UVA LED Datasheets

Download specifications for UVA LED series

Round UVA LEDs

5 models

Model Size Updated Download
UVA LED 3mm 3mm — PDF
UVA LED 4mm 4mm — PDF
UVA LED 5mm 5mm — PDF
UVA LED 8mm 8mm — PDF
UVA LED 10mm 10mm — PDF

Flat-top, bullet and high-power UVA LED series are continuously updated — contact sales@queendomlamp.com for the latest list.

All specifications are subject to change without prior notice.
Datasheets are updated periodically. If your required model is not listed or the file appears outdated,
please contact our technical support team at sales@queendomlamp.com.

UVA LED Selection Guide

Choosing the Wavelength

Wavelength Characteristics Typical Applications
365 nm Highest photon energy in UVA; strongest cure, lowest visible fluorescence UV curing adhesives, PCB inspection, fluorescence analysis
385 nm High cure speed with better LED efficiency than 365 nm Ink curing, printing, coating
395 nm Industrial workhorse: best cost/output balance Curing, nail gel lamps, wood coating
405 nm Efficient, mild cure 3D printing resins, bonding, validation

Design and Safety Notes

  • Radiometric power (mW) — not luminous intensity — is the specification that matters for curing; compare at equal test current
  • Thermal control is critical: UVA output droops as junction temperature rises; keep Tj below 80 °C for stable output
  • Eye protection: UVA causes photochemical damage to the cornea and lens over time — use UV-blocking eyewear and interlocked enclosures for curing equipment
  • Photopolymer compatibility: confirm the resin absorption spectrum overlaps the LED wavelength before committing to a design

For high-power and SMD UVA formats, see the UV LED product family. Download the UV safety statement (PDF) for handling requirements.

Wavelength Selection by Application

The 365–405 nm UVA band is not interchangeable: every photochemistry has an absorption window, and matching the emitter to it is the difference between a 5-second cure and a tacky surface. The table below maps the wavelengths we stock in DIP packages to the applications they serve best.

Peak Wavelength Typical Radiometric Power Best-Fit Applications Notes
365 nm 80–120 mW @ 20 mA Fluorescence inspection, counterfeit detection, adhesive curing Shortest practical UVA; highest photon energy in band
385 nm 100–180 mW @ 20 mA UV-curable coatings, potting compounds Good balance of output and phosphor-free stability
395 nm 150–350 mW @ 20–40 mA Inkjet ink curing, wood coating, 3D-print resin Highest commercial output per dollar in the band
405 nm 120–200 mW @ 20 mA Gel nails, resin printing, optical brightening Mild chemistry; lowest photobiological concern in UVA

Dosage and Irradiance Budgeting

UV curing is an energy equation, not a brightness contest. A typical free-radical acrylate needs 1–4 J/cm² of delivered dose to reach full through-cure, and cationic epoxies need 5–10 J/cm². Start from the emitter’s datasheet irradiance at the working distance (mW/cm²), then divide the required dose by it to get the minimum dwell time:

  • Dose (mJ/cm²) = irradiance (mW/cm²) × exposure time (s)
  • Halve the distance and irradiance rises roughly 3–4× under a focused DIP lens — but the useful field shrinks
  • Derate datasheet output by 15–20% for thermal steady state and glass/cover-plate absorption
  • Belt speed and pass count must be validated by tack-free and pull-off tests, not by eye

For a worked example with production data, see the UV LED curing system case study, where 395 nm bars replaced mercury lamps on a label press. If your requirement is germicidal rather than curing, UVC (265–280 nm) is the correct band — see the UVC LED water treatment case study for a 4-log inactivation design.

Package and Optical Design Notes for DIP UVA

DIP UVA LEDs pair a 5 mm or 3 mm epoxy or glass lens with a compact die. The lens geometry sets both the half-angle and the peak intensity: narrow 15–20° parts concentrate irradiance for distance curing and sensor excitation, while 60–120° parts build uniform flood arrays. In dense arrays, stagger emitters at 1.5–2× the working distance to overlap the 50% intensity contours. Keep sustained junction temperature below 100 °C by thermally anchoring the anvil/cathode posts to copper pours; UVA output droops about 0.5% per °C above 25 °C, and the shift compounds in long production runs.

Frequently Asked Questions

How much does peak wavelength drift with drive current and temperature?

Expect −1 to −2 nm of red-shift at the datasheet current limit and another −1 nm at maximum junction temperature. For tight processes, lock the bin at order time and specify ±2.5 nm tolerance on the datasheet line item.

Can I run DIP UVA LEDs on a constant-voltage supply with resistors?

For indication or low-duty sensing, yes — size the resistor for the worst-case forward voltage window. For curing, no: use constant-current drive. Resistor ballasting wastes the radiometric headroom that sets cure speed, and forward-voltage spread across a batch makes output vary die to die.

What service life should I plan for?

Driven at rated current with junction temperature held under 80 °C, plan on L70 > 20,000 hours for 395/405 nm parts and 10,000–15,000 hours for 365 nm, whose shorter wavelength stresses the encapsulant faster. Schedule radiometric re-checks at 2,000-hour intervals on production lines.

Do UVA emitters need the same safety controls as UVC?

UVA is far less hazardous than UVC but is not risk-free: ACGIH threshold-limit guidance caps 365 nm exposure near 1 mJ/cm² over an 8-hour window for eye tissue. Shield lines with polycarbonate or acrylic barriers, block direct line-of-sight to the array, and interlock access doors on production enclosures.