor Electronic Technology, Inc. (SETi) has made a milestone to overcome the short lifetime of 280nm UVLEDs with of over 10,000 hours on its UVTOP275 LEDs.

The lifetime demonstration has been performed on a statistically valid group of LEDs from several batches which are representative of UVTOP275 products; the LEDs were packaged in TO-39 metal-glass packages with flat windows and emit at a wavelength of 280nm ±5nm at an average power of 0.8mW after burn-in.

Lifetime analysis was performed to SETi standard procedure; driven with a current of 20mA DC at room temperature (approximately 23⁰C ambient) with no heatsink or thermal management.  The LEDs were physically life tested to approximately 2,000 hours and L50 levels (50% of the LED’s original power) modelled from these tests.

So far, this lifetime has not been released in the UVTOP product specifications, however,SETi does expect its UVTOP275 LEDs to exhibit L50 lifetimes approaching 5,000 hours and is developing future products to meet extended lifetime specs.